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…contracts Add deterministic tests (controlled with completers, no sleeps) for: - concurrent: invocations overlap and can complete out of order - sequential: invocations of the same handler are queued, while a handler for another event type keeps running - restartable: a new event cancels the previous invocation's emissions, while work it already started runs to completion
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Status
READY
Breaking Changes
NO
Description
Adds deterministic tests for the scheduling guarantees of
concurrent,sequentialandrestartable. The tests are driven byCompleters andStreamControllers, with no time-based waits.concurrent: invocations of the same handler overlap and can complete out of order.sequential: invocations of the same handler are queued in order, while a handler registered for another event type keeps running.restartable: a new event cancels the previous invocation. Its later emissions are ignored andemit.isDonebecomes true, but a future it already started still runs to completion.Each test was checked against a deliberately broken transformer (for example,
restartablereplaced byasyncExpand) and fails as expected. Tests only; no library changes.Type of Change