chore(cli): implement test harness by pavelfeldman · Pull Request #38914 · microsoft/playwright

pavelfeldman · 2026-01-22T21:13:07Z

No description provided.

dgozman · 2026-01-22T22:28:18Z

+    const userDataDir = testInfo.outputPath('user-data-dir');
+
+    const daemonPath = path.resolve(__dirname, '../../packages/playwright/cli.js');
+    const daemon = spawn(process.execPath, [daemonPath, 'run-mcp-server', `--daemon=${socketPath}`, `--user-data-dir=${userDataDir}`], {


I'd recommend using a childProcess fixture from the commonFixtures.ts - it has some useful goodies already.

I'll leave it as an exercise for the reader!

dgozman · 2026-01-22T22:30:05Z

+
+  cli: async ({ socketPath }, use, testInfo) => {
+    await use(async (args: string[]) => {
+      const cli = spawn(process.execPath, [require.resolve('../../packages/playwright/lib/mcp/terminal/cli.js'), ...args], {


Perhaps spawnSync will be fine here?

did not work!

github-actions · 2026-01-23T05:31:16Z

Test results for "MCP"

10 failed
❌ [webkit] › mcp/snapshot-mode.spec.ts:58 › should respect --snapshot-mode=incremental @mcp-windows-latest
❌ [chrome] › mcp/cli.spec.ts:267 › save as › screenshot --full-page @mcp-macos-15
❌ [chromium] › mcp/cli.spec.ts:162 › core › dialog-accept @mcp-macos-15
❌ [chromium] › mcp/cli.spec.ts:267 › save as › screenshot --full-page @mcp-macos-15
❌ [chromium] › mcp/cli.spec.ts:342 › devtools › tracing-start-stop @mcp-macos-15
❌ [chromium] › mcp/launch.spec.ts:21 › test reopen browser @mcp-macos-15
❌ [firefox] › mcp/cli.spec.ts:267 › save as › screenshot --full-page @mcp-macos-15
❌ [firefox] › mcp/cli.spec.ts:342 › devtools › tracing-start-stop @mcp-macos-15
❌ [webkit] › mcp/cli.spec.ts:267 › save as › screenshot --full-page @mcp-macos-15
❌ [webkit] › mcp/snapshot-mode.spec.ts:58 › should respect --snapshot-mode=incremental @mcp-macos-15

3096 passed, 300 skipped

Merge workflow run.