validate-wpt

name	validate-wpt
description	Temporarily update this repository's web-platform-tests downloader to use the head commit from a web-platform-tests/wpt pull request, run the test suite, report the results, and restore the downloader afterward. Use when the user asks to validate, try, or test a WPT PR against this repo.
metadata	{"display-name":"Validate WPT","short-description":"Validate WPT PRs"}

Validate WPT

Overview

Validate a web-platform-tests/wpt pull request against this repo by pinning scripts/get-latest-platform-tests.js to the PR head commit, running npm test, and restoring the script before finishing.

Workflow

1. Parse the PR number from the user-provided WPT PR URL. Strip any URL fragment such as #event-... or #issuecomment-...; accept trailing slashes.

2. Confirm scripts/get-latest-platform-tests.js has no existing local edits before changing it. If it is already modified, do not overwrite or restore it without explicit user approval.

3. Get the PR head information with gh:

   gh pr view PR_NUMBER --repo web-platform-tests/wpt --json headRefOid,headRepositoryOwner,headRepository
   

   Use:

   • headRefOid as the commitHash
   • headRepositoryOwner.login as the GitHub owner
   • headRepository.name as the GitHub repo

4. Edit scripts/get-latest-platform-tests.js:

   • Replace the commitHash string with the PR head SHA.
   • Replace the owner and repo in urlPrefix so it points to the PR head repository.

   For a fork PR from Dubzer/wpt, use:

   const urlPrefix = `https://raw.githubusercontent.com/Dubzer/wpt/${commitHash}/url/`;
   

   For a PR directly from web-platform-tests/wpt, keep:

   const urlPrefix = `https://raw.githubusercontent.com/web-platform-tests/wpt/${commitHash}/url/`;
   

5. Run npm test.

6. Report the result:

   • State whether the run passed or failed.
   • Include the pass and fail counts when the test runner prints them.
   • Summarize any failing tests.
   • Wrap test names, URLs, expected values, actual values, backslashes, and angle-bracketed strings in backticks so Markdown does not interpret them.

7. Restore scripts/get-latest-platform-tests.js to its original state before finishing. If the file was clean before step 4, use:

   git checkout -- scripts/get-latest-platform-tests.js
   

   Confirm the restore succeeded with git diff -- scripts/get-latest-platform-tests.js.