cherry-pick(#26503): chore: fix .only in dependent tests

packages/playwright-test/src/plugins/webServerPlugin.ts

@@ -117,7 +117,6 @@ export class WebServerPlugin implements TestRunnerPlugin {
         this._reporter!.onStdErr?.(colors.dim('[WebServer] ') + line.toString());
     });
     launchedProcess.stdout!.on('data', line => {
-      process.stdout.write(line);
       if (debugWebServer.enabled || this._options.stdout === 'pipe')
         this._reporter!.onStdOut?.(colors.dim('[WebServer] ') + line.toString());
     });

packages/playwright-test/src/runner/projectUtils.ts

@@ -70,8 +70,7 @@ export function buildProjectsClosure(projects: FullProjectInternal[], hasTests?:
       throw error;
     }
 
-    const projectHasTests = hasTests ? hasTests(project) : true;
-    if (!projectHasTests && depth === 0)
+    if (depth === 0 && hasTests && !hasTests(project))
       return;
 
     if (result.get(project) !== 'dependency')

tests/playwright-test/deps.spec.ts

@@ -643,3 +643,50 @@ test('should not run deps for projects filtered with grep', async ({ runInlineTe
   expect(result.passed).toBe(3);
   expect(result.outputLines).toEqual(['setupB', 'projectB', 'teardownB']);
 });
+
+test('should allow only in dependent', async ({ runInlineTest }) => {
+  const result = await runInlineTest({
+    'playwright.config.ts': `
+      module.exports = {
+        projects: [
+          { name: 'setup', testMatch: '**/setup.ts' },
+          { name: 'project', dependencies: ['setup'] },
+        ],
+      };`,
+    'setup.ts': `
+      import { test, expect } from '@playwright/test';
+      test('setup', async ({}) => {});
+    `,
+    'a.spec.ts': `
+      import { test, expect } from '@playwright/test';
+      test.only('test', async ({}) => {
+      });
+      test('test 2', async ({}) => { expect(1).toBe(2); });
+    `,
+  });
+  expect(result.exitCode).toBe(0);
+  expect(result.passed).toBe(2);
+});
+
+test('should allow only in dependent (2)', async ({ runInlineTest }) => {
+  const result = await runInlineTest({
+    'playwright.config.ts': `
+      module.exports = {
+        projects: [
+          { name: 'setup', testMatch: '**/setup.ts' },
+          { name: 'project', dependencies: ['setup'] },
+        ],
+      };`,
+    'setup.ts': `
+      import { test, expect } from '@playwright/test';
+      test.only('setup', async ({}) => {});
+    `,
+    'a.spec.ts': `
+      import { test, expect } from '@playwright/test';
+      test('test', async ({}) => { expect(1).toBe(2); });
+      test('test 2', async ({}) => { expect(1).toBe(2); });
+    `,
+  });
+  expect(result.exitCode).toBe(0);
+  expect(result.passed).toBe(1);
+});