denoland-deno/cli/tests/inspector_tests.rs

// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.

use deno_core::futures;
use deno_core::futures::prelude::*;
use deno_core::futures::stream::SplitSink;
use deno_core::serde_json;
use deno_core::url;
use deno_runtime::deno_fetch::reqwest;
use deno_runtime::deno_websocket::tokio_tungstenite;
use deno_runtime::deno_websocket::tokio_tungstenite::tungstenite;
use std::io::BufRead;
use std::pin::Pin;
use test_util as util;
use tokio::net::TcpStream;

mod inspector {
  use super::*;

  macro_rules! assert_starts_with {
  ($string:expr, $($test:expr),+) => {
    let string = $string; // This might be a function call or something
    if !($(string.starts_with($test))||+) {
      panic!("{:?} does not start with {:?}", string, [$($test),+]);
    }
  }
}

  fn inspect_flag_with_unique_port(flag_prefix: &str) -> String {
    use std::sync::atomic::{AtomicU16, Ordering};
    static PORT: AtomicU16 = AtomicU16::new(9229);
    let port = PORT.fetch_add(1, Ordering::Relaxed);
    format!("{}=127.0.0.1:{}", flag_prefix, port)
  }

  fn extract_ws_url_from_stderr(
    stderr_lines: &mut impl std::iter::Iterator<Item = String>,
  ) -> url::Url {
    let stderr_first_line = skip_check_line(stderr_lines);
    assert_starts_with!(&stderr_first_line, "Debugger listening on ");
    let v: Vec<_> = stderr_first_line.match_indices("ws:").collect();
    assert_eq!(v.len(), 1);
    let ws_url_index = v[0].0;
    let ws_url = &stderr_first_line[ws_url_index..];
    url::Url::parse(ws_url).unwrap()
  }

  fn skip_check_line(
    stderr_lines: &mut impl std::iter::Iterator<Item = String>,
  ) -> String {
    loop {
      let mut line = stderr_lines.next().unwrap();
      line = util::strip_ansi_codes(&line).to_string();

      if line.starts_with("Check") {
        continue;
      }

      return line;
    }
  }

  fn assert_stderr(
    stderr_lines: &mut impl std::iter::Iterator<Item = String>,
    expected_lines: &[&str],
  ) {
    let mut expected_index = 0;

    loop {
      let line = skip_check_line(stderr_lines);

      assert_eq!(line, expected_lines[expected_index]);
      expected_index += 1;

      if expected_index >= expected_lines.len() {
        break;
      }
    }
  }

  fn assert_stderr_for_inspect(
    stderr_lines: &mut impl std::iter::Iterator<Item = String>,
  ) {
    assert_stderr(
      stderr_lines,
      &["Visit chrome://inspect to connect to the debugger."],
    );
  }

  fn assert_stderr_for_inspect_brk(
    stderr_lines: &mut impl std::iter::Iterator<Item = String>,
  ) {
    assert_stderr(
      stderr_lines,
      &[
        "Visit chrome://inspect to connect to the debugger.",
        "Deno is waiting for debugger to connect.",
      ],
    );
  }

  async fn assert_inspector_messages(
    socket_tx: &mut SplitSink<
      tokio_tungstenite::WebSocketStream<
        tokio_tungstenite::MaybeTlsStream<TcpStream>,
      >,
      tungstenite::Message,
    >,
    messages: &[&str],
    socket_rx: &mut Pin<Box<dyn Stream<Item = String>>>,
    responses: &[&str],
    notifications: &[&str],
  ) {
    for msg in messages {
      socket_tx.send(msg.to_string().into()).await.unwrap();
    }

    let expected_messages = responses.len() + notifications.len();
    let mut responses_idx = 0;
    let mut notifications_idx = 0;

    for _ in 0..expected_messages {
      let msg = socket_rx.next().await.unwrap();

      if msg.starts_with(r#"{"id":"#) {
        assert!(
          msg.starts_with(responses[responses_idx]),
          "Doesn't start with {}, instead received {}",
          responses[responses_idx],
          msg
        );
        responses_idx += 1;
      } else {
        assert!(
          msg.starts_with(notifications[notifications_idx]),
          "Doesn't start with {}, instead received {}",
          notifications[notifications_idx],
          msg
        );
        notifications_idx += 1;
      }
    }
  }

  #[tokio::test]
  async fn inspector_connect() {
    let script = util::testdata_path().join("inspector/inspector1.js");
    let mut child = util::deno_cmd()
      .arg("run")
      .arg(inspect_flag_with_unique_port("--inspect"))
      .arg(script)
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let ws_url = extract_ws_url_from_stderr(&mut stderr_lines);

