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Tobias Koppers 56b95f41a2 test: stabilize error recovery snapshot timing (#98414 )

### What?

Stabilizes the pages-router `syntax > runtime error` acceptance test
without weakening its redbox assertions.

### Why?

The fixture emitted runtime errors every second and waited exactly one
second before capturing the first redbox. On slower release runners, a
second error could arrive while the asynchronous snapshot was being
collected, changing the expected single error into an array and causing
repeated retries.

The broader canary assertion cluster has several independent signatures;
this PR intentionally addresses only the timing race with a
reproducible, test-local cause.

### How?

The redbox matcher now performs the initial wait itself, while the
fixture uses a longer interval to leave a stable capture window. The
later wait remains long enough for another runtime error to occur,
preserving the test’s core assertion that a subsequent runtime error
does not replace the syntax/build error.

### Verification

- `pnpm build-all`
- `HEADLESS=true NEXT_TELEMETRY_DISABLED=1 NEXT_TEST_CI=true pnpm
test-dev-webpack test/development/acceptance/error-recovery.test.ts` (6
tests and 10 snapshots passed)
- Prettier and ESLint on the changed file

<!-- NEXT_JS_LLM -->

<!-- fleet ee9dd3ec-a271-4d0d-8165-d7872e226a6a -->

Co-authored-by: vercel-fleet-prod[bot] <318278635+vercel-fleet-prod[bot]@users.noreply.github.com>
Co-authored-by: Tobias Koppers <1365881+sokra@users.noreply.github.com>

2026-09-09 15:03:46 +02:00

fixtures

…

error-recovery.test.ts

test: stabilize error recovery snapshot timing (#98414 )

2026-09-09 15:03:46 +02:00

hydration-error.test.ts

Convert tests using createNext -> nextTestSetup (#93767 )

2026-05-12 13:16:31 +02:00

ReactRefresh.test.ts

…

ReactRefreshLogBox-app-doc.test.ts