denoland-deno/cli/tests/lsp_tests.rs

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.

mod lsp {
  use deno_ast::ModuleSpecifier;
  use deno_core::serde::de::DeserializeOwned;
  use deno_core::serde::Deserialize;
  use deno_core::serde::Serialize;
  use deno_core::serde_json;
  use deno_core::serde_json::json;
  use deno_core::serde_json::Value;
  use deno_core::url::Url;
  use pretty_assertions::assert_eq;
  use std::collections::HashSet;
  use std::fs;
  use std::process::Stdio;
  use test_util::deno_cmd_with_deno_dir;
  use test_util::deno_exe_path;
  use test_util::env_vars_for_npm_tests;
  use test_util::http_server;
  use test_util::lsp::LspClient;
  use test_util::testdata_path;
  use test_util::TempDir;
  use tower_lsp::lsp_types as lsp;

  fn load_fixture(path: &str) -> Value {
    load_fixture_as(path)
  }

  fn load_fixture_as<T>(path: &str) -> T
  where
    T: DeserializeOwned,
  {
    let fixture_str = load_fixture_str(path);
    serde_json::from_str::<T>(&fixture_str).unwrap()
  }

  fn load_fixture_str(path: &str) -> String {
    let fixtures_path = testdata_path().join("lsp");
    let path = fixtures_path.join(path);
    fs::read_to_string(path).unwrap()
  }

  fn init(init_path: &str) -> LspClient {
    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", load_fixture(init_path))
      .unwrap();
    client.write_notification("initialized", json!({})).unwrap();
    client
  }

  fn did_open<V>(
    client: &mut LspClient,
    params: V,
  ) -> Vec<lsp::PublishDiagnosticsParams>
  where
    V: Serialize,
  {
    client
      .write_notification("textDocument/didOpen", params)
      .unwrap();

    handle_configuration_request(
      client,
      json!([{
        "enable": true,
        "codeLens": {
          "test": true
        }
      }]),
    );
    read_diagnostics(client).0
  }

  fn handle_configuration_request(client: &mut LspClient, result: Value) {
    let (id, method, _) = client.read_request::<Value>().unwrap();
    assert_eq!(method, "workspace/configuration");
    client.write_response(id, result).unwrap();
  }

  fn read_diagnostics(client: &mut LspClient) -> CollectedDiagnostics {
    // diagnostics come in batches of three unless they're cancelled
    let mut diagnostics = vec![];
    for _ in 0..3 {
      let (method, response) = client
        .read_notification::<lsp::PublishDiagnosticsParams>()
        .unwrap();
      assert_eq!(method, "textDocument/publishDiagnostics");
      diagnostics.push(response.unwrap());
    }
    CollectedDiagnostics(diagnostics)
  }

  fn shutdown(client: &mut LspClient) {
    client
      .write_request::<_, _, Value>("shutdown", json!(null))
      .unwrap();
    client.write_notification("exit", json!(null)).unwrap();
  }

  pub fn ensure_directory_specifier(
    mut specifier: ModuleSpecifier,
  ) -> ModuleSpecifier {
    let path = specifier.path();
    if !path.ends_with('/') {
      let new_path = format!("{}/", path);
      specifier.set_path(&new_path);
    }
    specifier
  }

  struct TestSession {
    client: LspClient,
    open_file_count: usize,
  }

  impl TestSession {
    pub fn from_file(init_path: &str) -> Self {
      Self::from_client(init(init_path))
    }

    pub fn from_client(client: LspClient) -> Self {
      Self {
        client,
        open_file_count: 0,
      }
    }

    pub fn did_open<V>(&mut self, params: V) -> CollectedDiagnostics
    where
      V: Serialize,
    {
      self
        .client
        .write_notification("textDocument/didOpen", params)
        .unwrap();

      let (id, method, _) = self.client.read_request::<Value>().unwrap();
      assert_eq!(method, "workspace/configuration");
      self
        .client
        .write_response(
          id,
          json!([{
            "enable": true,
            "codeLens": {
              "test": true
            }
          }]),
        )
        .unwrap();

      self.open_file_count += 1;
      self.read_diagnostics()
    }

    pub fn read_diagnostics(&mut self) -> CollectedDiagnostics {
      let mut all_diagnostics = Vec::new();
      for _ in 0..self.open_file_count {
        all_diagnostics.extend(read_diagnostics(&mut self.client).0);
      }
      CollectedDiagnostics(all_diagnostics)
    }

    pub fn shutdown_and_exit(&mut self) {
      shutdown(&mut self.client);
    }
  }

  #[derive(Debug, Clone)]
  struct CollectedDiagnostics(Vec<lsp::PublishDiagnosticsParams>);

  impl CollectedDiagnostics {
    /// Gets the diagnostics that the editor will see after all the publishes.
    pub fn viewed(&self) -> Vec<lsp::Diagnostic> {
      self
        .viewed_messages()
        .into_iter()
        .flat_map(|m| m.diagnostics)
        .collect()
    }

    /// Gets the messages that the editor will see after all the publishes.
    pub fn viewed_messages(&self) -> Vec<lsp::PublishDiagnosticsParams> {
      // go over the publishes in reverse order in order to get
      // the final messages that will be shown in the editor
      let mut messages = Vec::new();
      let mut had_specifier = HashSet::new();
      for message in self.0.iter().rev() {
        if had_specifier.insert(message.uri.clone()) {
          messages.insert(0, message.clone());
        }
      }
      messages
    }

    pub fn with_source(&self, source: &str) -> lsp::PublishDiagnosticsParams {
      self
        .viewed_messages()
        .iter()
        .find(|p| {
          p.diagnostics
            .iter()
            .any(|d| d.source == Some(source.to_string()))
        })
        .map(ToOwned::to_owned)
        .unwrap()
    }

    pub fn with_file_and_source(
      &self,
      specifier: &str,
      source: &str,
    ) -> lsp::PublishDiagnosticsParams {
      let specifier = ModuleSpecifier::parse(specifier).unwrap();
      self
        .viewed_messages()
        .iter()
        .find(|p| {
          p.uri == specifier
            && p
              .diagnostics
              .iter()
              .any(|d| d.source == Some(source.to_string()))
        })
        .map(ToOwned::to_owned)
        .unwrap()
    }
  }

  #[test]
  fn lsp_startup_shutdown() {
    let mut client = init("initialize_params.json");
    shutdown(&mut client);
  }

  #[test]
  fn lsp_init_tsconfig() {
    let temp_dir = TempDir::new();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    let tsconfig =
      serde_json::to_vec_pretty(&load_fixture("lib.tsconfig.json")).unwrap();
    fs::write(temp_dir.path().join("lib.tsconfig.json"), tsconfig).unwrap();

    params.root_uri = Some(Url::from_file_path(temp_dir.path()).unwrap());
    if let Some(Value::Object(mut map)) = params.initialization_options {
      map.insert("config".to_string(), json!("./lib.tsconfig.json"));
      params.initialization_options = Some(Value::Object(map));
    }

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    client.write_notification("initialized", json!({})).unwrap();

    let diagnostics = did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "location.pathname;\n"
        }
      }),
    );

    let diagnostics = diagnostics.into_iter().flat_map(|x| x.diagnostics);
    assert_eq!(diagnostics.count(), 0);

    shutdown(&mut client);
  }

  #[test]
  fn lsp_tsconfig_types() {
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    let temp_dir = TempDir::new();
    let tsconfig =
      serde_json::to_vec_pretty(&load_fixture("types.tsconfig.json")).unwrap();
    fs::write(temp_dir.path().join("types.tsconfig.json"), tsconfig).unwrap();
    let a_dts = load_fixture_str("a.d.ts");
    fs::write(temp_dir.path().join("a.d.ts"), a_dts).unwrap();

    params.root_uri = Some(Url::from_file_path(temp_dir.path()).unwrap());
    if let Some(Value::Object(mut map)) = params.initialization_options {
      map.insert("config".to_string(), json!("./types.tsconfig.json"));
      params.initialization_options = Some(Value::Object(map));
    }

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    client.write_notification("initialized", json!({})).unwrap();

    let diagnostics = did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": Url::from_file_path(temp_dir.path().join("test.ts")).unwrap(),
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(a);\n"
        }
      }),
    );

    let diagnostics = diagnostics.into_iter().flat_map(|x| x.diagnostics);
    assert_eq!(diagnostics.count(), 0);

    shutdown(&mut client);
  }

  #[test]
  fn lsp_tsconfig_bad_config_path() {
    let mut client = init("initialize_params_bad_config_option.json");
    let (method, maybe_params) = client.read_notification().unwrap();
    assert_eq!(method, "window/showMessage");
    assert_eq!(maybe_params, Some(lsp::ShowMessageParams {
    typ: lsp::MessageType::WARNING,
    message: "The path to the configuration file (\"bad_tsconfig.json\") is not resolvable.".to_string()
  }));
    let diagnostics = did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(Deno.args);\n"
        }
      }),
    );
    let diagnostics = diagnostics.into_iter().flat_map(|x| x.diagnostics);
    assert_eq!(diagnostics.count(), 0);
  }

  #[test]
  fn lsp_triple_slash_types() {
    let temp_dir = TempDir::new();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    let a_dts = load_fixture_str("a.d.ts");
    fs::write(temp_dir.path().join("a.d.ts"), a_dts).unwrap();

    params.root_uri = Some(Url::from_file_path(temp_dir.path()).unwrap());

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    client.write_notification("initialized", json!({})).unwrap();

    let diagnostics = did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": Url::from_file_path(temp_dir.path().join("test.ts")).unwrap(),
          "languageId": "typescript",
          "version": 1,
          "text": "/// <reference types=\"./a.d.ts\" />\n\nconsole.log(a);\n"
        }
      }),
    );

    let diagnostics = diagnostics.into_iter().flat_map(|x| x.diagnostics);
    assert_eq!(diagnostics.count(), 0);

    shutdown(&mut client);
  }

  #[test]
  fn lsp_import_map() {
    let temp_dir = TempDir::new();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    let import_map =
      serde_json::to_vec_pretty(&load_fixture("import-map.json")).unwrap();
    fs::write(temp_dir.path().join("import-map.json"), import_map).unwrap();
    fs::create_dir(temp_dir.path().join("lib")).unwrap();
    fs::write(
      temp_dir.path().join("lib").join("b.ts"),
      r#"export const b = "b";"#,
    )
    .unwrap();

    params.root_uri = Some(Url::from_file_path(temp_dir.path()).unwrap());
    if let Some(Value::Object(mut map)) = params.initialization_options {
      map.insert("importMap".to_string(), json!("import-map.json"));
      params.initialization_options = Some(Value::Object(map));
    }

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    client.write_notification("initialized", json!({})).unwrap();
    let uri = Url::from_file_path(temp_dir.path().join("a.ts")).unwrap();

    let diagnostics = did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": uri,
          "languageId": "typescript",
          "version": 1,
          "text": "import { b } from \"/~/b.ts\";\n\nconsole.log(b);\n"
        }
      }),
    );

    let diagnostics = diagnostics.into_iter().flat_map(|x| x.diagnostics);
    assert_eq!(diagnostics.count(), 0);

    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": uri
          },
          "position": {
            "line": 2,
            "character": 12
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value":"(alias) const b: \"b\"\nimport b"
          },
          ""
        ],
        "range": {
          "start": {
            "line": 2,
            "character": 12
          },
          "end": {
            "line": 2,
            "character": 13
          }
        }
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_import_map_data_url() {
    let mut client = init("initialize_params_import_map.json");
    let diagnostics = did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import example from \"example\";\n"
        }
      }),
    );

    let mut diagnostics = diagnostics.into_iter().flat_map(|x| x.diagnostics);
    // This indicates that the import map from initialize_params_import_map.json
    // is applied correctly.
    assert!(diagnostics.any(|diagnostic| diagnostic.code
      == Some(lsp::NumberOrString::String("no-cache".to_string()))
      && diagnostic
        .message
        .contains("https://deno.land/x/example/mod.ts")));
    shutdown(&mut client);
  }