    // We use tokio_tungstenite as a websocket client because warp (which is
    // a dependency of Deno) uses it.
    let (_socket, response) =
      tokio_tungstenite::connect_async(ws_url).await.unwrap();
    assert_eq!("101 Switching Protocols", response.status().to_string());
    child.kill().unwrap();
    child.wait().unwrap();
  }

  #[tokio::test]
  async fn inspector_break_on_first_line() {
    let script = util::testdata_path().join("inspector/inspector2.js");
    let mut child = util::deno_cmd()
      .arg("run")
      .arg(inspect_flag_with_unique_port("--inspect-brk"))
      .arg(script)
      .stdout(std::process::Stdio::piped())
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let ws_url = extract_ws_url_from_stderr(&mut stderr_lines);

    let (socket, response) =
      tokio_tungstenite::connect_async(ws_url).await.unwrap();
    assert_eq!(response.status(), 101); // Switching protocols.

    let (mut socket_tx, socket_rx) = socket.split();
    let mut socket_rx = socket_rx
      .map(|msg| msg.unwrap().to_string())
      .filter(|msg| {
        let pass = !msg.starts_with(r#"{"method":"Debugger.scriptParsed","#);
        futures::future::ready(pass)
      })
      .boxed_local();

    let stdout = child.stdout.as_mut().unwrap();
    let mut stdout_lines =
      std::io::BufReader::new(stdout).lines().map(|r| r.unwrap());

    assert_stderr_for_inspect_brk(&mut stderr_lines);

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":1,"method":"Runtime.enable"}"#,
      r#"{"id":2,"method":"Debugger.enable"}"#,
    ],
    &mut socket_rx,
    &[
      r#"{"id":1,"result":{}}"#,
      r#"{"id":2,"result":{"debuggerId":"#,
    ],
    &[
      r#"{"method":"Runtime.executionContextCreated","params":{"context":{"id":1,"#,
    ],
  )
  .await;

    assert_inspector_messages(
      &mut socket_tx,
      &[r#"{"id":3,"method":"Runtime.runIfWaitingForDebugger"}"#],
      &mut socket_rx,
      &[r#"{"id":3,"result":{}}"#],
      &[r#"{"method":"Debugger.paused","#],
    )
    .await;

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":4,"method":"Runtime.evaluate","params":{"expression":"Deno.core.print(\"hello from the inspector\\n\")","contextId":1,"includeCommandLineAPI":true,"silent":false,"returnByValue":true}}"#,
    ],
    &mut socket_rx,
    &[r#"{"id":4,"result":{"result":{"type":"undefined"}}}"#],
    &[],
  )
  .await;

    assert_eq!(&stdout_lines.next().unwrap(), "hello from the inspector");

    assert_inspector_messages(
      &mut socket_tx,
      &[r#"{"id":5,"method":"Debugger.resume"}"#],
      &mut socket_rx,
      &[r#"{"id":5,"result":{}}"#],
      &[],
    )
    .await;

    assert_eq!(&stdout_lines.next().unwrap(), "hello from the script");

    child.kill().unwrap();
    child.wait().unwrap();
  }

  #[tokio::test]
  async fn inspector_pause() {
    let script = util::testdata_path().join("inspector/inspector1.js");
    let mut child = util::deno_cmd()
      .arg("run")
      .arg(inspect_flag_with_unique_port("--inspect"))
      .arg(script)
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let ws_url = extract_ws_url_from_stderr(&mut stderr_lines);

    // We use tokio_tungstenite as a websocket client because warp (which is
    // a dependency of Deno) uses it.
    let (mut socket, _) =
      tokio_tungstenite::connect_async(ws_url).await.unwrap();

    /// Returns the next websocket message as a string ignoring
    /// Debugger.scriptParsed messages.
    async fn ws_read_msg(
      socket: &mut tokio_tungstenite::WebSocketStream<
        tokio_tungstenite::MaybeTlsStream<tokio::net::TcpStream>,
      >,
    ) -> String {
      use deno_core::futures::stream::StreamExt;
      while let Some(msg) = socket.next().await {
        let msg = msg.unwrap().to_string();
        // FIXME(bartlomieju): fails because there's a file loaded
        // called 150_errors.js
        // assert!(!msg.contains("error"));
        if !msg.contains("Debugger.scriptParsed") {
          return msg;
        }
      }
      unreachable!()
    }

