fix(testServer): pass use options to listFiles command (#34832)

packages/playwright/src/isomorphic/teleReceiver.ts

@@ -52,6 +52,7 @@ export type JsonProject = {
   testIgnore: JsonPattern[];
   testMatch: JsonPattern[];
   timeout: number;
+  use: { [key: string]: any };
 };
 
 export type JsonSuite = {
@@ -326,7 +327,7 @@ export class TeleReporterReceiver {
       dependencies: project.dependencies,
       teardown: project.teardown,
       snapshotDir: this._absolutePath(project.snapshotDir),
-      use: {},
+      use: project.use,
     };
   }
 

packages/playwright/src/reporters/teleEmitter.ts

@@ -184,10 +184,17 @@ export class TeleReporterEmitter implements ReporterV2 {
       dependencies: project.dependencies,
       snapshotDir: this._relativePath(project.snapshotDir),
       teardown: project.teardown,
+      use: this._serializeProjectUseOptions(project.use),
     };
     return report;
   }
 
+  private _serializeProjectUseOptions(use: reporterTypes.FullProject['use']): Record<string, any> {
+    return {
+      testIdAttribute: use.testIdAttribute,
+    };
+  }
+
   private _serializeSuite(suite: reporterTypes.Suite): teleReceiver.JsonSuite {
     const result = {
       title: suite.title,

tests/playwright-test/test-server.spec.ts

@@ -120,6 +120,31 @@ test('file watching', async ({ startTestServer, writeFiles }, testInfo) => {
   ]);
 });
 
+test('should list tests with testIdAttribute', async ({ startTestServer, writeFiles }) => {
+  await writeFiles({
+    'a.test.ts': `
+      import { test } from '@playwright/test';
+      test('foo', () => {});
+      `,
+    'playwright.config.ts': `
+        module.exports = {
+        projects: [{
+          name: 'chromium',
+          use: {
+            testIdAttribute: 'testId',
+          }
+        }]
+      };
+      `,
+  });
+
+  const testServerConnection = await startTestServer();
+  const events = await testServerConnection.listFiles({});
+  const onProject = events.report.find(e => e.method === 'onProject').params.project;
+  expect(onProject.name).toBe('chromium');
+  expect(onProject.use.testIdAttribute).toBe('testId');
+});
+
 test('stdio interception', async ({ startTestServer, writeFiles }) => {
   const testServerConnection = await startTestServer();
   await testServerConnection.initialize({ interceptStdio: true });