  #[test]
  fn lsp_import_map_config_file() {
    let temp_dir = TempDir::new();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();

    let deno_import_map_jsonc =
      serde_json::to_vec_pretty(&load_fixture("deno.import_map.jsonc"))
        .unwrap();
    fs::write(
      temp_dir.path().join("deno.import_map.jsonc"),
      deno_import_map_jsonc,
    )
    .unwrap();

    params.root_uri = Some(Url::from_file_path(temp_dir.path()).unwrap());
    if let Some(Value::Object(mut map)) = params.initialization_options {
      map.insert("config".to_string(), json!("./deno.import_map.jsonc"));
      params.initialization_options = Some(Value::Object(map));
    }
    let import_map =
      serde_json::to_vec_pretty(&load_fixture("import-map.json")).unwrap();
    fs::write(temp_dir.path().join("import-map.json"), import_map).unwrap();
    fs::create_dir(temp_dir.path().join("lib")).unwrap();
    fs::write(
      temp_dir.path().join("lib").join("b.ts"),
      r#"export const b = "b";"#,
    )
    .unwrap();

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    client.write_notification("initialized", json!({})).unwrap();
    let uri = Url::from_file_path(temp_dir.path().join("a.ts")).unwrap();

    let diagnostics = did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": uri,
          "languageId": "typescript",
          "version": 1,
          "text": "import { b } from \"/~/b.ts\";\n\nconsole.log(b);\n"
        }
      }),
    );

    let diagnostics = diagnostics.into_iter().flat_map(|x| x.diagnostics);
    assert_eq!(diagnostics.count(), 0);

    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": uri
          },
          "position": {
            "line": 2,
            "character": 12
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value":"(alias) const b: \"b\"\nimport b"
          },
          ""
        ],
        "range": {
          "start": {
            "line": 2,
            "character": 12
          },
          "end": {
            "line": 2,
            "character": 13
          }
        }
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_deno_task() {
    let temp_dir = TempDir::new();
    let workspace_root = temp_dir.path().canonicalize().unwrap();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    fs::write(
      workspace_root.join("deno.jsonc"),
      r#"{
    "tasks": {
      "build": "deno test",
      "some:test": "deno bundle mod.ts"
    }
  }"#,
    )
    .unwrap();

    params.root_uri = Some(Url::from_file_path(workspace_root).unwrap());

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>("deno/task", json!(null))
      .unwrap();

    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!([
        {
          "name": "build",
          "detail": "deno test"
        },
        {
          "name": "some:test",
          "detail": "deno bundle mod.ts"
        }
      ]))
    );
  }

  #[test]
  fn lsp_import_assertions() {
    let mut client = init("initialize_params_import_map.json");
    client
      .write_notification(
        "textDocument/didOpen",
        json!({
          "textDocument": {
            "uri": "file:///a/test.json",
            "languageId": "json",
            "version": 1,
            "text": "{\"a\":1}"
          }
        }),
      )
      .unwrap();
    handle_configuration_request(
      &mut client,
      json!([{
        "enable": true,
        "codeLens": {
          "test": true
        }
      }]),
    );

    let diagnostics = CollectedDiagnostics(did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/a.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import a from \"./test.json\";\n\nconsole.log(a);\n"
        }
      }),
    ));

    assert_eq!(
      json!(
        diagnostics
          .with_file_and_source("file:///a/a.ts", "deno")
          .diagnostics
      ),
      json!([
        {
          "range": {
            "start": {
              "line": 0,
              "character": 14
            },
            "end": {
              "line": 0,
              "character": 27
            }
          },
          "severity": 1,
          "code": "no-assert-type",
          "source": "deno",
          "message": "The module is a JSON module and not being imported with an import assertion. Consider adding `assert { type: \"json\" }` to the import statement."
        }
      ])
    );

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeAction",
        load_fixture("code_action_params_import_assertion.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_action_response_import_assertion.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_import_map_import_completions() {
    let temp_dir = TempDir::new();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    let import_map =
      serde_json::to_vec_pretty(&load_fixture("import-map-completions.json"))
        .unwrap();
    fs::write(temp_dir.path().join("import-map.json"), import_map).unwrap();
    fs::create_dir(temp_dir.path().join("lib")).unwrap();
    fs::write(
      temp_dir.path().join("lib").join("b.ts"),
      r#"export const b = "b";"#,
    )
    .unwrap();

    params.root_uri = Some(Url::from_file_path(temp_dir.path()).unwrap());
    if let Some(Value::Object(mut map)) = params.initialization_options {
      map.insert("importMap".to_string(), json!("import-map.json"));
      params.initialization_options = Some(Value::Object(map));
    }

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    client.write_notification("initialized", json!({})).unwrap();
    let uri = Url::from_file_path(temp_dir.path().join("a.ts")).unwrap();

    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": uri,
          "languageId": "typescript",
          "version": 1,
          "text": "import * as a from \"/~/b.ts\";\nimport * as b from \"\""
        }
      }),
    );

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": uri
          },
          "position": {
            "line": 1,
            "character": 20
          },
          "context": {
            "triggerKind": 2,
            "triggerCharacter": "\""
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "isIncomplete": false,
        "items": [
          {
            "label": ".",
            "kind": 19,
            "detail": "(local)",
            "sortText": "1",
            "insertText": ".",
            "commitCharacters": ["\"", "'"],
          },
          {
            "label": "..",
            "kind": 19,
            "detail": "(local)",
            "sortText": "1",
            "insertText": "..",
            "commitCharacters": ["\"", "'"],
          },
          {
            "label": "std",
            "kind": 19,
            "detail": "(import map)",
            "sortText": "std",
            "insertText": "std",
            "commitCharacters": ["\"", "'"],
          },
          {
            "label": "fs",
            "kind": 17,
            "detail": "(import map)",
            "sortText": "fs",
            "insertText": "fs",
            "commitCharacters": ["\"", "'"],
          },
          {
            "label": "/~",
            "kind": 19,
            "detail": "(import map)",
            "sortText": "/~",
            "insertText": "/~",
            "commitCharacters": ["\"", "'"],
          }
        ]
      }))
    );

    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": uri,
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 1,
                  "character": 20
                },
                "end": {
                  "line": 1,
                  "character": 20
                }
              },
              "text": "/~/"
            }
          ]
        }),
      )
      .unwrap();
    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");
    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");
    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": uri
          },
          "position": {
            "line": 1,
            "character": 23
          },
          "context": {
            "triggerKind": 2,
            "triggerCharacter": "/"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "isIncomplete": false,
        "items": [
          {
            "label": "b.ts",
            "kind": 9,
            "detail": "(import map)",
            "sortText": "1",
            "filterText": "/~/b.ts",
            "textEdit": {
              "range": {
                "start": {
                  "line": 1,
                  "character": 20
                },
                "end": {
                  "line": 1,
                  "character": 23
                }
              },
              "newText": "/~/b.ts"
            },
            "commitCharacters": ["\"", "'"],
          }
        ]
      }))
    );

    shutdown(&mut client);
  }

  #[test]
  fn lsp_hover() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(Deno.args);\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 19
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value": "const Deno.args: string[]"
          },
          "Returns the script arguments to the program.\n\nGive the following command line invocation of Deno:\n\n```sh\ndeno run --allow-read https://deno.land/std/examples/cat.ts /etc/passwd\n```\n\nThen `Deno.args` will contain:\n\n```\n[ \"/etc/passwd\" ]\n```\n\nIf you are looking for a structured way to parse arguments, there is the\n[`std/flags`](https://deno.land/std/flags) module as part of the Deno\nstandard library.",
          "\n\n*@category* - Runtime Environment",
        ],
        "range": {
          "start": {
            "line": 0,
            "character": 17
          },
          "end": {
            "line": 0,
            "character": 21
          }
        }
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_hover_asset() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(Date.now());\n"
        }
      }),
    );
    let (_, maybe_error) = client
      .write_request::<_, _, Value>(
        "textDocument/definition",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 14
          }
        }),
      )
      .unwrap();
    assert!(maybe_error.is_none());
    let (_, maybe_error) = client
      .write_request::<_, _, Value>(
        "deno/virtualTextDocument",
        json!({
          "textDocument": {
            "uri": "deno:/asset/lib.deno.shared_globals.d.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_error.is_none());
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "deno:/asset/lib.es2015.symbol.wellknown.d.ts"
          },
          "position": {
            "line": 109,
            "character": 13
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value": "interface Date",
          },
          "Enables basic storage and retrieval of dates and times."
        ],
        "range": {
          "start": {
            "line": 109,
            "character": 10,
          },
          "end": {
            "line": 109,
            "character": 14,
          }
        }
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_hover_disabled() {
    let mut client = init("initialize_params_disabled.json");
    client
      .write_notification(
        "textDocument/didOpen",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "languageId": "typescript",
            "version": 1,
            "text": "console.log(Date.now());\n"
          }
        }),
      )
      .unwrap();

    handle_configuration_request(&mut client, json!([{ "enable": false }]));

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 19
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!(null)));
    shutdown(&mut client);
  }

  #[test]
  fn lsp_inlay_hints() {
    let mut client = init("initialize_params_hints.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": r#"function a(b: string) {
          return b;
        }

        a("foo");

        enum C {
          A,
        }

        parseInt("123", 8);

        const d = Date.now();

        class E {
          f = Date.now();
        }

        ["a"].map((v) => v + v);
        "#
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/inlayHint",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "range": {
            "start": {
              "line": 0,
              "character": 0
            },
            "end": {
              "line": 19,
              "character": 0,
            }
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      json!(maybe_res),
      json!([
        {
          "position": {
            "line": 0,
            "character": 21
          },
          "label": ": string",
          "kind": 1,
          "paddingLeft": true
        },
        {
          "position": {
            "line": 4,
            "character": 10
          },
          "label": "b:",
          "kind": 2,
          "paddingRight": true
        },
        {
          "position": {
            "line": 7,
            "character": 11
          },
          "label": "= 0",
          "paddingLeft": true
        },
        {
          "position": {
            "line": 10,
            "character": 17
          },
          "label": "string:",
          "kind": 2,
          "paddingRight": true
        },
        {
          "position": {
            "line": 10,
            "character": 24
          },
          "label": "radix:",
          "kind": 2,
          "paddingRight": true
        },
        {
          "position": {
            "line": 12,
            "character": 15
          },
          "label": ": number",
          "kind": 1,
          "paddingLeft": true
        },
        {
          "position": {
            "line": 15,
            "character": 11
          },
          "label": ": number",
          "kind": 1,
          "paddingLeft": true
        },
        {
          "position": {
            "line": 18,
            "character": 18
          },
          "label": "callbackfn:",
          "kind": 2,
          "paddingRight": true
        },
        {
          "position": {
            "line": 18,
            "character": 20
          },
          "label": ": string",
          "kind": 1,
          "paddingLeft": true
        },
        {
          "position": {
            "line": 18,
            "character": 21
          },
          "label": ": string",
          "kind": 1,
          "paddingLeft": true
        }
      ])
    );
  }

  #[test]
  fn lsp_inlay_hints_not_enabled() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": r#"function a(b: string) {
          return b;
        }

        a("foo");

        enum C {
          A,
        }

        parseInt("123", 8);

        const d = Date.now();

        class E {
          f = Date.now();
        }

        ["a"].map((v) => v + v);
        "#
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/inlayHint",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "range": {
            "start": {
              "line": 0,
              "character": 0
            },
            "end": {
              "line": 19,
              "character": 0,
            }
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(json!(maybe_res), json!(null));
  }

  #[test]
  fn lsp_workspace_enable_paths() {
    let mut params: lsp::InitializeParams = serde_json::from_value(
      load_fixture("initialize_params_workspace_enable_paths.json"),
    )
    .unwrap();
    // we aren't actually writing anything to the tempdir in this test, but we
    // just need a legitimate file path on the host system so that logic that
    // tries to convert to and from the fs paths works on all env
    let temp_dir = TempDir::new();

    let root_specifier =
      ensure_directory_specifier(Url::from_file_path(temp_dir.path()).unwrap());

    params.root_uri = Some(root_specifier.clone());
    params.workspace_folders = Some(vec![lsp::WorkspaceFolder {
      uri: root_specifier.clone(),
      name: "project".to_string(),
    }]);

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    client.write_notification("initialized", json!({})).unwrap();

    handle_configuration_request(
      &mut client,
      json!([{
        "enable": false,
        "enablePaths": [
          "./worker"
        ],
      }]),
    );

    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": root_specifier.join("./file.ts").unwrap(),
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(Date.now());\n"
        }
      }),
    );

    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": root_specifier.join("./other/file.ts").unwrap(),
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(Date.now());\n"
        }
      }),
    );

    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": root_specifier.join("./worker/file.ts").unwrap(),
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(Date.now());\n"
        }
      }),
    );

