Installs patch-package (^8.0.0) and a postinstall script, then applies
the diff from vitest PR #10267 against @vitest/browser-playwright@4.1.0.
What the patch changes (in dist/index.js):
- createPredicate(sessionId, url) → createPredicate(url): factory becomes
pure, returns { url, predicate } instead of mutating sessionIds /
idPreficates as a side-effect.
- sessionIds value type: array → Set (deduplicates resolved URLs).
- register handler now looks up any existing predicate for the
(sessionId, resolvedUrl) pair and unroutes it BEFORE installing the
new route. This is the actual race fix: without it, the second
vi.mock for a duplicate-id leaks an orphan Playwright route that
fires after birpc closes.
- clear handler iterates the Set via spread.
Why this matters even though Layer 1 normalised the only known duplicate
in our suite: every future vi.mock call is a class of race we shouldn't
have to think about. The patch closes the upstream gap at the
route-handler level, so a contributor reintroducing the duplicate-id
pattern can't reopen the race.
When to remove: when @vitest/browser-playwright ships a release
containing PR #10267. Delete patches/@vitest+browser-playwright+4.1.0.patch
and the postinstall hook (or keep the hook if other patches accumulate).
Refs: #553 · vitest-dev/vitest#9957 · vitest-dev/vitest#10267
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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