vercel__workflow/.changeset/test-promise-race-prefix-determinism.md at codex/atomic-start-postgres

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Nathan Rajlich 234412a9d7 [core] Add Promise.race([sleep, hook]) prefix determinism tests (#2125 )

Translates the diagrammed pattern into 5 prefix-replay tests that run the
same workflow against progressively longer prefixes of a 5-event log
(hook_created, wait_created, hook_received A, wait_completed,
hook_received B). Each test asserts the consumer takes the same
deterministic path: suspending at the right intermediate point with the
right invocationsQueue state, or completing with race winners
[hookA, sleep]. The full-log test verifies that the trailing
hook_received B is consumed by the dangling race-2 hook awaiter without
producing an unconsumed-event error. Runs in both sync and async
deserialization modes via the existing defineTests harness.

2026-05-27 22:18:08 +00:00

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