    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": root_specifier.join("./worker/subdir/file.ts").unwrap(),
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(Date.now());\n"
        }
      }),
    );

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": root_specifier.join("./file.ts").unwrap(),
          },
          "position": {
            "line": 0,
            "character": 19
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!(null)));

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": root_specifier.join("./other/file.ts").unwrap(),
          },
          "position": {
            "line": 0,
            "character": 19
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!(null)));

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": root_specifier.join("./worker/file.ts").unwrap(),
          },
          "position": {
            "line": 0,
            "character": 19
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value": "(method) DateConstructor.now(): number",
          },
          "Returns the number of milliseconds elapsed since midnight, January 1, 1970 Universal Coordinated Time (UTC)."
        ],
        "range": {
          "start": {
            "line": 0,
            "character": 17,
          },
          "end": {
            "line": 0,
            "character": 20,
          }
        }
      }))
    );

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": root_specifier.join("./worker/subdir/file.ts").unwrap(),
          },
          "position": {
            "line": 0,
            "character": 19
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value": "(method) DateConstructor.now(): number",
          },
          "Returns the number of milliseconds elapsed since midnight, January 1, 1970 Universal Coordinated Time (UTC)."
        ],
        "range": {
          "start": {
            "line": 0,
            "character": 17,
          },
          "end": {
            "line": 0,
            "character": 20,
          }
        }
      }))
    );

    shutdown(&mut client);
  }

  #[test]
  fn lsp_hover_unstable_disabled() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(Deno.dlopen);\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 19
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value": "any"
          }
        ],
        "range": {
          "start": {
            "line": 0,
            "character": 17
          },
          "end": {
            "line": 0,
            "character": 23
          }
        }
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_hover_unstable_enabled() {
    let mut client = init("initialize_params_unstable.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(Deno.ppid);\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 19
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents":[
          {
            "language":"typescript",
            "value":"const Deno.ppid: number"
          },
          "The process ID of parent process of this instance of the Deno CLI.\n\n```ts\nconsole.log(Deno.ppid);\n```",
          "\n\n*@category* - Runtime Environment",
        ],
        "range":{
          "start":{
            "line":0,
            "character":17
          },
          "end":{
            "line":0,
            "character":21
          }
        }
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_hover_change_mbc() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "const a = `编写软件很难`;\nconst b = `👍🦕😃`;\nconsole.log(a, b);\n"
        }
      }),
    );
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 1,
                  "character": 11
                },
                "end": {
                  "line": 1,
                  // the LSP uses utf16 encoded characters indexes, so
                  // after the deno emoiji is character index 15
                  "character": 15
                }
              },
              "text": ""
            }
          ]
        }),
      )
      .unwrap();
    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");
    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");
    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 2,
            "character": 15
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value": "const b: \"😃\"",
          },
          "",
        ],
        "range": {
          "start": {
            "line": 2,
            "character": 15,
          },
          "end": {
            "line": 2,
            "character": 16,
          },
        }
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_hover_closed_document() {
    let temp_dir_guard = TempDir::new();
    let temp_dir = temp_dir_guard.path();
    let a_path = temp_dir.join("a.ts");
    fs::write(a_path, r#"export const a = "a";"#).unwrap();
    let b_path = temp_dir.join("b.ts");
    fs::write(&b_path, r#"export * from "./a.ts";"#).unwrap();
    let b_specifier = Url::from_file_path(b_path).unwrap();
    let c_path = temp_dir.join("c.ts");
    fs::write(&c_path, "import { a } from \"./b.ts\";\nconsole.log(a);\n")
      .unwrap();
    let c_specifier = Url::from_file_path(c_path).unwrap();

    let mut client = init("initialize_params.json");
    client
      .write_notification(
        "textDocument/didOpen",
        json!({
          "textDocument": {
            "uri": b_specifier,
            "languageId": "typescript",
            "version": 1,
            "text": r#"export * from "./a.ts";"#
          }
        }),
      )
      .unwrap();
    let (id, method, _) = client.read_request::<Value>().unwrap();
    assert_eq!(method, "workspace/configuration");
    client
      .write_response(id, json!([{ "enable": true }]))
      .unwrap();

    client
      .write_notification(
        "textDocument/didOpen",
        json!({
          "textDocument": {
            "uri": c_specifier,
            "languageId": "typescript",
            "version": 1,
            "text": "import { a } from \"./b.ts\";\nconsole.log(a);\n",
          }
        }),
      )
      .unwrap();
    let (id, method, _) = client.read_request::<Value>().unwrap();
    assert_eq!(method, "workspace/configuration");
    client
      .write_response(id, json!([{ "enable": true }]))
      .unwrap();

    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");
    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");
    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": c_specifier,
          },
          "position": {
            "line": 0,
            "character": 10
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value": "(alias) const a: \"a\"\nimport a"
          },
          ""
        ],
        "range": {
          "start": {
            "line": 0,
            "character": 9
          },
          "end": {
            "line": 0,
            "character": 10
          }
        }
      }))
    );
    client
      .write_notification(
        "textDocument/didClose",
        json!({
          "textDocument": {
            "uri": b_specifier,
          }
        }),
      )
      .unwrap();
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": c_specifier,
          },
          "position": {
            "line": 0,
            "character": 10
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value": "(alias) const a: \"a\"\nimport a"
          },
          ""
        ],
        "range": {
          "start": {
            "line": 0,
            "character": 9
          },
          "end": {
            "line": 0,
            "character": 10
          }
        }
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_hover_dependency() {
    let _g = http_server();
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file_01.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "export const a = \"a\";\n",
        }
      }),
    );
    did_open(
      &mut client,
      load_fixture("did_open_params_import_hover.json"),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "deno/cache",
        json!({
          "referrer": {
            "uri": "file:///a/file.ts",
          },
          "uris": [],
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "position": {
            "line": 0,
            "character": 28
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": {
          "kind": "markdown",
          "value": "**Resolved Dependency**\n\n**Code**: http&#8203;://127.0.0.1:4545/xTypeScriptTypes.js\n\n**Types**: http&#8203;://127.0.0.1:4545/xTypeScriptTypes.d.ts\n"
        },
        "range": {
          "start": {
            "line": 0,
            "character": 19
          },
          "end":{
            "line": 0,
            "character": 62
          }
        }
      }))
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "position": {
            "line": 3,
            "character": 28
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": {
          "kind": "markdown",
          "value": "**Resolved Dependency**\n\n**Code**: http&#8203;://127.0.0.1:4545/subdir/type_reference.js\n\n**Types**: http&#8203;://127.0.0.1:4545/subdir/type_reference.d.ts\n"
        },
        "range": {
          "start": {
            "line": 3,
            "character": 19
          },
          "end":{
            "line": 3,
            "character": 67
          }
        }
      }))
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "position": {
            "line": 4,
            "character": 28
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": {
          "kind": "markdown",
          "value": "**Resolved Dependency**\n\n**Code**: http&#8203;://127.0.0.1:4545/subdir/mod1.ts\n"
        },
        "range": {
          "start": {
            "line": 4,
            "character": 19
          },
          "end":{
            "line": 4,
            "character": 57
          }
        }
      }))
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "position": {
            "line": 5,
            "character": 28
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": {
          "kind": "markdown",
          "value": "**Resolved Dependency**\n\n**Code**: _(a data url)_\n"
        },
        "range": {
          "start": {
            "line": 5,
            "character": 19
          },
          "end":{
            "line": 5,
            "character": 132
          }
        }
      }))
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "position": {
            "line": 6,
            "character": 28
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": {
          "kind": "markdown",
          "value": "**Resolved Dependency**\n\n**Code**: file&#8203;:///a/file_01.ts\n"
        },
        "range": {
          "start": {
            "line": 6,
            "character": 19
          },
          "end":{
            "line": 6,
            "character": 33
          }
        }
      }))
    );
  }

  // This tests for a regression covered by denoland/deno#12753 where the lsp was
  // unable to resolve dependencies when there was an invalid syntax in the module
  #[test]
  fn lsp_hover_deps_preserved_when_invalid_parse() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file1.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "export type Foo = { bar(): string };\n"
        }
      }),
    );
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file2.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import { Foo } from './file1.ts'; declare const f: Foo; f\n"
        }
      }),
    );
    let (maybe_res, maybe_error) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file2.ts"
          },
          "position": {
            "line": 0,
            "character": 56
          }
        }),
      )
      .unwrap();
    assert!(maybe_error.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value": "const f: Foo",
          },
          ""
        ],
        "range": {
          "start": {
            "line": 0,
            "character": 56,
          },
          "end": {
            "line": 0,
            "character": 57,
          }
        }
      }))
    );
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file2.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 0,
                  "character": 57
                },
                "end": {
                  "line": 0,
                  "character": 58
                }
              },
              "text": "."
            }
          ]
        }),
      )
      .unwrap();
    let (maybe_res, maybe_error) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file2.ts"
          },
          "position": {
            "line": 0,
            "character": 56
          }
        }),
      )
      .unwrap();
    assert!(maybe_error.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value": "const f: Foo",
          },
          ""
        ],
        "range": {
          "start": {
            "line": 0,
            "character": 56,
          },
          "end": {
            "line": 0,
            "character": 57,
          }
        }
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_hover_typescript_types() {
    let _g = http_server();
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import * as a from \"http://127.0.0.1:4545/xTypeScriptTypes.js\";\n\nconsole.log(a.foo);\n",
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "deno/cache",
        json!({
          "referrer": {
            "uri": "file:///a/file.ts",
          },
          "uris": [
            {
              "uri": "http://127.0.0.1:4545/xTypeScriptTypes.js",
            }
          ],
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 24
          }
        }),
      )
      .unwrap();
    assert!(maybe_res.is_some());
    assert!(maybe_err.is_none());
    assert_eq!(
      json!(maybe_res.unwrap()),
      json!({
        "contents": {
          "kind": "markdown",
          "value": "**Resolved Dependency**\n\n**Code**: http&#8203;://127.0.0.1:4545/xTypeScriptTypes.js\n\n**Types**: http&#8203;://127.0.0.1:4545/xTypeScriptTypes.d.ts\n"
        },
        "range": {
          "start": {
            "line": 0,
            "character": 19
          },
          "end": {
            "line": 0,
            "character": 62
          }
        }
      })
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_hover_jsdoc_symbol_link() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/b.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "export function hello() {}\n"
        }
      }),
    );
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import { hello } from \"./b.ts\";\n\nhello();\n\nconst b = \"b\";\n\n/** JSDoc {@link hello} and {@linkcode b} */\nfunction a() {}\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 7,
            "character": 10
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": [
          {
            "language": "typescript",
            "value": "function a(): void"
          },
          "JSDoc [hello](file:///a/file.ts#L1,10) and [`b`](file:///a/file.ts#L5,7)"
        ],
        "range": {
          "start": {
            "line": 7,
            "character": 9
          },
          "end": {
            "line": 7,
            "character": 10
          }
        }
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_goto_type_definition() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "interface A {\n  a: string;\n}\n\nexport class B implements A {\n  a = \"a\";\n  log() {\n    console.log(this.a);\n  }\n}\n\nconst b = new B();\nb;\n",
        }
      }),
    );
    let (maybe_res, maybe_error) = client
      .write_request::<_, _, Value>(
        "textDocument/typeDefinition",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 12,
            "character": 1
          }
        }),
      )
      .unwrap();
    assert!(maybe_error.is_none());
    assert_eq!(
      maybe_res,
      Some(json!([
        {
          "targetUri": "file:///a/file.ts",
          "targetRange": {
            "start": {
              "line": 4,
              "character": 0
            },
            "end": {
              "line": 9,
              "character": 1
            }
          },
          "targetSelectionRange": {
            "start": {
              "line": 4,
              "character": 13
            },
            "end": {
              "line": 4,
              "character": 14
            }
          }
        }
      ]))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_call_hierarchy() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "function foo() {\n  return false;\n}\n\nclass Bar {\n  baz() {\n    return foo();\n  }\n}\n\nfunction main() {\n  const bar = new Bar();\n  bar.baz();\n}\n\nmain();"
        }
      }),
    );
    let (maybe_res, maybe_error) = client
      .write_request(
        "textDocument/prepareCallHierarchy",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 5,
            "character": 3
          }
        }),
      )
      .unwrap();
    assert!(maybe_error.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("prepare_call_hierarchy_response.json"))
    );
    let (maybe_res, maybe_error) = client
      .write_request(
        "callHierarchy/incomingCalls",
        load_fixture("incoming_calls_params.json"),
      )
      .unwrap();
    assert!(maybe_error.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("incoming_calls_response.json"))
    );
    let (maybe_res, maybe_error) = client
      .write_request(
        "callHierarchy/outgoingCalls",
        load_fixture("outgoing_calls_params.json"),
      )
      .unwrap();
    assert!(maybe_error.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("outgoing_calls_response.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_large_doc_changes() {
    let mut client = init("initialize_params.json");
    did_open(&mut client, load_fixture("did_open_params_large.json"));
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 444,
                  "character": 11
                },
                "end": {
                  "line": 444,
                  "character": 14
                }
              },
              "text": "+++"
            }
          ]
        }),
      )
      .unwrap();
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 445,
                  "character": 4
                },
                "end": {
                  "line": 445,
                  "character": 4
                }
              },
              "text": "// "
            }
          ]
        }),
      )
      .unwrap();
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 477,
                  "character": 4
                },
                "end": {
                  "line": 477,
                  "character": 9
                }
              },
              "text": "error"
            }
          ]
        }),
      )
      .unwrap();
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 421,
            "character": 30
          }
        }),
      )
      .unwrap();
    assert!(maybe_res.is_some());
    assert!(maybe_err.is_none());
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 444,
            "character": 6
          }
        }),
      )
      .unwrap();
    assert!(maybe_res.is_some());
    assert!(maybe_err.is_none());
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 461,
            "character": 34
          }
        }),
      )
      .unwrap();
    assert!(maybe_res.is_some());
    assert!(maybe_err.is_none());
    shutdown(&mut client);