    socket
      .send(r#"{"id":6,"method":"Debugger.enable"}"#.into())
      .await
      .unwrap();

    let msg = ws_read_msg(&mut socket).await;
    println!("response msg 1 {}", msg);
    assert_starts_with!(msg, r#"{"id":6,"result":{"debuggerId":"#);

    socket
      .send(r#"{"id":31,"method":"Debugger.pause"}"#.into())
      .await
      .unwrap();

    let msg = ws_read_msg(&mut socket).await;
    println!("response msg 2 {}", msg);
    assert_eq!(msg, r#"{"id":31,"result":{}}"#);

    child.kill().unwrap();
  }

  #[tokio::test]
  async fn inspector_port_collision() {
    // Skip this test on WSL, which allows multiple processes to listen on the
    // same port, rather than making `bind()` fail with `EADDRINUSE`.
    if cfg!(target_os = "linux")
      && std::env::var_os("WSL_DISTRO_NAME").is_some()
    {
      return;
    }

    let script = util::testdata_path().join("inspector/inspector1.js");
    let inspect_flag = inspect_flag_with_unique_port("--inspect");

    let mut child1 = util::deno_cmd()
      .arg("run")
      .arg(&inspect_flag)
      .arg(script.clone())
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr_1 = child1.stderr.as_mut().unwrap();
    let mut stderr_1_lines = std::io::BufReader::new(stderr_1)
      .lines()
      .map(|r| r.unwrap());
    let _ = extract_ws_url_from_stderr(&mut stderr_1_lines);

    let mut child2 = util::deno_cmd()
      .arg("run")
      .arg(&inspect_flag)
      .arg(script)
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr_2 = child2.stderr.as_mut().unwrap();
    let stderr_2_error_message = std::io::BufReader::new(stderr_2)
      .lines()
      .map(|r| r.unwrap())
      .inspect(|line| assert!(!line.contains("Debugger listening")))
      .find(|line| line.contains("Cannot start inspector server"));
    assert!(stderr_2_error_message.is_some());

    child1.kill().unwrap();
    child1.wait().unwrap();
    child2.wait().unwrap();
  }

  #[tokio::test]
  async fn inspector_does_not_hang() {
    let script = util::testdata_path().join("inspector/inspector3.js");
    let mut child = util::deno_cmd()
      .arg("run")
      .arg(inspect_flag_with_unique_port("--inspect-brk"))
      .env("NO_COLOR", "1")
      .arg(script)
      .stdout(std::process::Stdio::piped())
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let ws_url = extract_ws_url_from_stderr(&mut stderr_lines);

    let (socket, response) =
      tokio_tungstenite::connect_async(ws_url).await.unwrap();
    assert_eq!(response.status(), 101); // Switching protocols.

    let (mut socket_tx, socket_rx) = socket.split();
    let mut socket_rx = socket_rx
      .map(|msg| msg.unwrap().to_string())
      .filter(|msg| {
        let pass = !msg.starts_with(r#"{"method":"Debugger.scriptParsed","#);
        futures::future::ready(pass)
      })
      .boxed_local();

    let stdout = child.stdout.as_mut().unwrap();
    let mut stdout_lines =
      std::io::BufReader::new(stdout).lines().map(|r| r.unwrap());

    assert_stderr_for_inspect_brk(&mut stderr_lines);

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":1,"method":"Runtime.enable"}"#,
      r#"{"id":2,"method":"Debugger.enable"}"#,
    ],
    &mut socket_rx,
    &[
      r#"{"id":1,"result":{}}"#,
      r#"{"id":2,"result":{"debuggerId":"#
    ],
    &[
      r#"{"method":"Runtime.executionContextCreated","params":{"context":{"id":1,"#
    ],
  )
  .await;

    assert_inspector_messages(
      &mut socket_tx,
      &[r#"{"id":3,"method":"Runtime.runIfWaitingForDebugger"}"#],
      &mut socket_rx,
      &[r#"{"id":3,"result":{}}"#],
      &[r#"{"method":"Debugger.paused","#],
    )
    .await;

    assert_inspector_messages(
      &mut socket_tx,
      &[r#"{"id":4,"method":"Debugger.resume"}"#],
      &mut socket_rx,
      &[r#"{"id":4,"result":{}}"#],
      &[r#"{"method":"Debugger.resumed","params":{}}"#],
    )
    .await;

    for i in 0..128u32 {
      let request_id = i + 10;
      // Expect the number {i} on stdout.
      let s = i.to_string();
      assert_eq!(stdout_lines.next().unwrap(), s);

