feat(lsp): add asset cache regression test

When we migrated away from all the locks, there was a regression that
was not caught immediately. The tsc::get_asset() would attempt to modify
the snapshot, but the problem was that the snapshot was a .clone() of
the inner language server's assets, which meant that modifications to
that where lost. When we then attempted to do a hover on those assets,
the inner language servers assets didn't have the retrieved asset, and
therefore would throw an error.

cli/lsp/language_server.rs

@@ -1934,6 +1934,51 @@ mod tests {
     harness.run().await;
   }
 
+  #[tokio::test]
+  async fn test_hover_asset() {
+    let mut harness = LspTestHarness::new(vec![
+      ("initialize_request.json", LspResponse::RequestAny),
+      ("initialized_notification.json", LspResponse::None),
+      ("did_open_notification_asset.json", LspResponse::None),
+      ("hover_request_asset_01.json", LspResponse::RequestAny),
+      (
+        "virtual_text_document_request.json",
+        LspResponse::RequestAny,
+      ),
+      (
+        "hover_request_asset_02.json",
+        LspResponse::Request(
+          4,
+          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_request.json",
+        LspResponse::Request(3, json!(null)),
+      ),
+      ("exit_notification.json", LspResponse::None),
+    ]);
+    harness.run().await;
+  }
+
   #[tokio::test]
   async fn test_hover_disabled() {
     let mut harness = LspTestHarness::new(vec![

cli/tests/lsp/did_open_notification_asset.json

@@ -0,0 +1,12 @@
+{
+  "jsonrpc": "2.0",
+  "method": "textDocument/didOpen",
+  "params": {
+    "textDocument": {
+      "uri": "file:///a/file.ts",
+      "languageId": "typescript",
+      "version": 1,
+      "text": "console.log(Date.now());\n"
+    }
+  }
+}

cli/tests/lsp/hover_request_asset_01.json

@@ -0,0 +1,14 @@
+{
+  "jsonrpc": "2.0",
+  "id": 4,
+  "method": "textDocument/hover",
+  "params": {
+    "textDocument": {
+      "uri": "file:///a/file.ts"
+    },
+    "position": {
+      "line": 0,
+      "character": 12
+    }
+  }
+}

cli/tests/lsp/hover_request_asset_02.json

@@ -0,0 +1,14 @@
+{
+  "jsonrpc": "2.0",
+  "id": 4,
+  "method": "textDocument/hover",
+  "params": {
+    "textDocument": {
+      "uri": "deno:/asset//lib.es2015.symbol.wellknown.d.ts"
+    },
+    "position": {
+      "line": 109,
+      "character": 13
+    }
+  }
+}

cli/tests/lsp/virtual_text_document_request.json

@@ -0,0 +1,10 @@
+{
+  "jsonrpc": "2.0",
+  "id": 2,
+  "method": "deno/virtualTextDocument",
+  "params": {
+    "textDocument": {
+      "uri": "deno:/asset//lib.es2015.symbol.wellknown.d.ts"
+    }
+  }
+}