    assert!(client.duration().as_millis() <= 15000);
  }

  #[test]
  fn lsp_document_symbol() {
    let mut client = init("initialize_params.json");
    did_open(&mut client, load_fixture("did_open_params_doc_symbol.json"));
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/documentSymbol",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("document_symbol_response.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_folding_range() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "// #region 1\n/*\n * Some comment\n */\nclass Foo {\n  bar(a, b) {\n    if (a === b) {\n      return true;\n    }\n    return false;\n  }\n}\n// #endregion"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/foldingRange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!([
        {
          "startLine": 0,
          "endLine": 12,
          "kind": "region"
        },
        {
          "startLine": 1,
          "endLine": 3,
          "kind": "comment"
        },
        {
          "startLine": 4,
          "endLine": 10
        },
        {
          "startLine": 5,
          "endLine": 9
        },
        {
          "startLine": 6,
          "endLine": 7
        }
      ]))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_rename() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          // this should not rename in comments and strings
          "text": "let variable = 'a'; // variable\nconsole.log(variable);\n\"variable\";\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/rename",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 4
          },
          "newName": "variable_modified"
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(load_fixture("rename_response.json")));
    shutdown(&mut client);
  }

  #[test]
  fn lsp_selection_range() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "class Foo {\n  bar(a, b) {\n    if (a === b) {\n      return true;\n    }\n    return false;\n  }\n}"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/selectionRange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "positions": [
            {
              "line": 2,
              "character": 8
            }
          ]
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("selection_range_response.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_semantic_tokens() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      load_fixture("did_open_params_semantic_tokens.json"),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/semanticTokens/full",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "data": [
          0, 5, 6, 1, 1, 0, 9, 6, 8, 9, 0, 8, 6, 8, 9, 2, 15, 3, 10, 5, 0, 4, 1,
          6, 1, 0, 12, 7, 2, 16, 1, 8, 1, 7, 41, 0, 4, 1, 6, 0, 0, 2, 5, 11, 16,
          1, 9, 1, 7, 40, 3, 10, 4, 2, 1, 1, 11, 1, 9, 9, 1, 2, 3, 11, 1, 3, 6, 3,
          0, 1, 0, 15, 4, 2, 0, 1, 30, 1, 6, 9, 1, 2, 3, 11,1, 1, 9, 9, 9, 3, 0,
          16, 3, 0, 0, 1, 17, 12, 11, 3, 0, 24, 3, 0, 0, 0, 4, 9, 9, 2
        ]
      }))
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/semanticTokens/range",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "range": {
            "start": {
              "line": 0,
              "character": 0
            },
            "end": {
              "line": 6,
              "character": 0
            }
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "data": [
          0, 5, 6, 1, 1, 0, 9, 6, 8, 9, 0, 8, 6, 8, 9, 2, 15, 3, 10, 5, 0, 4, 1,
          6, 1, 0, 12, 7, 2, 16, 1, 8, 1, 7, 41, 0, 4, 1, 6, 0, 0, 2, 5, 11, 16,
          1, 9, 1, 7, 40
        ]
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_code_lens() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "class A {\n  a = \"a\";\n\n  b() {\n    console.log(this.a);\n  }\n\n  c() {\n    this.a = \"c\";\n  }\n}\n\nconst a = new A();\na.b();\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeLens",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(load_fixture("code_lens_response.json")));
    let (maybe_res, maybe_err) = client
      .write_request(
        "codeLens/resolve",
        json!({
          "range": {
            "start": {
              "line": 0,
              "character": 6
            },
            "end": {
              "line": 0,
              "character": 7
            }
          },
          "data": {
            "specifier": "file:///a/file.ts",
            "source": "references"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_lens_resolve_response.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_code_lens_impl() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "interface A {\n  b(): void;\n}\n\nclass B implements A {\n  b() {\n    console.log(\"b\");\n  }\n}\n\ninterface C {\n  c: string;\n}\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeLens",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_lens_response_impl.json"))
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "codeLens/resolve",
        json!({
          "range": {
            "start": {
              "line": 0,
              "character": 10
            },
            "end": {
              "line": 0,
              "character": 11
            }
          },
          "data": {
            "specifier": "file:///a/file.ts",
            "source": "implementations"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_lens_resolve_response_impl.json"))
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "codeLens/resolve",
        json!({
          "range": {
            "start": {
              "line": 10,
              "character": 10
            },
            "end": {
              "line": 10,
              "character": 11
            }
          },
          "data": {
            "specifier": "file:///a/file.ts",
            "source": "implementations"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "range": {
          "start": {
            "line": 10,
            "character": 10
          },
          "end": {
            "line": 10,
            "character": 11
          }
        },
        "command": {
          "title": "0 implementations",
          "command": ""
        }
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_code_lens_test() {
    let mut client = init("initialize_params_code_lens_test.json");
    did_open(
      &mut client,
      load_fixture("did_open_params_test_code_lens.json"),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeLens",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_lens_response_test.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_code_lens_test_disabled() {
    let mut client = init("initialize_params_code_lens_test_disabled.json");
    client
      .write_notification(
        "textDocument/didOpen",
        load_fixture("did_open_params_test_code_lens.json"),
      )
      .unwrap();

    let (id, method, _) = client.read_request::<Value>().unwrap();
    assert_eq!(method, "workspace/configuration");
    client
      .write_response(
        id,
        json!([{
          "enable": true,
          "codeLens": {
            "test": false
          }
        }]),
      )
      .unwrap();

    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");
    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");
    let (method, _) = client.read_notification::<Value>().unwrap();
    assert_eq!(method, "textDocument/publishDiagnostics");
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeLens",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!([])));
    shutdown(&mut client);
  }

  #[test]
  fn lsp_code_lens_non_doc_nav_tree() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(Date.now());\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/references",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 3
          },
          "context": {
            "includeDeclaration": true
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "deno/virtualTextDocument",
        json!({
          "textDocument": {
            "uri": "deno:/asset/lib.deno.shared_globals.d.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Vec<lsp::CodeLens>>(
        "textDocument/codeLens",
        json!({
          "textDocument": {
            "uri": "deno:/asset/lib.deno.shared_globals.d.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let res = maybe_res.unwrap();
    assert!(res.len() > 50);
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, lsp::CodeLens>(
        "codeLens/resolve",
        json!({
          "range": {
            "start": {
              "line": 416,
              "character": 12
            },
            "end": {
              "line": 416,
              "character": 19
            }
          },
          "data": {
            "specifier": "asset:///lib.deno.shared_globals.d.ts",
            "source": "references"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    shutdown(&mut client);
  }

  #[test]
  fn lsp_nav_tree_updates() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "interface A {\n  b(): void;\n}\n\nclass B implements A {\n  b() {\n    console.log(\"b\");\n  }\n}\n\ninterface C {\n  c: string;\n}\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeLens",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_lens_response_impl.json"))
    );
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 10,
                  "character": 0
                },
                "end": {
                  "line": 13,
                  "character": 0
                }
              },
              "text": ""
            }
          ]
        }),
      )
      .unwrap();
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeLens",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_lens_response_changed.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_signature_help() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "/**\n * Adds two numbers.\n * @param a This is a first number.\n * @param b This is a second number.\n */\nfunction add(a: number, b: number) {\n  return a + b;\n}\n\nadd("
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/signatureHelp",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "character": 4,
            "line": 9
          },
          "context": {
            "triggerKind": 2,
            "triggerCharacter": "(",
            "isRetrigger": false
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "signatures": [
          {
            "label": "add(a: number, b: number): number",
            "documentation": {
              "kind": "markdown",
              "value": "Adds two numbers."
            },
            "parameters": [
              {
                "label": "a: number",
                "documentation": {
                  "kind": "markdown",
                  "value": "This is a first number."
                }
              },
              {
                "label": "b: number",
                "documentation": {
                  "kind": "markdown",
                  "value": "This is a second number."
                }
              }
            ]
          }
        ],
        "activeSignature": 0,
        "activeParameter": 0
      }))
    );
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 9,
                  "character": 4
                },
                "end": {
                  "line": 9,
                  "character": 4
                }
              },
              "text": "123, "
            }
          ]
        }),
      )
      .unwrap();
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/signatureHelp",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "character": 8,
            "line": 9
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "signatures": [
          {
            "label": "add(a: number, b: number): number",
            "documentation": {
              "kind": "markdown",
              "value": "Adds two numbers."
            },
            "parameters": [
              {
                "label": "a: number",
                "documentation": {
                  "kind": "markdown",
                  "value": "This is a first number."
                }
              },
              {
                "label": "b: number",
                "documentation": {
                  "kind": "markdown",
                  "value": "This is a second number."
                }
              }
            ]
          }
        ],
        "activeSignature": 0,
        "activeParameter": 1
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_code_actions() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "export function a(): void {\n  await Promise.resolve(\"a\");\n}\n\nexport function b(): void {\n  await Promise.resolve(\"b\");\n}\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeAction",
        load_fixture("code_action_params.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(load_fixture("code_action_response.json")));
    let (maybe_res, maybe_err) = client
      .write_request(
        "codeAction/resolve",
        load_fixture("code_action_resolve_params.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_action_resolve_response.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_code_actions_deno_cache() {
    let mut session = TestSession::from_file("initialize_params.json");
    let diagnostics = session.did_open(json!({
      "textDocument": {
        "uri": "file:///a/file.ts",
        "languageId": "typescript",
        "version": 1,
        "text": "import * as a from \"https://deno.land/x/a/mod.ts\";\n\nconsole.log(a);\n"
      }
    }));
    assert_eq!(
      diagnostics.with_source("deno"),
      load_fixture_as("diagnostics_deno_deps.json")
    );

    let (maybe_res, maybe_err) = session
      .client
      .write_request(
        "textDocument/codeAction",
        load_fixture("code_action_params_cache.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_action_response_cache.json"))
    );
    session.shutdown_and_exit();
  }

  #[test]
  fn lsp_code_actions_deno_cache_npm() {
    let mut session = TestSession::from_file("initialize_params.json");
    let diagnostics = session.did_open(json!({
      "textDocument": {
        "uri": "file:///a/file.ts",
        "languageId": "typescript",
        "version": 1,
        "text": "import chalk from \"npm:chalk\";\n\nconsole.log(chalk.green);\n"
      }
    }));
    assert_eq!(
      diagnostics.with_source("deno"),
      load_fixture_as("code_actions/cache_npm/diagnostics.json")
    );

    let (maybe_res, maybe_err) = session
      .client
      .write_request(
        "textDocument/codeAction",
        load_fixture("code_actions/cache_npm/cache_action.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_actions/cache_npm/cache_response.json"))
    );
    session.shutdown_and_exit();
  }