      assert_inspector_messages(
        &mut socket_tx,
        &[],
        &mut socket_rx,
        &[],
        &[
          r#"{"method":"Runtime.consoleAPICalled","#,
          r#"{"method":"Debugger.paused","#,
        ],
      )
      .await;

      assert_inspector_messages(
        &mut socket_tx,
        &[&format!(
          r#"{{"id":{},"method":"Debugger.resume"}}"#,
          request_id
        )],
        &mut socket_rx,
        &[&format!(r#"{{"id":{},"result":{{}}}}"#, request_id)],
        &[r#"{"method":"Debugger.resumed","params":{}}"#],
      )
      .await;
    }

    // Check that we can gracefully close the websocket connection.
    socket_tx.close().await.unwrap();
    socket_rx.for_each(|_| async {}).await;

    assert_eq!(&stdout_lines.next().unwrap(), "done");
    assert!(child.wait().unwrap().success());
  }

  #[tokio::test]
  async fn inspector_without_brk_runs_code() {
    let script = util::testdata_path().join("inspector/inspector4.js");
    let mut child = util::deno_cmd()
      .arg("run")
      .arg(inspect_flag_with_unique_port("--inspect"))
      .arg(script)
      .stdout(std::process::Stdio::piped())
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let _ = extract_ws_url_from_stderr(&mut stderr_lines);

    // Check that inspector actually runs code without waiting for inspector
    // connection.
    let stdout = child.stdout.as_mut().unwrap();
    let mut stdout_lines =
      std::io::BufReader::new(stdout).lines().map(|r| r.unwrap());
    let stdout_first_line = stdout_lines.next().unwrap();
    assert_eq!(stdout_first_line, "hello");

    child.kill().unwrap();
    child.wait().unwrap();
  }

  #[tokio::test]
  async fn inspector_runtime_evaluate_does_not_crash() {
    let mut child = util::deno_cmd()
      .arg("repl")
      .arg(inspect_flag_with_unique_port("--inspect"))
      .stdin(std::process::Stdio::piped())
      .stdout(std::process::Stdio::piped())
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines = std::io::BufReader::new(stderr)
      .lines()
      .map(|r| r.unwrap())
      .filter(|s| s.as_str() != "Debugger session started.");
    let ws_url = extract_ws_url_from_stderr(&mut stderr_lines);

    let (socket, response) =
      tokio_tungstenite::connect_async(ws_url).await.unwrap();
    assert_eq!(response.status(), 101); // Switching protocols.

    let (mut socket_tx, socket_rx) = socket.split();
    let mut socket_rx = socket_rx
      .map(|msg| msg.unwrap().to_string())
      .filter(|msg| {
        let pass = !msg.starts_with(r#"{"method":"Debugger.scriptParsed","#);
        futures::future::ready(pass)
      })
      .boxed_local();

    let stdin = child.stdin.take().unwrap();

    let stdout = child.stdout.as_mut().unwrap();
    let mut stdout_lines = std::io::BufReader::new(stdout)
      .lines()
      .map(|r| r.unwrap())
      .filter(|s| !s.starts_with("Deno "));

    assert_stderr_for_inspect(&mut stderr_lines);

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":1,"method":"Runtime.enable"}"#,
      r#"{"id":2,"method":"Debugger.enable"}"#,
    ],
    &mut socket_rx,
    &[
      r#"{"id":1,"result":{}}"#,
      r#"{"id":2,"result":{"debuggerId":"#,
    ],
    &[
      r#"{"method":"Runtime.executionContextCreated","params":{"context":{"id":1,"#,
    ],
  )
  .await;

    assert_eq!(
      &stdout_lines.next().unwrap(),
      "exit using ctrl+d, ctrl+c, or close()"
    );

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":3,"method":"Runtime.compileScript","params":{"expression":"Deno.cwd()","sourceURL":"","persistScript":false,"executionContextId":1}}"#,
    ],
    &mut socket_rx,
    &[r#"{"id":3,"result":{}}"#], &[]
  ).await;

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":4,"method":"Runtime.evaluate","params":{"expression":"Deno.cwd()","objectGroup":"console","includeCommandLineAPI":true,"silent":false,"contextId":1,"returnByValue":true,"generatePreview":true,"userGesture":true,"awaitPromise":false,"replMode":true}}"#,
    ],
    &mut socket_rx,
    &[r#"{"id":4,"result":{"result":{"type":"string","value":""#],
    &[],
  ).await;

