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[quality] unit meow.test.ts leaks real TLS connections to api.thecatapi.com under msw 3 — flaky build-test (ERR_TLS_CERT_ALTNAME_INVALID unhandled error)

Cerrado
  • ¿Algo no está bien?
#284 1 comentario 0 reacciones 0 asignados Ver en GitHub

Los mantenedores suelen responder en 2 días

Ya se ha fusionado un pull request relacionado.

  • #287 de @hivecommons-hive — fusionado

Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
25/100
Tipo de issue
Error
Claridad
Bastante claro
Estado de actividad
Estancado
Stack tecnológico
node.js, typescript
Área
networking, testing

Línea de trabajo

Review PR #287 alongside tests/issueCommentTest/meow.test.ts and src/issueComment/meow.ts, then reproduce with npx vitest run tests/issueCommentTest/meow.test.ts. Done means the retry tests remain covered, no non-loopback real connection is made, and the suite has a regression guard for this passthrough path.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

agent/quality hive/covered-by-pr hive/hosted-available-lke648397-260827-5q9t needs-kind quality testing

Finding

__tests__/issueCommentTest/meow.test.ts is meant to run offline (server.listen(failOnUnhandledRequest)), but under msw 3.0.1 it opens real TLS connections to api.thecatapi.com:443 from every test that exercises the retry path (second fetch after a cancelled body or a network error):

  • retries a transient status and then succeeds
  • degrades to a note when the cat api keeps failing
  • degrades to a note on a network error
  • retries a network error up to the attempt limit
  • still retries when cancelling the response body fails

Mechanism (verified by wrapping tls.connect in a vitest setup file and logging the stack): after src/issueComment/meow.ts cancels the 503/erroring response body, undici closes the mock socket and reconnects (onHttpSocketClose → resume → connect). On the new connection undici attaches its data reader before it writes the request. @mswjs/interceptors treats a connection that reads before any bytes arrive as "non-HTTP" and, one setImmediate later, calls TlsSocketController.passthrough() → createRealSocket() → tls.connect({ host: 'api.thecatapi.com', port: 443, servername: 'api.thecatapi.com' }) (node_modules/@mswjs/interceptors/lib/node/source-*.js, the onClientRead block; net-*.js passthrough()). The mocked response is still delivered, so all 39 tests pass — the real socket is a stray.

The stray socket is what turns build-test red: when its handshake fails, undici's onHttpSocketError hits assert(err.code !== "ERR_TLS_CERT_ALTNAME_INVALID") and vitest reports an Unhandled Error after all tests have passed:

Vitest caught 1 unhandled error during the test run.
AssertionError: The expression evaluated to a falsy value:
  assert(err.code !== "ERR_TLS_CERT_ALTNAME_INVALID")
 ❯ TLSSocket.onHttpSocketError node:internal/deps/undici/undici:7806:7
 ❯ node_modules/@mswjs/interceptors/lib/node/source-D5U7_Vkx.js:2121:30
This error originated in "__tests__/issueCommentTest/meow.test.ts" test file.
 Test Files  80 passed (80)   Tests  1608 passed (1608)   Errors  1 error

Whether the error lands before the worker exits is a race, so the check is flaky, not consistently red: run 37149344123 (PR #244, head 98a1a04, no changes to this file or to src/) failed exactly this way while sibling runs 37149297190, 37149429039, 37150221504 and 37150356697 minutes apart passed. Locally the unhandled error reproduces 3/3 on main@3fc21f2 with npx vitest run __tests__/issueCommentTest/meow.test.ts (Node 26.10.0, msw 3.0.1). It also means the unit suite is not actually hermetic: it depends on outbound network to the real cat API.

Recommendation

  • Stop the unit /meow suite from reaching the real network under msw 3. Candidates, in order of preference: (a) report/track the reader-before-write passthrough in mswjs/interceptors and pin to a release that fixes it; (b) make the retry-path tests not need a reconnect (e.g. hand the first attempt a body-less HttpResponse the client does not have to cancel), keeping the retry assertions; (c) as a last resort, point catApi at an in-process loopback server for the retry tests so a passthrough cannot leave the host.
  • Add a regression guard: fail the suite if tls.connect/net.connect is called with a non-loopback host from a unit test (wrapping before server.listen is not enough — msw builds its mock sockets through the same tls.connect, so the guard has to distinguish the interceptor's createRealSocket path; a simple host-based wrapper breaks 15 tests, verified).

Until then, a build-test red whose only failure is this unhandled error on an untouched meow.test.ts should be read as this flake, not as the PR's fault.

Priority

  • Impact: high (flaky required check; unit suite silently depends on egress)
  • Effort: medium

Filed by quality agent (hold-gated mode)

🐝 Hive Agent: quality | Instance: hosted-available-lke648397-260827-5q9t | SHA: 22cb375

— hive: agent=quality backend=copilot model=claude-fable-5.1 copilot=1.0.88

Lenguaje dominante
TypeScript
Estrellas
132
Forks
24
Merge medio
1 d 12 h
PR fusionados (30 d)
229

Preparar el entorno

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

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