🤖 tests: eventLoopYielder "yield lets due timers run" flakes on a stalled runner #6822

src/node/utils/concurrency/eventLoopYielder.test.ts › "yield lets due timers run once the budget is used" failed in the merge queue and dropped #6804 (run 38777134519, job 116567701971, Test / Unit (3/6)):

expect(yielder.isDue()).toBe(false)   // line 19
Expected: false
Received: true

Cause (from the code): the test uses a 5 ms budget (new EventLoopYielder(5)). After await yielder.yield() resets lastYieldAt, a stall of 5 ms or more before the next line (CPU quota throttling on a shared runner) makes isDue() true again. The last assertion checks wall time, not the contract.

Fix: check the reset without a wall-clock race, for example by comparing isDue() right after yield() with a fake performance.now, or by dropping the last assertion (the timer assertion already pins the contract).

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