fix(test runner): avoid dependency tracking colliding between esm and cjs (#29994)

When collecting dependencies both from CJS loader and from ESM loader,
the latter would overwrite the dependencies set instead of appending.

Also make sure cts/cjs/mts/mjs are all supported equally.

References #29747.

packages/playwright/src/common/ipc.ts

@@ -15,7 +15,7 @@
  */
 
 import util from 'util';
-import { serializeCompilationCache } from '../transform/compilationCache';
+import { type SerializedCompilationCache, serializeCompilationCache } from '../transform/compilationCache';
 import type { ConfigLocation, FullConfigInternal } from './config';
 import type { ReporterDescription, TestInfoError, TestStatus } from '../../types/test';
 
@@ -43,7 +43,7 @@ export type ConfigCLIOverrides = {
 export type SerializedConfig = {
   location: ConfigLocation;
   configCLIOverrides: ConfigCLIOverrides;
-  compilationCache: any;
+  compilationCache?: SerializedCompilationCache;
 };
 
 export type TtyParams = {

packages/playwright/src/transform/compilationCache.ts

@@ -27,7 +27,7 @@ export type MemoryCache = {
   moduleUrl?: string;
 };
 
-type SerializedCompilationCache = {
+export type SerializedCompilationCache = {
   sourceMaps: [string, string][],
   memoryCache: [string, MemoryCache][],
   fileDependencies: [string, string[]][],
@@ -158,15 +158,19 @@ export function serializeCompilationCache(): SerializedCompilationCache {
   };
 }
 
-export function addToCompilationCache(payload: any) {
+export function addToCompilationCache(payload: SerializedCompilationCache) {
   for (const entry of payload.sourceMaps)
     sourceMaps.set(entry[0], entry[1]);
   for (const entry of payload.memoryCache)
     memoryCache.set(entry[0], entry[1]);
-  for (const entry of payload.fileDependencies)
-    fileDependencies.set(entry[0], new Set(entry[1]));
-  for (const entry of payload.externalDependencies)
-    externalDependencies.set(entry[0], new Set(entry[1]));
+  for (const entry of payload.fileDependencies) {
+    const existing = fileDependencies.get(entry[0]) || [];
+    fileDependencies.set(entry[0], new Set([...entry[1], ...existing]));
+  }
+  for (const entry of payload.externalDependencies) {
+    const existing = externalDependencies.get(entry[0]) || [];
+    externalDependencies.set(entry[0], new Set([...entry[1], ...existing]));
+  }
 }
 
 function calculateCachePath(filePath: string, hash: string): string {
@@ -249,9 +253,9 @@ const kPlaywrightCoveragePrefix = path.resolve(__dirname, '../../../../tests/con
 export function belongsToNodeModules(file: string) {
   if (file.includes(`${path.sep}node_modules${path.sep}`))
     return true;
-  if (file.startsWith(kPlaywrightInternalPrefix) && file.endsWith('.js'))
+  if (file.startsWith(kPlaywrightInternalPrefix) && (file.endsWith('.js') || file.endsWith('.mjs')))
     return true;
-  if (file.startsWith(kPlaywrightCoveragePrefix) && file.endsWith('.js'))
+  if (file.startsWith(kPlaywrightCoveragePrefix) && (file.endsWith('.js') || file.endsWith('.mjs')))
     return true;
   return false;
 }

packages/playwright/src/transform/transform.ts

@@ -240,7 +240,7 @@ function installTransform(): () => void {
     if (!shouldTransform(filename))
       return code;
     return transformHook(code, filename).code;
-  }, { exts: ['.ts', '.tsx', '.js', '.jsx', '.mjs'] });
+  }, { exts: ['.ts', '.tsx', '.js', '.jsx', '.mjs', '.mts', '.cjs', '.cts'] });
 
   return () => {
     reverted = true;

packages/playwright/src/worker/testInfo.ts

@@ -171,7 +171,7 @@ export class TestInfoImpl implements TestInfo {
     this._timeoutManager = new TimeoutManager(this.project.timeout);
 