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":5,"method":"Runtime.evaluate","params":{"expression":"console.error('done');","objectGroup":"console","includeCommandLineAPI":true,"silent":false,"contextId":1,"returnByValue":true,"generatePreview":true,"userGesture":true,"awaitPromise":false,"replMode":true}}"#,
    ],
    &mut socket_rx,
    &[r#"{"id":5,"result":{"result":{"type":"undefined"}}}"#],
    &[r#"{"method":"Runtime.consoleAPICalled"#],
  ).await;

    assert_eq!(&stderr_lines.next().unwrap(), "done");

    drop(stdin);
    child.wait().unwrap();
  }

  #[tokio::test]
  async fn inspector_json() {
    let script = util::testdata_path().join("inspector/inspector1.js");
    let mut child = util::deno_cmd()
      .arg("run")
      .arg(inspect_flag_with_unique_port("--inspect"))
      .arg(script)
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let ws_url = extract_ws_url_from_stderr(&mut stderr_lines);
    let mut url = ws_url.clone();
    let _ = url.set_scheme("http");
    url.set_path("/json");
    let resp = reqwest::get(url).await.unwrap();
    assert_eq!(resp.status(), reqwest::StatusCode::OK);
    let endpoint_list: Vec<deno_core::serde_json::Value> =
      serde_json::from_str(&resp.text().await.unwrap()).unwrap();
    let matching_endpoint = endpoint_list
      .iter()
      .find(|e| e["webSocketDebuggerUrl"] == ws_url.as_str());
    assert!(matching_endpoint.is_some());
    child.kill().unwrap();
  }

  #[tokio::test]
  async fn inspector_json_list() {
    let script = util::testdata_path().join("inspector/inspector1.js");
    let mut child = util::deno_cmd()
      .arg("run")
      .arg(inspect_flag_with_unique_port("--inspect"))
      .arg(script)
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let ws_url = extract_ws_url_from_stderr(&mut stderr_lines);
    let mut url = ws_url.clone();
    let _ = url.set_scheme("http");
    url.set_path("/json/list");
    let resp = reqwest::get(url).await.unwrap();
    assert_eq!(resp.status(), reqwest::StatusCode::OK);
    let endpoint_list: Vec<deno_core::serde_json::Value> =
      serde_json::from_str(&resp.text().await.unwrap()).unwrap();
    let matching_endpoint = endpoint_list
      .iter()
      .find(|e| e["webSocketDebuggerUrl"] == ws_url.as_str());
    assert!(matching_endpoint.is_some());
    child.kill().unwrap();
  }

  #[tokio::test]
  async fn inspector_connect_non_ws() {
    // https://github.com/denoland/deno/issues/11449
    // Verify we don't panic if non-WS connection is being established
    let script = util::testdata_path().join("inspector/inspector1.js");
    let mut child = util::deno_cmd()
      .arg("run")
      .arg(inspect_flag_with_unique_port("--inspect"))
      .arg(script)
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let mut ws_url = extract_ws_url_from_stderr(&mut stderr_lines);
    // Change scheme to URL and try send a request. We're not interested
    // in the request result, just that the process doesn't panic.
    ws_url.set_scheme("http").unwrap();
    let resp = reqwest::get(ws_url).await.unwrap();
    assert_eq!("400 Bad Request", resp.status().to_string());
    child.kill().unwrap();
    child.wait().unwrap();
  }

  #[tokio::test]
  #[ignore] // https://github.com/denoland/deno/issues/13491
  async fn inspector_break_on_first_line_in_test() {
    let script = util::testdata_path().join("inspector/inspector_test.js");
    let mut child = util::deno_cmd()
      .arg("test")
      .arg(inspect_flag_with_unique_port("--inspect-brk"))
      .arg(script)
      .stdout(std::process::Stdio::piped())
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let ws_url = extract_ws_url_from_stderr(&mut stderr_lines);

    let (socket, response) =
      tokio_tungstenite::connect_async(ws_url).await.unwrap();
    assert_eq!(response.status(), 101); // Switching protocols.

    let (mut socket_tx, socket_rx) = socket.split();
    let mut socket_rx = socket_rx
      .map(|msg| msg.unwrap().to_string())
      .filter(|msg| {
        let pass = !msg.starts_with(r#"{"method":"Debugger.scriptParsed","#);
        futures::future::ready(pass)
      })
      .boxed_local();

    let stdout = child.stdout.as_mut().unwrap();
    let mut stdout_lines =
      std::io::BufReader::new(stdout).lines().map(|r| r.unwrap());

    assert_stderr_for_inspect_brk(&mut stderr_lines);

