[Code] try fix ts-lang shutdown unit test (#37618)

.ci/jobs.yml

@@ -18,4 +18,4 @@ JOB:
   # - x-pack-visualRegression
 
 # `~` is yaml for `null`
-exclude: ~
+exclude: ~

x-pack/legacy/plugins/code/server/lsp/language_server_launcher.test.ts

@@ -11,7 +11,7 @@ import { ConsoleLoggerFactory } from '../utils/console_logger_factory';
 import { TYPESCRIPT } from './language_servers';
 import { TypescriptServerLauncher } from './ts_launcher';
 
-jest.setTimeout(10000);
+jest.setTimeout(15000);
 
 // @ts-ignore
 const options: ServerOptions = createTestServerOption();
@@ -29,13 +29,12 @@ function delay(seconds: number) {
   });
 }
 
-test.skip('typescript language server could be shutdown', async () => {
+test('typescript language server could be shutdown', async () => {
   const tsLauncher = new TypescriptServerLauncher('localhost', options, new ConsoleLoggerFactory());
   const proxy = await tsLauncher.launch(true, 1, TYPESCRIPT.embedPath!);
-  await proxy.initialize(options.workspacePath);
-  await delay(2);
   expect(tsLauncher.running).toBeTruthy();
+  await proxy.initialize(options.workspacePath);
   await proxy.exit();
-  await delay(2);
+  await delay(3);
   expect(tsLauncher.running).toBeFalsy();
 });

x-pack/legacy/plugins/code/server/lsp/proxy.ts

@@ -245,12 +245,7 @@ export class LanguageServerProxy implements ILanguageServerHandler {
   }
 
   private onSocketClosed() {
-    const conn = this.clientConnection;
     this.clientConnection = null;
-    if (conn) {
-      conn.dispose();
-    }
-
     this.eventEmitter.emit('close');
   }
 

x-pack/legacy/plugins/code/server/lsp/ts_launcher.ts

@@ -33,6 +33,8 @@ export class TypescriptServerLauncher extends AbstractLauncher {
     return TS_LANG_DETACH_PORT;
   }
 
+  protected startupTimeout = 5000;
+
   createExpander(
     proxy: LanguageServerProxy,
     builtinWorkspace: boolean,