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test: fix a race in TestReinit#17902
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| cancel, err = p.Pubsub.Subscribe(event, listener) | ||
| p.Lock() |
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Would it not make more sense to move the subscribe call after we lock the spy's mutex?
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I don't think so; the mutex is protecting theexpectedEvent andtriedToSubscribe, not the underlying pubsub.
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closescoder/internal#632
pubsubReinitSpyused to signal that a subscription had happened before it actually had.This created a slight opportunity for the main goroutine to publish before the actual subscription was listening. The published event was then dropped, leading to a failed test.