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":1,"method":"Runtime.enable"}"#,
      r#"{"id":2,"method":"Debugger.enable"}"#,
    ],
    &mut socket_rx,
    &[
      r#"{"id":1,"result":{}}"#,
      r#"{"id":2,"result":{"debuggerId":"#,
    ],
    &[
      r#"{"method":"Runtime.executionContextCreated","params":{"context":{"id":1,"#,
    ],
  )
  .await;

    assert_inspector_messages(
      &mut socket_tx,
      &[r#"{"id":3,"method":"Runtime.runIfWaitingForDebugger"}"#],
      &mut socket_rx,
      &[r#"{"id":3,"result":{}}"#],
      &[r#"{"method":"Debugger.paused","#],
    )
    .await;

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":4,"method":"Runtime.evaluate","params":{"expression":"Deno.core.print(\"hello from the inspector\\n\")","contextId":1,"includeCommandLineAPI":true,"silent":false,"returnByValue":true}}"#,
    ],
    &mut socket_rx,
    &[r#"{"id":4,"result":{"result":{"type":"undefined"}}}"#],
    &[],
  )
  .await;

    assert_eq!(&stdout_lines.next().unwrap(), "hello from the inspector");

    assert_inspector_messages(
      &mut socket_tx,
      &[r#"{"id":5,"method":"Debugger.resume"}"#],
      &mut socket_rx,
      &[r#"{"id":5,"result":{}}"#],
      &[],
    )
    .await;

    assert_starts_with!(&stdout_lines.next().unwrap(), "running 1 test from");
    assert!(&stdout_lines
      .next()
      .unwrap()
      .contains("test has finished running"));

    child.kill().unwrap();
    child.wait().unwrap();
  }

  #[tokio::test]
  async fn inspector_with_ts_files() {
    let script = util::testdata_path().join("inspector/test.ts");
    let mut child = util::deno_cmd()
      .arg("run")
      .arg("--check")
      .arg(inspect_flag_with_unique_port("--inspect-brk"))
      .arg(script)
      .stdout(std::process::Stdio::piped())
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let ws_url = extract_ws_url_from_stderr(&mut stderr_lines);

    let (socket, response) =
      tokio_tungstenite::connect_async(ws_url).await.unwrap();
    assert_eq!(response.status(), 101); // Switching protocols.

    let (mut socket_tx, socket_rx) = socket.split();
    let mut socket_rx = socket_rx
      .map(|msg| msg.unwrap().to_string())
      .filter(|msg| {
        let pass = (msg.starts_with(r#"{"method":"Debugger.scriptParsed","#)
          && msg.contains("testdata/inspector"))
          || !msg.starts_with(r#"{"method":"Debugger.scriptParsed","#);
        futures::future::ready(pass)
      })
      .boxed_local();

    let stdout = child.stdout.as_mut().unwrap();
    let mut stdout_lines =
      std::io::BufReader::new(stdout).lines().map(|r| r.unwrap());

    assert_stderr_for_inspect_brk(&mut stderr_lines);

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":1,"method":"Runtime.enable"}"#,
      r#"{"id":2,"method":"Debugger.enable"}"#,
    ],
    &mut socket_rx,
    &[
      r#"{"id":1,"result":{}}"#,
    ],
    &[
      r#"{"method":"Runtime.executionContextCreated","params":{"context":{"id":1,"#,
    ],
  )
  .await;

    // receive messages with sources from this test
    let script1 = socket_rx.next().await.unwrap();
    assert!(script1.contains("testdata/inspector/test.ts"));
    let script1_id = {
      let v: serde_json::Value = serde_json::from_str(&script1).unwrap();
      v["params"]["scriptId"].as_str().unwrap().to_string()
    };
    let script2 = socket_rx.next().await.unwrap();
    assert!(script2.contains("testdata/inspector/foo.ts"));
    let script2_id = {
      let v: serde_json::Value = serde_json::from_str(&script2).unwrap();
      v["params"]["scriptId"].as_str().unwrap().to_string()
    };
    let script3 = socket_rx.next().await.unwrap();
    assert!(script3.contains("testdata/inspector/bar.js"));
    let script3_id = {
      let v: serde_json::Value = serde_json::from_str(&script3).unwrap();
      v["params"]["scriptId"].as_str().unwrap().to_string()
    };