     this.outputDir = (() => {
-      const relativeTestFilePath = path.relative(this.project.testDir, this._requireFile.replace(/\.(spec|test)\.(js|ts|mjs)$/, ''));
+      const relativeTestFilePath = path.relative(this.project.testDir, this._requireFile.replace(/\.(spec|test)\.(js|ts|jsx|tsx|mjs|mts|cjs|cts)$/, ''));
       const sanitizedRelativePath = relativeTestFilePath.replace(process.platform === 'win32' ? new RegExp('\\\\', 'g') : new RegExp('/', 'g'), '-');
       const fullTitleWithoutSpec = this.titlePath.slice(1).join(' ');
 

tests/playwright-test/watch.spec.ts

@@ -91,8 +91,85 @@ test('should print dependencies in ESM mode', async ({ runInlineTest }) => {
   const output = result.output;
   const deps = JSON.parse(output.match(/###(.*)###/)![1]);
   expect(deps).toEqual({
-    'a.test.ts': ['helperA.ts', 'index.mjs'],
-    'b.test.ts': ['helperA.ts', 'helperB.ts', 'index.mjs'],
+    'a.test.ts': ['helperA.ts'],
+    'b.test.ts': ['helperA.ts', 'helperB.ts'],
+  });
+});
+
+test('should print dependencies in mixed CJS/ESM mode 1', async ({ runInlineTest }) => {
+  const result = await runInlineTest({
+    'package.json': `{ "type": "module" }`,
+    'playwright.config.ts': `
+      import { defineConfig } from '@playwright/test';
+      export default defineConfig({
+        globalTeardown: './globalTeardown.ts',
+      });
+    `,
+    'helperA.cjs': `exports.foo = () => {}`,
+    'helperB.cjs': `require('./helperA');`,
+    'a.test.ts': `
+      import './helperA';
+      import { test, expect } from '@playwright/test';
+      test('passes', () => {});
+    `,
+    'b.test.cjs': `
+      require('./helperB');
+      const { test, expect } = require('@playwright/test');
+      test('passes', () => {});
+    `,
+    'globalTeardown.ts': `
+      import { fileDependencies } from 'playwright/lib/internalsForTest';
+      export default () => {
+        console.log('###' + JSON.stringify(fileDependencies()) + '###');
+      };
+    `
+  }, {});
+
+  expect(result.exitCode).toBe(0);
+  expect(result.passed).toBe(2);
+  const output = result.output;
+  const deps = JSON.parse(output.match(/###(.*)###/)![1]);
+  expect(deps).toEqual({
+    'a.test.ts': ['helperA.cjs'],
+    'b.test.cjs': ['helperA.cjs', 'helperB.cjs'],
+  });
+});
+
+test('should print dependencies in mixed CJS/ESM mode 2', async ({ runInlineTest }) => {
+  const result = await runInlineTest({
+    'playwright.config.mts': `
+      import { defineConfig } from '@playwright/test';
+      export default defineConfig({
+        globalTeardown: './globalTeardown.ts',
+      });
+    `,
+    'helperA.cjs': `exports.foo = () => {}`,
+    'helperB.cts': `import './helperA';`,
+    'a.test.mts': `
+      import './helperA';
+      import { test, expect } from '@playwright/test';
+      test('passes', () => {});
+    `,
+    'b.test.ts': `
+      import './helperB';
+      const { test, expect } = require('@playwright/test');
+      test('passes', () => {});
+    `,
+    'globalTeardown.ts': `
+      import { fileDependencies } from 'playwright/lib/internalsForTest';
+      export default () => {
+        console.log('###' + JSON.stringify(fileDependencies()) + '###');
+      };
+    `
+  }, {});
+
+  expect(result.exitCode).toBe(0);
+  expect(result.passed).toBe(2);
+  const output = result.output;
+  const deps = JSON.parse(output.match(/###(.*)###/)![1]);
+  expect(deps).toEqual({
+    'a.test.mts': ['helperA.cjs'],
+    'b.test.ts': ['helperA.cjs', 'helperB.cts'],
   });
 });