  #[test]
  fn lsp_code_actions_imports() {
    let mut session = TestSession::from_file("initialize_params.json");
    session.did_open(json!({
      "textDocument": {
        "uri": "file:///a/file00.ts",
        "languageId": "typescript",
        "version": 1,
        "text": r#"export interface MallardDuckConfigOptions extends DuckConfigOptions {
  kind: "mallard";
}

export class MallardDuckConfig extends DuckConfig {
  constructor(options: MallardDuckConfigOptions) {
    super(options);
  }
}
"#
      }
    }));
    session.did_open(json!({
      "textDocument": {
        "uri": "file:///a/file01.ts",
        "languageId": "typescript",
        "version": 1,
        "text": r#"import { DuckConfigOptions } from "./file02.ts";

export class DuckConfig {
  readonly kind;
  constructor(options: DuckConfigOptions) {
    this.kind = options.kind;
  }
}
"#
      }
    }));
    session.did_open(json!({
      "textDocument": {
        "uri": "file:///a/file02.ts",
        "languageId": "typescript",
        "version": 1,
        "text": r#"export interface DuckConfigOptions {
  kind: string;
  quacks: boolean;
}
"#
      }
    }));

    let (maybe_res, maybe_err) = session
      .client
      .write_request(
        "textDocument/codeAction",
        load_fixture("code_action_params_imports.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_action_response_imports.json"))
    );
    let (maybe_res, maybe_err) = session
      .client
      .write_request(
        "codeAction/resolve",
        load_fixture("code_action_resolve_params_imports.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_action_resolve_response_imports.json"))
    );

    session.shutdown_and_exit();
  }

  #[test]
  fn lsp_code_actions_refactor() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "var x: { a?: number; b?: string } = {};\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeAction",
        load_fixture("code_action_params_refactor.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_action_response_refactor.json"))
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "codeAction/resolve",
        load_fixture("code_action_resolve_params_refactor.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_action_resolve_response_refactor.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_code_actions_refactor_no_disabled_support() {
    let mut client = init("initialize_params_ca_no_disabled.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "interface A {\n  a: string;\n}\n\ninterface B {\n  b: string;\n}\n\nclass AB implements A, B {\n  a = \"a\";\n  b = \"b\";\n}\n\nnew AB().a;\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeAction",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "range": {
            "start": {
              "line": 0,
              "character": 0
            },
            "end": {
              "line": 14,
              "character": 0
            }
          },
          "context": {
            "diagnostics": [],
            "only": [
              "refactor"
            ]
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_action_response_no_disabled.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_code_actions_deadlock() {
    let mut client = init("initialize_params.json");
    client
      .write_notification(
        "textDocument/didOpen",
        load_fixture("did_open_params_large.json"),
      )
      .unwrap();
    let (id, method, _) = client.read_request::<Value>().unwrap();
    assert_eq!(method, "workspace/configuration");
    client
      .write_response(id, json!([{ "enable": true }]))
      .unwrap();
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/semanticTokens/full",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    read_diagnostics(&mut client);
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 444,
                  "character": 11
                },
                "end": {
                  "line": 444,
                  "character": 14
                }
              },
              "text": "+++"
            }
          ]
        }),
      )
      .unwrap();
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 445,
                  "character": 4
                },
                "end": {
                  "line": 445,
                  "character": 4
                }
              },
              "text": "// "
            }
          ]
        }),
      )
      .unwrap();
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 477,
                  "character": 4
                },
                "end": {
                  "line": 477,
                  "character": 9
                }
              },
              "text": "error"
            }
          ]
        }),
      )
      .unwrap();
    // diagnostics only trigger after changes have elapsed in a separate thread,
    // so we need to delay the next messages a little bit to attempt to create a
    // potential for a deadlock with the codeAction
    std::thread::sleep(std::time::Duration::from_millis(50));
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "position": {
            "line": 609,
            "character": 33,
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/codeAction",
        load_fixture("code_action_params_deadlock.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());

    read_diagnostics(&mut client);

    shutdown(&mut client);
  }

  #[test]
  fn lsp_completions() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "Deno."
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 5
          },
          "context": {
            "triggerKind": 2,
            "triggerCharacter": "."
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
      assert!(!list.is_incomplete);
      assert!(list.items.len() > 90);
    } else {
      panic!("unexpected response");
    }
    let (maybe_res, maybe_err) = client
      .write_request(
        "completionItem/resolve",
        load_fixture("completion_resolve_params.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("completion_resolve_response.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_completions_private_fields() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": r#"class Foo { #myProperty = "value"; constructor() { this.# } }"#
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 57
          },
          "context": {
            "triggerKind": 1
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
      assert_eq!(list.items.len(), 1);
      let item = &list.items[0];
      assert_eq!(item.label, "#myProperty");
      assert!(!list.is_incomplete);
    } else {
      panic!("unexpected response");
    }
    shutdown(&mut client);
  }

  #[test]
  fn lsp_completions_optional() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "interface A {\n  b?: string;\n}\n\nconst o: A = {};\n\nfunction c(s: string) {}\n\nc(o.)"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        load_fixture("completion_request_params_optional.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "isIncomplete": false,
        "items": [
          {
            "label": "b?",
            "kind": 5,
            "sortText": "11",
            "filterText": "b",
            "insertText": "b",
            "commitCharacters": [".", ",", ";", "("],
            "data": {
              "tsc": {
                "specifier": "file:///a/file.ts",
                "position": 79,
                "name": "b",
                "useCodeSnippet": false
              }
            }
          }
        ]
      }))
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "completionItem/resolve",
        load_fixture("completion_resolve_params_optional.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "label": "b?",
        "kind": 5,
        "detail": "(property) A.b?: string | undefined",
        "documentation": {
          "kind": "markdown",
          "value": ""
        },
        "sortText": "1",
        "filterText": "b",
        "insertText": "b"
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_completions_auto_import() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/b.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "export const foo = \"foo\";\n",
        }
      }),
    );
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "export {};\n\n",
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 2,
            "character": 0,
          },
          "context": {
            "triggerKind": 1,
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
      assert!(!list.is_incomplete);
      if !list.items.iter().any(|item| item.label == "foo") {
        panic!("completions items missing 'foo' symbol");
      }
    } else {
      panic!("unexpected completion response");
    }
    let (maybe_res, maybe_err) = client
      .write_request(
        "completionItem/resolve",
        json!({
          "label": "foo",
          "kind": 6,
          "sortText": "￿16",
          "commitCharacters": [
            ".",
            ",",
            ";",
            "("
          ],
          "data": {
            "tsc": {
              "specifier": "file:///a/file.ts",
              "position": 12,
              "name": "foo",
              "source": "./b",
              "data": {
                "exportName": "foo",
                "moduleSpecifier": "./b",
                "fileName": "file:///a/b.ts"
              },
              "useCodeSnippet": false
            }
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "label": "foo",
        "kind": 6,
        "detail": "const foo: \"foo\"",
        "documentation": {
          "kind": "markdown",
          "value": ""
        },
        "sortText": "￿16",
        "additionalTextEdits": [
          {
            "range": {
              "start": {
                "line": 0,
                "character": 0
              },
              "end": {
                "line": 0,
                "character": 0
              }
            },
            "newText": "import { foo } from \"./b.ts\";\n\n"
          }
        ]
      }))
    );
  }

  #[test]
  fn lsp_completions_snippet() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/a.tsx",
          "languageId": "typescriptreact",
          "version": 1,
          "text": "function A({ type }: { type: string }) {\n  return type;\n}\n\nfunction B() {\n  return <A t\n}",
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": "file:///a/a.tsx"
          },
          "position": {
            "line": 5,
            "character": 13,
          },
          "context": {
            "triggerKind": 1,
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
      assert!(!list.is_incomplete);
      assert_eq!(
        json!(list),
        json!({
          "isIncomplete": false,
          "items": [
            {
              "label": "type",
              "kind": 5,
              "sortText": "11",
              "filterText": "type=\"$1\"",
              "insertText": "type=\"$1\"",
              "insertTextFormat": 2,
              "commitCharacters": [
                ".",
                ",",
                ";",
                "("
              ],
              "data": {
                "tsc": {
                  "specifier": "file:///a/a.tsx",
                  "position": 87,
                  "name": "type",
                  "useCodeSnippet": false
                }
              }
            }
          ]
        })
      );
    } else {
      panic!("unexpected completion response");
    }
    let (maybe_res, maybe_err) = client
      .write_request(
        "completionItem/resolve",
        json!({
          "label": "type",
          "kind": 5,
          "sortText": "11",
          "filterText": "type=\"$1\"",
          "insertText": "type=\"$1\"",
          "insertTextFormat": 2,
          "commitCharacters": [
            ".",
            ",",
            ";",
            "("
          ],
          "data": {
            "tsc": {
              "specifier": "file:///a/a.tsx",
              "position": 87,
              "name": "type",
              "useCodeSnippet": false
            }
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "label": "type",
        "kind": 5,
        "detail": "(property) type: string",
        "documentation": {
          "kind": "markdown",
          "value": ""
        },
        "sortText": "11",
        "filterText": "type=\"$1\"",
        "insertText": "type=\"$1\"",
        "insertTextFormat": 2
      }))
    );
  }

  #[test]
  fn lsp_completions_no_snippet() {
    let mut client = init("initialize_params_no_snippet.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/a.tsx",
          "languageId": "typescriptreact",
          "version": 1,
          "text": "function A({ type }: { type: string }) {\n  return type;\n}\n\nfunction B() {\n  return <A t\n}",
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": "file:///a/a.tsx"
          },
          "position": {
            "line": 5,
            "character": 13,
          },
          "context": {
            "triggerKind": 1,
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
      assert!(!list.is_incomplete);
      assert_eq!(
        json!(list),
        json!({
          "isIncomplete": false,
          "items": [
            {
              "label": "type",
              "kind": 5,
              "sortText": "11",
              "commitCharacters": [
                ".",
                ",",
                ";",
                "("
              ],
              "data": {
                "tsc": {
                  "specifier": "file:///a/a.tsx",
                  "position": 87,
                  "name": "type",
                  "useCodeSnippet": false
                }
              }
            }
          ]
        })
      );
    } else {
      panic!("unexpected completion response");
    }
  }

  #[test]
  fn lsp_completions_npm() {
    let _g = http_server();
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import cjsDefault from 'npm:@denotest/cjs-default-export';import chalk from 'npm:chalk';\n\n",
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "deno/cache",
        json!({
          "referrer": {
            "uri": "file:///a/file.ts",
          },
          "uris": [
            {
              "uri": "npm:@denotest/cjs-default-export",
            },
            {
              "uri": "npm:chalk",
            }
          ]
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());

    // check importing a cjs default import
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 2,
                  "character": 0
                },
                "end": {
                  "line": 2,
                  "character": 0
                }
              },
              "text": "cjsDefault."
            }
          ]
        }),
      )
      .unwrap();
    read_diagnostics(&mut client);

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 2,
            "character": 11
          },
          "context": {
            "triggerKind": 2,
            "triggerCharacter": "."
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
      assert!(!list.is_incomplete);
      assert_eq!(list.items.len(), 3);
      assert!(list.items.iter().any(|i| i.label == "default"));
      assert!(list.items.iter().any(|i| i.label == "MyClass"));
    } else {
      panic!("unexpected response");
    }
    let (maybe_res, maybe_err) = client
      .write_request(
        "completionItem/resolve",
        load_fixture("completions/npm/resolve_params.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("completions/npm/resolve_response.json"))
    );

    // now check chalk, which is esm
    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
            "version": 3
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 2,
                  "character": 0
                },
                "end": {
                  "line": 2,
                  "character": 11
                }
              },
              "text": "chalk."
            }
          ]
        }),
      )
      .unwrap();
    read_diagnostics(&mut client);

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 2,
            "character": 6
          },
          "context": {
            "triggerKind": 2,
            "triggerCharacter": "."
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
      assert!(!list.is_incomplete);
      assert!(list.items.iter().any(|i| i.label == "green"));
      assert!(list.items.iter().any(|i| i.label == "red"));
    } else {
      panic!("unexpected response");
    }

    shutdown(&mut client);
  }

  #[test]
  fn lsp_npm_specifier_unopened_file() {
    let _g = http_server();
    let mut client = init("initialize_params.json");

    // create other.ts, which re-exports an npm specifier
    client.deno_dir().write(
      "other.ts",
      "export { default as chalk } from 'npm:chalk@5';",
    );