    assert_inspector_messages(
      &mut socket_tx,
      &[],
      &mut socket_rx,
      &[r#"{"id":2,"result":{"debuggerId":"#],
      &[],
    )
    .await;

    assert_inspector_messages(
      &mut socket_tx,
      &[r#"{"id":3,"method":"Runtime.runIfWaitingForDebugger"}"#],
      &mut socket_rx,
      &[r#"{"id":3,"result":{}}"#],
      &[r#"{"method":"Debugger.paused","#],
    )
    .await;

    assert_inspector_messages(
    &mut socket_tx,
    &[
      &format!(r#"{{"id":4,"method":"Debugger.getScriptSource","params":{{"scriptId":"{}"}}}}"#, script1_id),
      &format!(r#"{{"id":5,"method":"Debugger.getScriptSource","params":{{"scriptId":"{}"}}}}"#, script2_id),
      &format!(r#"{{"id":6,"method":"Debugger.getScriptSource","params":{{"scriptId":"{}"}}}}"#, script3_id),
    ],
    &mut socket_rx,
    &[
      r#"{"id":4,"result":{"scriptSource":"import { foo } from \"./foo.ts\";\nimport { bar } from \"./bar.js\";\nconsole.log(foo());\nconsole.log(bar());\n//# sourceMappingURL=data:application/json;base64,"#,
      r#"{"id":5,"result":{"scriptSource":"class Foo {\n    hello() {\n        return \"hello\";\n    }\n}\nexport function foo() {\n    const f = new Foo();\n    return f.hello();\n}\n//# sourceMappingURL=data:application/json;base64,"#,
      r#"{"id":6,"result":{"scriptSource":"export function bar() {\n  return \"world\";\n}\n"#,
    ],
    &[],
  )
  .await;

    assert_inspector_messages(
      &mut socket_tx,
      &[r#"{"id":7,"method":"Debugger.resume"}"#],
      &mut socket_rx,
      &[r#"{"id":7,"result":{}}"#],
      &[],
    )
    .await;

    assert_eq!(&stdout_lines.next().unwrap(), "hello");
    assert_eq!(&stdout_lines.next().unwrap(), "world");

    child.kill().unwrap();
    child.wait().unwrap();
  }

  #[tokio::test]
  async fn inspector_memory() {
    let script = util::testdata_path().join("inspector/memory.js");
    let mut child = util::deno_cmd()
      .arg("run")
      .arg(inspect_flag_with_unique_port("--inspect-brk"))
      .arg(script)
      .stdout(std::process::Stdio::piped())
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let ws_url = extract_ws_url_from_stderr(&mut stderr_lines);

    let (socket, response) =
      tokio_tungstenite::connect_async(ws_url).await.unwrap();
    assert_eq!(response.status(), 101); // Switching protocols.

    let (mut socket_tx, socket_rx) = socket.split();
    let mut socket_rx = socket_rx
      .map(|msg| msg.unwrap().to_string())
      .filter(|msg| {
        let pass = !msg.starts_with(r#"{"method":"Debugger.scriptParsed","#);
        futures::future::ready(pass)
      })
      .boxed_local();

    assert_stderr_for_inspect_brk(&mut stderr_lines);

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":1,"method":"Runtime.enable"}"#,
      r#"{"id":2,"method":"Debugger.enable"}"#,

    ],
    &mut socket_rx,
    &[
      r#"{"id":1,"result":{}}"#,
      r#"{"id":2,"result":{"debuggerId":"#,
    ],
    &[
      r#"{"method":"Runtime.executionContextCreated","params":{"context":{"id":1,"#,
    ],
  )
  .await;

    assert_inspector_messages(
      &mut socket_tx,
      &[
        r#"{"id":3,"method":"Runtime.runIfWaitingForDebugger"}"#,
        r#"{"id":4,"method":"HeapProfiler.enable"}"#,
      ],
      &mut socket_rx,
      &[r#"{"id":3,"result":{}}"#, r#"{"id":4,"result":{}}"#],
      &[r#"{"method":"Debugger.paused","#],
    )
    .await;

    socket_tx
      .send(
        r#"{"id":5,"method":"Runtime.getHeapUsage", "params": {}}"#
          .to_string()
          .into(),
      )
      .await
      .unwrap();
    let msg = socket_rx.next().await.unwrap();
    let json_msg: serde_json::Value = serde_json::from_str(&msg).unwrap();
    assert_eq!(json_msg["id"].as_i64().unwrap(), 5);
    let result = &json_msg["result"];
    assert!(
      result["usedSize"].as_i64().unwrap()
        <= result["totalSize"].as_i64().unwrap()
    );

