fix: import from dist/ instead of src/ in tests with CJS deps

Tests for packages whose source uses require.resolve/__dirname
must import from compiled dist/ (CJS) instead of src/ (TS treated
as ESM by Node 24). This avoids "require is not defined" errors.

Assisted-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bennypowers

packages/dev-server-hmr/test/HmrPlugin.test.ts

@@ -4,8 +4,8 @@ import { stubMethod, restore as restoreStubs } from 'hanbi';
 import { createTestServer, fetchText, expectIncludes } from '@web/dev-server-core/test-helpers';
 import { posix as pathUtil } from 'path';
 
-import { hmrPlugin } from '../src/index.ts';
-import { NAME_HMR_CLIENT_IMPORT } from '../src/HmrPlugin.ts';
+import { hmrPlugin } from '../dist/index.js';
+import { NAME_HMR_CLIENT_IMPORT } from '../dist/HmrPlugin.js';
 import { mockFile, mockFiles } from './utils.ts';
 
 const __dirname = import.meta.dirname;

packages/dev-server-hmr/test/browser.test.ts

@@ -6,7 +6,7 @@ import type { Browser, HTTPResponse, Page } from 'puppeteer';
 import { launch as launchPuppeteer } from 'puppeteer';
 import { posix as pathUtil } from 'path';
 
-import { hmrPlugin } from '../src/index.ts';
+import { hmrPlugin } from '../dist/index.js';
 import { mockFiles } from './utils.ts';
 
 const __dirname = import.meta.dirname;

packages/dev-server-legacy/test/transform-html.test.ts

@@ -3,7 +3,7 @@ import assert from 'node:assert/strict';
 import { createTestServer } from '@web/dev-server-core/test-helpers';
 import { fetchText, expectIncludes } from '@web/dev-server-core/test-helpers';
 
-import { legacyPlugin } from '../src/legacyPlugin.ts';
+import { legacyPlugin } from '../dist/legacyPlugin.js';
 import { modernUserAgents, legacyUserAgents } from './userAgents.ts';
 
 const __dirname = import.meta.dirname;

packages/dev-server-legacy/test/transform-js.test.ts

@@ -3,7 +3,7 @@ import assert from 'node:assert/strict';
 import { createTestServer } from '@web/dev-server-core/test-helpers';
 import { fetchText, expectIncludes, expectNotIncludes } from '@web/dev-server-core/test-helpers';
 
-import { legacyPlugin } from '../src/legacyPlugin.ts';
+import { legacyPlugin } from '../dist/legacyPlugin.js';
 import { modernUserAgents, legacyUserAgents } from './userAgents.ts';
 
 const __dirname = import.meta.dirname;

packages/polyfills-loader/test/createPolyfillsData.test.ts

@@ -2,9 +2,9 @@ import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import path from 'path';
 
-import type { PolyfillsLoaderConfig, PolyfillFile } from '../src/types.ts';
-import { createPolyfillsData } from '../src/createPolyfillsData.ts';
-import { noModuleSupportTest, fileTypes } from '../src/utils.ts';
+import type { PolyfillsLoaderConfig, PolyfillFile } from '../dist/types.js';
+import { createPolyfillsData } from '../dist/createPolyfillsData.js';
+import { noModuleSupportTest, fileTypes } from '../dist/utils.js';
 
 const __dirname = import.meta.dirname;
 

packages/polyfills-loader/test/createPolyfillsLoader.test.ts

@@ -2,9 +2,9 @@ import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import fs from 'fs';
 import path from 'path';
-import type { PolyfillsLoaderConfig } from '../src/types.ts';
-import { createPolyfillsLoader } from '../src/createPolyfillsLoader.ts';
-import { noModuleSupportTest, fileTypes } from '../src/utils.ts';
+import type { PolyfillsLoaderConfig } from '../dist/types.js';
+import { createPolyfillsLoader } from '../dist/createPolyfillsLoader.js';
+import { noModuleSupportTest, fileTypes } from '../dist/utils.js';
 
 const __dirname = import.meta.dirname;
 const updateSnapshots = process.argv.includes('--update-snapshots');

packages/polyfills-loader/test/injectPolyfillsLoader.test.ts

@@ -2,9 +2,9 @@ import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import path from 'path';
 import fs from 'fs';
-import { injectPolyfillsLoader } from '../src/injectPolyfillsLoader.ts';
-import { noModuleSupportTest, fileTypes } from '../src/utils.ts';
-import type { PolyfillsLoaderConfig } from '../src/types.ts';
+import { injectPolyfillsLoader } from '../dist/injectPolyfillsLoader.js';
+import { noModuleSupportTest, fileTypes } from '../dist/utils.js';
+import type { PolyfillsLoaderConfig } from '../dist/types.js';
 
 const __dirname = import.meta.dirname;
 const updateSnapshots = process.argv.includes('--update-snapshots');

packages/rollup-plugin-html/test/rollup-plugin-html.test.ts

@@ -8,7 +8,7 @@ import {
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import path from 'path';
-import { rollupPluginHTML } from '../src/index.ts';
+import { rollupPluginHTML } from '../dist/index.js';
 
 const __dirname = import.meta.dirname;
 

packages/test-runner-chrome/test/chromeLauncher.test.ts

@@ -1,5 +1,5 @@
 import { runIntegrationTests } from '../../../integration/test-runner/index.ts';
-import { chromeLauncher } from '../src/index.ts';
+import { chromeLauncher } from '../dist/index.js';
 
 describe('test-runner-chrome', function testRunnerChrome() {
   this.timeout(20000);

packages/test-runner-playwright/test/playwrightLauncher.test.ts

@@ -1,6 +1,6 @@
 import os from 'os';
 import { runIntegrationTests } from '../../../integration/test-runner/index.ts';
-import { playwrightLauncher } from '../src/index.ts';
+import { playwrightLauncher } from '../dist/index.js';
 
 describe('test-runner-playwright chromium', function testRunnerPlaywright() {
   this.timeout(100000);