    // cache the other.ts file to the DENO_DIR
    let deno = deno_cmd_with_deno_dir(client.deno_dir())
      .current_dir(client.deno_dir().path())
      .arg("cache")
      .arg("--quiet")
      .arg("other.ts")
      .envs(env_vars_for_npm_tests())
      .stdout(Stdio::piped())
      .stderr(Stdio::piped())
      .spawn()
      .unwrap();
    let output = deno.wait_with_output().unwrap();
    assert!(output.status.success());
    assert_eq!(output.status.code(), Some(0));

    let stdout = String::from_utf8(output.stdout).unwrap();
    assert!(stdout.is_empty());
    let stderr = String::from_utf8(output.stderr).unwrap();
    assert!(stderr.is_empty());

    // open main.ts, which imports other.ts (unopened)
    let main_url =
      ModuleSpecifier::from_file_path(client.deno_dir().path().join("main.ts"))
        .unwrap();
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": main_url,
          "languageId": "typescript",
          "version": 1,
          "text": "import { chalk } from './other.ts';\n\n",
        }
      }),
    );

    client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": main_url,
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 2,
                  "character": 0
                },
                "end": {
                  "line": 2,
                  "character": 0
                }
              },
              "text": "chalk."
            }
          ]
        }),
      )
      .unwrap();
    read_diagnostics(&mut client);

    // now ensure completions work
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": main_url
          },
          "position": {
            "line": 2,
            "character": 6
          },
          "context": {
            "triggerKind": 2,
            "triggerCharacter": "."
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
      assert!(!list.is_incomplete);
      assert_eq!(list.items.len(), 63);
      assert!(list.items.iter().any(|i| i.label == "ansi256"));
    } else {
      panic!("unexpected response");
    }
  }

  #[test]
  fn lsp_completions_registry() {
    let _g = http_server();
    let mut client = init("initialize_params_registry.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import * as a from \"http://localhost:4545/x/a@\""
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 46
          },
          "context": {
            "triggerKind": 2,
            "triggerCharacter": "@"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
      assert!(!list.is_incomplete);
      assert_eq!(list.items.len(), 3);
    } else {
      panic!("unexpected response");
    }
    let (maybe_res, maybe_err) = client
      .write_request(
        "completionItem/resolve",
        load_fixture("completion_resolve_params_registry.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("completion_resolve_response_registry.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_completions_registry_empty() {
    let _g = http_server();
    let mut client = init("initialize_params_registry.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import * as a from \"\""
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 20
          },
          "context": {
            "triggerKind": 2,
            "triggerCharacter": "\""
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("completion_request_response_empty.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_auto_discover_registry() {
    let _g = http_server();
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import * as a from \"http://localhost:4545/x/a@\""
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 46
          },
          "context": {
            "triggerKind": 2,
            "triggerCharacter": "@"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let (method, maybe_res) = client.read_notification().unwrap();
    assert_eq!(method, "deno/registryState");
    assert_eq!(
      maybe_res,
      Some(json!({
        "origin": "http://localhost:4545",
        "suggestions": true,
      }))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_cache_location() {
    let _g = http_server();
    let temp_dir = TempDir::new();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params_registry.json"))
        .unwrap();

    params.root_uri = Some(Url::from_file_path(temp_dir.path()).unwrap());
    if let Some(Value::Object(mut map)) = params.initialization_options {
      map.insert("cache".to_string(), json!(".cache"));
      params.initialization_options = Some(Value::Object(map));
    }

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();
    client.write_notification("initialized", json!({})).unwrap();
    let mut session = TestSession::from_client(client);

    session.did_open(json!({
      "textDocument": {
        "uri": "file:///a/file_01.ts",
        "languageId": "typescript",
        "version": 1,
        "text": "export const a = \"a\";\n",
      }
    }));
    let diagnostics =
      session.did_open(load_fixture("did_open_params_import_hover.json"));
    assert_eq!(diagnostics.viewed().len(), 7);
    let (maybe_res, maybe_err) = session
      .client
      .write_request::<_, _, Value>(
        "deno/cache",
        json!({
          "referrer": {
            "uri": "file:///a/file.ts",
          },
          "uris": [],
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let (maybe_res, maybe_err) = session
      .client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "position": {
            "line": 0,
            "character": 28
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": {
          "kind": "markdown",
          "value": "**Resolved Dependency**\n\n**Code**: http&#8203;://127.0.0.1:4545/xTypeScriptTypes.js\n\n**Types**: http&#8203;://127.0.0.1:4545/xTypeScriptTypes.d.ts\n"
        },
        "range": {
          "start": {
            "line": 0,
            "character": 19
          },
          "end":{
            "line": 0,
            "character": 62
          }
        }
      }))
    );
    let (maybe_res, maybe_err) = session
      .client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "position": {
            "line": 7,
            "character": 28
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": {
          "kind": "markdown",
          "value": "**Resolved Dependency**\n\n**Code**: http&#8203;://localhost:4545/x/a/mod.ts\n\n\n---\n\n**a**\n\nmod.ts"
        },
        "range": {
          "start": {
            "line": 7,
            "character": 19
          },
          "end": {
            "line": 7,
            "character": 53
          }
        }
      }))
    );
    let cache_path = temp_dir.path().join(".cache");
    assert!(cache_path.is_dir());
    assert!(cache_path.join("gen").is_dir());
    session.shutdown_and_exit();
  }

  /// Sets the TLS root certificate on startup, which allows the LSP to connect to
  /// the custom signed test server and be able to retrieve the registry config
  /// and cache files.
  #[test]
  fn lsp_tls_cert() {
    let _g = http_server();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params_tls_cert.json"))
        .unwrap();

    params.root_uri = Some(Url::from_file_path(testdata_path()).unwrap());

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();
    client.write_notification("initialized", json!({})).unwrap();
    let mut session = TestSession::from_client(client);

    session.did_open(json!({
      "textDocument": {
        "uri": "file:///a/file_01.ts",
        "languageId": "typescript",
        "version": 1,
        "text": "export const a = \"a\";\n",
      }
    }));
    let diagnostics =
      session.did_open(load_fixture("did_open_params_tls_cert.json"));
    let diagnostics = diagnostics.viewed();
    assert_eq!(diagnostics.len(), 7);
    let (maybe_res, maybe_err) = session
      .client
      .write_request::<_, _, Value>(
        "deno/cache",
        json!({
          "referrer": {
            "uri": "file:///a/file.ts",
          },
          "uris": [],
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let (maybe_res, maybe_err) = session
      .client
      .write_request(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "position": {
            "line": 0,
            "character": 28
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": {
          "kind": "markdown",
          "value": "**Resolved Dependency**\n\n**Code**: https&#8203;://localhost:5545/xTypeScriptTypes.js\n"
        },
        "range": {
          "start": {
            "line": 0,
            "character": 19
          },
          "end":{
            "line": 0,
            "character": 63
          }
        }
      }))
    );
    let (maybe_res, maybe_err) = session
      .client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts",
          },
          "position": {
            "line": 7,
            "character": 28
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": {
          "kind": "markdown",
          "value": "**Resolved Dependency**\n\n**Code**: http&#8203;://localhost:4545/x/a/mod.ts\n\n\n---\n\n**a**\n\nmod.ts"
        },
        "range": {
          "start": {
            "line": 7,
            "character": 19
          },
          "end": {
            "line": 7,
            "character": 53
          }
        }
      }))
    );
    session.shutdown_and_exit();
  }

  #[test]
  fn lsp_diagnostics_warn_redirect() {
    let _g = http_server();
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import * as a from \"http://127.0.0.1:4545/x_deno_warning.js\";\n\nconsole.log(a)\n",
        },
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "deno/cache",
        json!({
          "referrer": {
            "uri": "file:///a/file.ts",
          },
          "uris": [
            {
              "uri": "http://127.0.0.1:4545/x_deno_warning.js",
            }
          ],
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let diagnostics = read_diagnostics(&mut client);
    assert_eq!(
    diagnostics.with_source("deno"),
    lsp::PublishDiagnosticsParams {
      uri: Url::parse("file:///a/file.ts").unwrap(),
      diagnostics: vec![
        lsp::Diagnostic {
          range: lsp::Range {
            start: lsp::Position {
              line: 0,
              character: 19
            },
            end: lsp::Position {
              line: 0,
              character: 60
            }
          },
          severity: Some(lsp::DiagnosticSeverity::WARNING),
          code: Some(lsp::NumberOrString::String("deno-warn".to_string())),
          source: Some("deno".to_string()),
          message: "foobar".to_string(),
          ..Default::default()
        },
        lsp::Diagnostic {
          range: lsp::Range {
            start: lsp::Position {
              line: 0,
              character: 19
            },
            end: lsp::Position {
              line: 0,
              character: 60
            }
          },
          severity: Some(lsp::DiagnosticSeverity::INFORMATION),
          code: Some(lsp::NumberOrString::String("redirect".to_string())),
          source: Some("deno".to_string()),
          message: "The import of \"http://127.0.0.1:4545/x_deno_warning.js\" was redirected to \"http://127.0.0.1:4545/lsp/x_deno_warning_redirect.js\".".to_string(),
          data: Some(json!({"specifier": "http://127.0.0.1:4545/x_deno_warning.js", "redirect": "http://127.0.0.1:4545/lsp/x_deno_warning_redirect.js"})),
          ..Default::default()
        }
      ],
      version: Some(1),
    }
  );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_redirect_quick_fix() {
    let _g = http_server();
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import * as a from \"http://127.0.0.1:4545/x_deno_warning.js\";\n\nconsole.log(a)\n",
        },
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "deno/cache",
        json!({
          "referrer": {
            "uri": "file:///a/file.ts",
          },
          "uris": [
            {
              "uri": "http://127.0.0.1:4545/x_deno_warning.js",
            }
          ],
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let diagnostics = read_diagnostics(&mut client)
      .with_source("deno")
      .diagnostics;
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeAction",
        json!(json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "range": {
            "start": {
              "line": 0,
              "character": 19
            },
            "end": {
              "line": 0,
              "character": 60
            }
          },
          "context": {
            "diagnostics": diagnostics,
            "only": [
              "quickfix"
            ]
          }
        })),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_action_redirect_response.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_diagnostics_deprecated() {
    let mut client = init("initialize_params.json");
    let diagnostics = did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "/** @deprecated */\nexport const a = \"a\";\n\na;\n",
        },
      }),
    );
    assert_eq!(
      json!(diagnostics),
      json!([
        {
          "uri": "file:///a/file.ts",
          "diagnostics": [],
          "version": 1
        },
        {
          "uri": "file:///a/file.ts",
          "diagnostics": [],
          "version": 1
        },
        {
          "uri": "file:///a/file.ts",
          "diagnostics": [
            {
              "range": {
                "start": {
                  "line": 3,
                  "character": 0
                },
                "end": {
                  "line": 3,
                  "character": 1
                }
              },
              "severity": 4,
              "code": 6385,
              "source": "deno-ts",
              "message": "'a' is deprecated.",
              "relatedInformation": [],
              "tags": [
                2
              ]
            }
          ],
          "version": 1
        }
      ])
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_diagnostics_deno_types() {
    let mut client = init("initialize_params.json");
    client
      .write_notification(
        "textDocument/didOpen",
        load_fixture("did_open_params_deno_types.json"),
      )
      .unwrap();
    let (id, method, _) = client.read_request::<Value>().unwrap();
    assert_eq!(method, "workspace/configuration");
    client
      .write_response(id, json!([{ "enable": true }]))
      .unwrap();
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/documentSymbol",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          }
        }),
      )
      .unwrap();
    assert!(maybe_res.is_some());
    assert!(maybe_err.is_none());
    let diagnostics = read_diagnostics(&mut client);
    assert_eq!(diagnostics.viewed().len(), 5);
    shutdown(&mut client);
  }

