fix(test runner): include jsxImportSource in transform cache hash

[Yury Semikhatsky (yury-s)]

Summary

• Include jsxImportSource (absolute path to playwright) in the transform cache key, so cached .tsx transforms aren't reused after playwright resolves to a different path.

Fixes #42934

[github-actions]

Test results for "tests 1"

5 flaky

⚠️ [chromium-library] › library/video.spec.ts:690 › screencast › should capture full viewport `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@chromium-ubuntu-22.04-node22`
⚠️ [chromium-library] › library/video.spec.ts:762 › screencast › should work with video+trace `@chromium-ubuntu-22.04-node22`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:257 › third party 'Partitioned;' cookies `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:470 › top level 'Partitioned;' cookie and same origin iframe `@firefox-ubuntu-22.04-node20`

52297 passed, 1243 skipped

---

Merge workflow run.

[github-actions]

Test results for "MCP"

1 failed
❌ [chrome] › mcp/webmcp-dynamic.spec.ts:189 › a tool registered in an iframe can be called after the page is reloaded @mcp-ubuntu-latest-chrome

8763 passed, 1480 skipped

---

Merge workflow run.

[github-actions]

Hi, I'm the Playwright bot and I took a first look at the CI failures here.

🟢 The one failure is a pre-existing flake

mcp/webmcp-dynamic.spec.ts:189 also fails on main. This PR only changes the transform cache hash, and this test doesn't use that code.

Details

This PR changes packages/playwright/src/transform/transform.ts (adds jsxImportSource to the transform cache hash) and adds a test in tests/playwright-test/cache.spec.ts. The "tests 1" run has no failures, only 5 flaky tests. The "MCP" run has one failure.

Pre-existing flake / infra

• [chrome] › mcp/webmcp-dynamic.spec.ts:189 › a tool registered in an iframe can be called after the page is reloaded (mcp-ubuntu-latest-chrome): the same test fails in places this PR can't affect.
  • It failed on main push 36037888265 (c69fc0b) on the same bot, mcp-ubuntu-latest-chrome. It also failed on main push 36076490274 (e17dffa) on mcp-macos-latest-chromium. Both times the error was Tool "webmcp_add" not found.
  • The same assertion failed on the unrelated PRs fix(mcp): rebind page-registered WebMCP tools when the tab or frame changes #42821 (firefox) and feat(chromium): roll to r1247 #42915 (chromium roll).
  • Across the test-results DB, the chrome project passed this test in 44 runs and failed in 1 before this PR. The test was added recently, so its history is short, but it switches between pass and fail on SHAs unrelated to this PR.
  • Those earlier failures look like the iframe tool is not registered again after the reload. I could not pull this run's error text from the job log, so I haven't confirmed it fails the same way. The test runs through the MCP server and the WebMCP tool bridge, not through the test runner's Babel transform or its cache.

_{Triaged by the Playwright bot - agent run}

[Pavel Feldman (pavelfeldman)]

It is essential that you use ?? instead, to pretend that you are using a coding agent.