    socket_tx.send(
    r#"{"id":6,"method":"HeapProfiler.takeHeapSnapshot","params": {"reportProgress": true, "treatGlobalObjectsAsRoots": true, "captureNumberValue": false}}"#
      .to_string().into()
  ).await.unwrap();

    let mut progress_report_completed = false;
    loop {
      let msg = socket_rx.next().await.unwrap();

      if !progress_report_completed
        && msg.starts_with(
          r#"{"method":"HeapProfiler.reportHeapSnapshotProgress","params""#,
        )
      {
        let json_msg: serde_json::Value = serde_json::from_str(&msg).unwrap();
        if let Some(finished) = json_msg["params"].get("finished") {
          progress_report_completed = finished.as_bool().unwrap();
        }
        continue;
      }

      if msg.starts_with(r#"{"method":"HeapProfiler.reportHeapSnapshotProgress","params":{"done":"#,) {
      continue;
    }

      if msg.starts_with(r#"{"id":6,"result":{}}"#) {
        assert!(progress_report_completed);
        break;
      }
    }

    child.kill().unwrap();
    child.wait().unwrap();
  }

  #[tokio::test]
  async fn inspector_profile() {
    let script = util::testdata_path().join("inspector/memory.js");
    let mut child = util::deno_cmd()
      .arg("run")
      .arg(inspect_flag_with_unique_port("--inspect-brk"))
      .arg(script)
      .stdout(std::process::Stdio::piped())
      .stderr(std::process::Stdio::piped())
      .spawn()
      .unwrap();

    let stderr = child.stderr.as_mut().unwrap();
    let mut stderr_lines =
      std::io::BufReader::new(stderr).lines().map(|r| r.unwrap());
    let ws_url = extract_ws_url_from_stderr(&mut stderr_lines);

    let (socket, response) =
      tokio_tungstenite::connect_async(ws_url).await.unwrap();
    assert_eq!(response.status(), 101); // Switching protocols.

    let (mut socket_tx, socket_rx) = socket.split();
    let mut socket_rx = socket_rx
      .map(|msg| msg.unwrap().to_string())
      .filter(|msg| {
        let pass = !msg.starts_with(r#"{"method":"Debugger.scriptParsed","#);
        futures::future::ready(pass)
      })
      .boxed_local();

    assert_stderr_for_inspect_brk(&mut stderr_lines);

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":1,"method":"Runtime.enable"}"#,
      r#"{"id":2,"method":"Debugger.enable"}"#,

    ],
    &mut socket_rx,
    &[
      r#"{"id":1,"result":{}}"#,
      r#"{"id":2,"result":{"debuggerId":"#,
    ],
    &[
      r#"{"method":"Runtime.executionContextCreated","params":{"context":{"id":1,"#,
    ],
  )
  .await;

    assert_inspector_messages(
      &mut socket_tx,
      &[
        r#"{"id":3,"method":"Runtime.runIfWaitingForDebugger"}"#,
        r#"{"id":4,"method":"Profiler.enable"}"#,
      ],
      &mut socket_rx,
      &[r#"{"id":3,"result":{}}"#, r#"{"id":4,"result":{}}"#],
      &[r#"{"method":"Debugger.paused","#],
    )
    .await;

    assert_inspector_messages(
    &mut socket_tx,
    &[
      r#"{"id":5,"method":"Profiler.setSamplingInterval","params":{"interval": 100}}"#,
      r#"{"id":6,"method":"Profiler.start","params":{}}"#,
    ],
    &mut socket_rx,
    &[r#"{"id":5,"result":{}}"#, r#"{"id":6,"result":{}}"#],
    &[],
  )
  .await;

    tokio::time::sleep(tokio::time::Duration::from_millis(500)).await;

    socket_tx
      .send(
        r#"{"id":7,"method":"Profiler.stop", "params": {}}"#.to_string().into(),
      )
      .await
      .unwrap();
    let msg = socket_rx.next().await.unwrap();
    let json_msg: serde_json::Value = serde_json::from_str(&msg).unwrap();
    assert_eq!(json_msg["id"].as_i64().unwrap(), 7);
    let result = &json_msg["result"];
    let profile = &result["profile"];
    assert!(
      profile["startTime"].as_i64().unwrap()
        < profile["endTime"].as_i64().unwrap()
    );
    profile["samples"].as_array().unwrap();
    profile["nodes"].as_array().unwrap();

    child.kill().unwrap();
    child.wait().unwrap();
  }
}