  #[test]
  fn lsp_diagnostics_refresh_dependents() {
    let mut session = TestSession::from_file("initialize_params.json");
    session.did_open(json!({
      "textDocument": {
        "uri": "file:///a/file_00.ts",
        "languageId": "typescript",
        "version": 1,
        "text": "export const a = \"a\";\n",
      },
    }));
    session.did_open(json!({
      "textDocument": {
        "uri": "file:///a/file_01.ts",
        "languageId": "typescript",
        "version": 1,
        "text": "export * from \"./file_00.ts\";\n",
      },
    }));
    let diagnostics = session.did_open(json!({
      "textDocument": {
        "uri": "file:///a/file_02.ts",
        "languageId": "typescript",
        "version": 1,
        "text": "import { a, b } from \"./file_01.ts\";\n\nconsole.log(a, b);\n"
      }
    }));
    assert_eq!(
      json!(diagnostics.with_file_and_source("file:///a/file_02.ts", "deno-ts")),
      json!({
        "uri": "file:///a/file_02.ts",
        "diagnostics": [
          {
            "range": {
              "start": {
                "line": 0,
                "character": 12
              },
              "end": {
                "line": 0,
                "character": 13
              }
            },
            "severity": 1,
            "code": 2305,
            "source": "deno-ts",
            "message": "Module '\"./file_01.ts\"' has no exported member 'b'."
          }
        ],
        "version": 1
      })
    );

    // fix the code causing the diagnostic
    session
      .client
      .write_notification(
        "textDocument/didChange",
        json!({
          "textDocument": {
            "uri": "file:///a/file_00.ts",
            "version": 2
          },
          "contentChanges": [
            {
              "range": {
                "start": {
                  "line": 1,
                  "character": 0
                },
                "end": {
                  "line": 1,
                  "character": 0
                }
              },
              "text": "export const b = \"b\";\n"
            }
          ]
        }),
      )
      .unwrap();
    let diagnostics = session.read_diagnostics();
    assert_eq!(diagnostics.viewed().len(), 0); // no diagnostics now

    session.shutdown_and_exit();
    assert_eq!(session.client.queue_len(), 0);
  }

  #[derive(Deserialize)]
  #[serde(rename_all = "camelCase")]
  pub struct PerformanceAverage {
    pub name: String,
    pub count: u32,
    pub average_duration: u32,
  }

  #[derive(Deserialize)]
  #[serde(rename_all = "camelCase")]
  struct PerformanceAverages {
    averages: Vec<PerformanceAverage>,
  }

  #[test]
  fn lsp_performance() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "console.log(Deno.args);\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 19
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, PerformanceAverages>(
        "deno/performance",
        json!(null),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    if let Some(res) = maybe_res {
      assert_eq!(res.averages.len(), 13);
    } else {
      panic!("unexpected result");
    }
    shutdown(&mut client);
  }

  #[test]
  fn lsp_format_no_changes() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "console;\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/formatting",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "options": {
            "tabSize": 2,
            "insertSpaces": true
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!(null)));
    client.assert_no_notification("window/showMessage");
    shutdown(&mut client);
  }

  #[test]
  fn lsp_format_error() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "console test test\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/formatting",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "options": {
            "tabSize": 2,
            "insertSpaces": true
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!(null)));
    shutdown(&mut client);
  }

  #[test]
  fn lsp_format_mbc() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "const bar = '👍🇺🇸😃'\nconsole.log('hello deno')\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/formatting",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "options": {
            "tabSize": 2,
            "insertSpaces": true
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!(load_fixture("formatting_mbc_response.json")))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_format_exclude_with_config() {
    let temp_dir = TempDir::new();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    let deno_fmt_jsonc =
      serde_json::to_vec_pretty(&load_fixture("deno.fmt.exclude.jsonc"))
        .unwrap();
    fs::write(temp_dir.path().join("deno.fmt.jsonc"), deno_fmt_jsonc).unwrap();

    params.root_uri = Some(Url::from_file_path(temp_dir.path()).unwrap());
    if let Some(Value::Object(mut map)) = params.initialization_options {
      map.insert("config".to_string(), json!("./deno.fmt.jsonc"));
      params.initialization_options = Some(Value::Object(map));
    }

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    let file_uri =
      ModuleSpecifier::from_file_path(temp_dir.path().join("ignored.ts"))
        .unwrap()
        .to_string();
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": file_uri,
          "languageId": "typescript",
          "version": 1,
          "text": "function   myFunc(){}"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/formatting",
        json!({
          "textDocument": {
            "uri": file_uri
          },
          "options": {
            "tabSize": 2,
            "insertSpaces": true
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!(null)));
    shutdown(&mut client);
  }

  #[test]
  fn lsp_format_exclude_default_config() {
    let temp_dir = TempDir::new();
    let workspace_root = temp_dir.path().canonicalize().unwrap();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    let deno_jsonc =
      serde_json::to_vec_pretty(&load_fixture("deno.fmt.exclude.jsonc"))
        .unwrap();
    fs::write(workspace_root.join("deno.jsonc"), deno_jsonc).unwrap();

    params.root_uri =
      Some(Url::from_file_path(workspace_root.clone()).unwrap());

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    let file_uri =
      ModuleSpecifier::from_file_path(workspace_root.join("ignored.ts"))
        .unwrap()
        .to_string();
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": file_uri,
          "languageId": "typescript",
          "version": 1,
          "text": "function   myFunc(){}"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/formatting",
        json!({
          "textDocument": {
            "uri": file_uri
          },
          "options": {
            "tabSize": 2,
            "insertSpaces": true
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!(null)));
    shutdown(&mut client);
  }

  #[test]
  fn lsp_format_json() {
    let mut client = init("initialize_params.json");
    client
      .write_notification(
        "textDocument/didOpen",
        json!({
          "textDocument": {
            // Also test out using a non-json file extension here.
            // What should matter is the language identifier.
            "uri": "file:///a/file.lock",
            "languageId": "json",
            "version": 1,
            "text": "{\"key\":\"value\"}"
          }
        }),
      )
      .unwrap();

    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/formatting",
        json!({
            "textDocument": {
              "uri": "file:///a/file.lock"
            },
            "options": {
              "tabSize": 2,
              "insertSpaces": true
            }
        }),
      )
      .unwrap();

    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!([
        {
          "range": {
            "start": {
              "line": 0,
              "character": 1
            },
            "end": {
              "line": 0,
              "character": 1
            }
          },
          "newText": " "
        },
        {
          "range": {
            "start": { "line": 0, "character": 7 },
            "end": { "line": 0, "character": 7 }
          },
          "newText": " "
        },
        {
          "range": {
            "start": { "line": 0, "character": 14 },
            "end": { "line": 0, "character": 15 }
          },
          "newText": " }\n"
        }
      ]))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_json_no_diagnostics() {
    let mut client = init("initialize_params.json");
    client
      .write_notification(
        "textDocument/didOpen",
        json!({
          "textDocument": {
            "uri": "file:///a/file.json",
            "languageId": "json",
            "version": 1,
            "text": "{\"key\":\"value\"}"
          }
        }),
      )
      .unwrap();

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/semanticTokens/full",
        json!({
          "textDocument": {
            "uri": "file:///a/file.json"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!(null)));

    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.json"
          },
          "position": {
            "line": 0,
            "character": 3
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!(null)));

    shutdown(&mut client);
  }

  #[test]
  fn lsp_format_markdown() {
    let mut client = init("initialize_params.json");
    client
      .write_notification(
        "textDocument/didOpen",
        json!({
          "textDocument": {
            "uri": "file:///a/file.md",
            "languageId": "markdown",
            "version": 1,
            "text": "#   Hello World"
          }
        }),
      )
      .unwrap();

    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/formatting",
        json!({
          "textDocument": {
            "uri": "file:///a/file.md"
          },
          "options": {
            "tabSize": 2,
            "insertSpaces": true
          }
        }),
      )
      .unwrap();

    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!([
        {
          "range": {
            "start": { "line": 0, "character": 1 },
            "end": { "line": 0, "character": 3 }
          },
          "newText": ""
        },
        {
          "range": {
            "start": { "line": 0, "character": 15 },
            "end": { "line": 0, "character": 15 }
          },
          "newText": "\n"
        }
      ]))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_format_with_config() {
    let temp_dir = TempDir::new();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    let deno_fmt_jsonc =
      serde_json::to_vec_pretty(&load_fixture("deno.fmt.jsonc")).unwrap();
    fs::write(temp_dir.path().join("deno.fmt.jsonc"), deno_fmt_jsonc).unwrap();

    params.root_uri = Some(Url::from_file_path(temp_dir.path()).unwrap());
    if let Some(Value::Object(mut map)) = params.initialization_options {
      map.insert("config".to_string(), json!("./deno.fmt.jsonc"));
      params.initialization_options = Some(Value::Object(map));
    }

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    client
    .write_notification(
      "textDocument/didOpen",
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "export async function someVeryLongFunctionName() {\nconst response = fetch(\"http://localhost:4545/some/non/existent/path.json\");\nconsole.log(response.text());\nconsole.log(\"finished!\")\n}"
        }
      }),
    )
    .unwrap();

    // The options below should be ignored in favor of configuration from config file.
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/formatting",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "options": {
            "tabSize": 2,
            "insertSpaces": true
          }
        }),
      )
      .unwrap();

    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!([{
          "range": {
            "start": {
              "line": 1,
              "character": 0
            },
            "end": {
              "line": 1,
              "character": 0
            }
          },
          "newText": "\t"
        },
        {
          "range": {
            "start": {
              "line": 1,
              "character": 23
            },
            "end": {
              "line": 1,
              "character": 24
            }
          },
          "newText": "\n\t\t'"
        },
        {
          "range": {
            "start": {
              "line": 1,
              "character": 73
            },
            "end": {
              "line": 1,
              "character": 74
            }
          },
          "newText": "',\n\t"
        },
        {
          "range": {
            "start": {
              "line": 2,
              "character": 0
            },
            "end": {
              "line": 2,
              "character": 0
            }
          },
          "newText": "\t"
        },
        {
          "range": {
            "start": {
              "line": 3,
              "character": 0
            },
            "end": {
              "line": 3,
              "character": 0
            }
          },
          "newText": "\t"
        },
        {
          "range": {
            "start": {
              "line": 3,
              "character": 12
            },
            "end": {
              "line": 3,
              "character": 13
            }
          },
          "newText": "'"
        },
        {
          "range": {
            "start": {
              "line": 3,
              "character": 22
            },
            "end": {
              "line": 3,
              "character": 24
            }
          },
          "newText": "');"
        },
        {
          "range": {
            "start": {
              "line": 4,
              "character": 1
            },
            "end": {
              "line": 4,
              "character": 1
            }
          },
          "newText": "\n"
        }]
      ))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_markdown_no_diagnostics() {
    let mut client = init("initialize_params.json");
    client
      .write_notification(
        "textDocument/didOpen",
        json!({
          "textDocument": {
            "uri": "file:///a/file.md",
            "languageId": "markdown",
            "version": 1,
            "text": "# Hello World"
          }
        }),
      )
      .unwrap();

    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/semanticTokens/full",
        json!({
          "textDocument": {
            "uri": "file:///a/file.md"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!(null)));

    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.md"
          },
          "position": {
            "line": 0,
            "character": 3
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(maybe_res, Some(json!(null)));

    shutdown(&mut client);
  }

  #[test]
  fn lsp_configuration_did_change() {
    let _g = http_server();
    let mut client = init("initialize_params_did_config_change.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "import * as a from \"http://localhost:4545/x/a@\""
        }
      }),
    );
    client
      .write_notification(
        "workspace/didChangeConfiguration",
        json!({
          "settings": {}
        }),
      )
      .unwrap();
    let (id, method, _) = client.read_request::<Value>().unwrap();
    assert_eq!(method, "workspace/configuration");
    client
      .write_response(
        id,
        json!([{
          "enable": true,
          "codeLens": {
            "implementations": true,
            "references": true
          },
          "importMap": null,
          "lint": true,
          "suggest": {
            "autoImports": true,
            "completeFunctionCalls": false,
            "names": true,
            "paths": true,
            "imports": {
              "hosts": {
                "http://localhost:4545/": true
              }
            }
          },
          "unstable": false
        }]),
      )
      .unwrap();
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/completion",
        json!({
          "textDocument": {
            "uri": "file:///a/file.ts"
          },
          "position": {
            "line": 0,
            "character": 46
          },
          "context": {
            "triggerKind": 2,
            "triggerCharacter": "@"
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
      assert!(!list.is_incomplete);
      assert_eq!(list.items.len(), 3);
    } else {
      panic!("unexpected response");
    }
    let (maybe_res, maybe_err) = client
      .write_request(
        "completionItem/resolve",
        load_fixture("completion_resolve_params_registry.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("completion_resolve_response_registry.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_workspace_symbol() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "export class A {\n  fieldA: string;\n  fieldB: string;\n}\n",
        }
      }),
    );
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file_01.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "export class B {\n  fieldC: string;\n  fieldD: string;\n}\n",
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "workspace/symbol",
        json!({
          "query": "field"
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!([
        {
          "name": "fieldA",
          "kind": 8,
          "location": {
            "uri": "file:///a/file.ts",
            "range": {
              "start": {
                "line": 1,
                "character": 2
              },
              "end": {
                "line": 1,
                "character": 17
              }
            }
          },
          "containerName": "A"
        },
        {
          "name": "fieldB",
          "kind": 8,
          "location": {
            "uri": "file:///a/file.ts",
            "range": {
              "start": {
                "line": 2,
                "character": 2
              },
              "end": {
                "line": 2,
                "character": 17
              }
            }
          },
          "containerName": "A"
        },
        {
          "name": "fieldC",
          "kind": 8,
          "location": {
            "uri": "file:///a/file_01.ts",
            "range": {
              "start": {
                "line": 1,
                "character": 2
              },
              "end": {
                "line": 1,
                "character": 17
              }
            }
          },
          "containerName": "B"
        },
        {
          "name": "fieldD",
          "kind": 8,
          "location": {
            "uri": "file:///a/file_01.ts",
            "range": {
              "start": {
                "line": 2,
                "character": 2
              },
              "end": {
                "line": 2,
                "character": 17
              }
            }
          },
          "containerName": "B"
        }
      ]))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_code_actions_ignore_lint() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text": "let message = 'Hello, Deno!';\nconsole.log(message);\n"
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeAction",
        load_fixture("code_action_ignore_lint_params.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_action_ignore_lint_response.json"))
    );
    shutdown(&mut client);
  }

  /// This test exercises updating an existing deno-lint-ignore-file comment.
  #[test]
  fn lsp_code_actions_update_ignore_lint() {
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.ts",
          "languageId": "typescript",
          "version": 1,
          "text":
"#!/usr/bin/env -S deno run
// deno-lint-ignore-file camelcase
let snake_case = 'Hello, Deno!';
console.log(snake_case);
",
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request(
        "textDocument/codeAction",
        load_fixture("code_action_update_ignore_lint_params.json"),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(load_fixture("code_action_update_ignore_lint_response.json"))
    );
    shutdown(&mut client);
  }

  #[test]
  fn lsp_lint_with_config() {
    let temp_dir = TempDir::new();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    let deno_lint_jsonc =
      serde_json::to_vec_pretty(&load_fixture("deno.lint.jsonc")).unwrap();
    fs::write(temp_dir.path().join("deno.lint.jsonc"), deno_lint_jsonc)
      .unwrap();

    params.root_uri = Some(Url::from_file_path(temp_dir.path()).unwrap());
    if let Some(Value::Object(mut map)) = params.initialization_options {
      map.insert("config".to_string(), json!("./deno.lint.jsonc"));
      params.initialization_options = Some(Value::Object(map));
    }

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();
    let mut session = TestSession::from_client(client);

    let diagnostics = session.did_open(load_fixture("did_open_lint.json"));
    let diagnostics = diagnostics.viewed();
    assert_eq!(diagnostics.len(), 1);
    assert_eq!(
      diagnostics[0].code,
      Some(lsp::NumberOrString::String("ban-untagged-todo".to_string()))
    );
    session.shutdown_and_exit();
  }

  #[test]
  fn lsp_lint_exclude_with_config() {
    let temp_dir = TempDir::new();
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    let deno_lint_jsonc =
      serde_json::to_vec_pretty(&load_fixture("deno.lint.exclude.jsonc"))
        .unwrap();
    fs::write(temp_dir.path().join("deno.lint.jsonc"), deno_lint_jsonc)
      .unwrap();

    params.root_uri = Some(Url::from_file_path(temp_dir.path()).unwrap());
    if let Some(Value::Object(mut map)) = params.initialization_options {
      map.insert("config".to_string(), json!("./deno.lint.jsonc"));
      params.initialization_options = Some(Value::Object(map));
    }

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    let diagnostics = did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": ModuleSpecifier::from_file_path(temp_dir.path().join("ignored.ts")).unwrap().to_string(),
          "languageId": "typescript",
          "version": 1,
          "text": "// TODO: fixme\nexport async function non_camel_case() {\nconsole.log(\"finished!\")\n}"
        }
      }),
    );
    let diagnostics = diagnostics
      .into_iter()
      .flat_map(|x| x.diagnostics)
      .collect::<Vec<_>>();
    assert_eq!(diagnostics, Vec::new());
    shutdown(&mut client);
  }

  #[test]
  fn lsp_jsx_import_source_pragma() {
    let _g = http_server();
    let mut client = init("initialize_params.json");
    did_open(
      &mut client,
      json!({
        "textDocument": {
          "uri": "file:///a/file.tsx",
          "languageId": "typescriptreact",
          "version": 1,
          "text":
"/** @jsxImportSource http://localhost:4545/jsx */

function A() {
  return \"hello\";
}

export function B() {
  return <A></A>;
}
",
        }
      }),
    );
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "deno/cache",
        json!({
          "referrer": {
            "uri": "file:///a/file.tsx",
          },
          "uris": [
            {
              "uri": "http://127.0.0.1:4545/jsx/jsx-runtime",
            }
          ],
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let (maybe_res, maybe_err) = client
      .write_request::<_, _, Value>(
        "textDocument/hover",
        json!({
          "textDocument": {
            "uri": "file:///a/file.tsx"
          },
          "position": {
            "line": 0,
            "character": 25
          }
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert_eq!(
      maybe_res,
      Some(json!({
        "contents": {
          "kind": "markdown",
          "value": "**Resolved Dependency**\n\n**Code**: http&#8203;://localhost:4545/jsx/jsx-runtime\n",
        },
        "range": {
          "start": {
            "line": 0,
            "character": 21
          },
          "end": {
            "line": 0,
            "character": 46
          }
        }
      }))
    );
    shutdown(&mut client);
  }

  #[derive(Debug, Clone, Deserialize, PartialEq)]
  #[serde(rename_all = "camelCase")]
  struct TestData {
    id: String,
    label: String,
    steps: Option<Vec<TestData>>,
    range: Option<lsp::Range>,
  }

  #[derive(Debug, Deserialize, PartialEq)]
  #[serde(rename_all = "camelCase")]
  enum TestModuleNotificationKind {
    Insert,
    Replace,
  }

  #[derive(Debug, Deserialize)]
  #[serde(rename_all = "camelCase")]
  struct TestModuleNotificationParams {
    text_document: lsp::TextDocumentIdentifier,
    kind: TestModuleNotificationKind,
    label: String,
    tests: Vec<TestData>,
  }

  #[derive(Debug, Deserialize)]
  #[serde(rename_all = "camelCase")]
  struct EnqueuedTestModule {
    text_document: lsp::TextDocumentIdentifier,
    ids: Vec<String>,
  }

  #[derive(Debug, Deserialize)]
  #[serde(rename_all = "camelCase")]
  struct TestRunResponseParams {
    enqueued: Vec<EnqueuedTestModule>,
  }

  #[test]
  fn lsp_testing_api() {
    let mut params: lsp::InitializeParams =
      serde_json::from_value(load_fixture("initialize_params.json")).unwrap();
    let temp_dir = TempDir::new();

    let root_specifier =
      ensure_directory_specifier(Url::from_file_path(temp_dir.path()).unwrap());

    let module_path = temp_dir.path().join("./test.ts");
    let specifier = ModuleSpecifier::from_file_path(&module_path).unwrap();
    let contents = r#"
Deno.test({
  name: "test a",
  fn() {
    console.log("test a");
  }
});
"#;
    fs::write(&module_path, contents).unwrap();
    fs::write(temp_dir.path().join("./deno.jsonc"), r#"{}"#).unwrap();

    params.root_uri = Some(root_specifier);

    let deno_exe = deno_exe_path();
    let mut client = LspClient::new(&deno_exe, false).unwrap();
    client
      .write_request::<_, _, Value>("initialize", params)
      .unwrap();

    client.write_notification("initialized", json!({})).unwrap();

    client
      .write_notification(
        "textDocument/didOpen",
        json!({
          "textDocument": {
            "uri": specifier,
            "languageId": "typescript",
            "version": 1,
            "text": contents,
          }
        }),
      )
      .unwrap();

    handle_configuration_request(
      &mut client,
      json!([{
        "enable": true,
        "codeLens": {
          "test": true
        }
      }]),
    );

    for _ in 0..4 {
      let result = client.read_notification::<Value>();
      assert!(result.is_ok());
      let (method, notification) = result.unwrap();
      if method.as_str() == "deno/testModule" {
        let params: TestModuleNotificationParams =
          serde_json::from_value(notification.unwrap()).unwrap();
        assert_eq!(params.text_document.uri, specifier);
        assert_eq!(params.kind, TestModuleNotificationKind::Replace);
        assert_eq!(params.label, "test.ts");
        assert_eq!(params.tests.len(), 1);
        let test = &params.tests[0];
        assert_eq!(test.label, "test a");
        assert!(test.steps.is_none());
        assert_eq!(
          test.range,
          Some(lsp::Range {
            start: lsp::Position {
              line: 1,
              character: 5,
            },
            end: lsp::Position {
              line: 1,
              character: 9,
            }
          })
        );
      }
    }

    let (maybe_res, maybe_err) = client
      .write_request::<_, _, TestRunResponseParams>(
        "deno/testRun",
        json!({
          "id": 1,
          "kind": "run",
        }),
      )
      .unwrap();
    assert!(maybe_err.is_none());
    assert!(maybe_res.is_some());
    let res = maybe_res.unwrap();
    assert_eq!(res.enqueued.len(), 1);
    assert_eq!(res.enqueued[0].text_document.uri, specifier);
    assert_eq!(res.enqueued[0].ids.len(), 1);
    let id = res.enqueued[0].ids[0].clone();

    let res = client.read_notification::<Value>();
    assert!(res.is_ok());
    let (method, notification) = res.unwrap();
    assert_eq!(method, "deno/testRunProgress");
    assert_eq!(
      notification,
      Some(json!({
        "id": 1,
        "message": {
          "type": "started",
          "test": {
            "textDocument": {
              "uri": specifier,
            },
            "id": id,
          },
        }
      }))
    );

    let res = client.read_notification::<Value>();
    assert!(res.is_ok());
    let (method, notification) = res.unwrap();
    assert_eq!(method, "deno/testRunProgress");
    let notification_value = notification
      .as_ref()
      .unwrap()
      .as_object()
      .unwrap()
      .get("message")
      .unwrap()
      .as_object()
      .unwrap()
      .get("value")
      .unwrap()
      .as_str()
      .unwrap();
    // deno test's output capturing flushes with a zero-width space in order to
    // synchronize the output pipes. Occassionally this zero width space
    // might end up in the output so strip it from the output comparison here.
    assert_eq!(notification_value.replace('\u{200B}', ""), "test a\r\n");
    assert_eq!(
      notification,
      Some(json!({
        "id": 1,
        "message": {
          "type": "output",
          "value": notification_value,
          "test": {
            "textDocument": {
              "uri": specifier,
            },
            "id": id,
          },
        }
      }))
    );

    let res = client.read_notification::<Value>();
    assert!(res.is_ok());
    let (method, notification) = res.unwrap();
    assert_eq!(method, "deno/testRunProgress");
    let notification = notification.unwrap();
    let obj = notification.as_object().unwrap();
    assert_eq!(obj.get("id"), Some(&json!(1)));
    let message = obj.get("message").unwrap().as_object().unwrap();
    match message.get("type").and_then(|v| v.as_str()) {
      Some("passed") => {
        assert_eq!(
          message.get("test"),
          Some(&json!({
            "textDocument": {
              "uri": specifier
            },
            "id": id,
          }))
        );
        assert!(message.contains_key("duration"));

        let res = client.read_notification::<Value>();
        assert!(res.is_ok());
        let (method, notification) = res.unwrap();
        assert_eq!(method, "deno/testRunProgress");
        assert_eq!(
          notification,
          Some(json!({
            "id": 1,
            "message": {
              "type": "end",
            }
          }))
        );
      }
      // sometimes on windows, the messages come out of order, but it actually is
      // working, so if we do get the end before the passed, we will simply let
      // the test pass
      Some("end") => (),
      _ => panic!("unexpected message {}", json!(notification)),
    }

    shutdown(&mut client);
  }
}