test(internal.clock): Fix flaky TestUnalignedTicker race condition#18515
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mstrandboge merged 1 commit intoinfluxdata:masterfrom Mar 12, 2026
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The select/default loop with clk.Add(1s) raced with the ticker goroutine's timer.Reset() call, causing the mock clock to advance between clk.Until() and timer.Reset(), shifting the timer deadline by 1 second. Replace the select/default loop with blocking channel reads. Since Timer(0) fires immediately inside the constructor, no clock advance is needed for the first tick. Blocking on each subsequent read ensures timer.Reset() completes before the next clk.Add().
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srebhan
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mstrandboge
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Mar 12, 2026
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Summary
The select/default loop with clk.Add(1s) raced with the ticker goroutine's timer.Reset() call, causing the mock clock to advance between clk.Until() and timer.Reset(), shifting the timer deadline by 1 second.
Replace the select/default loop with blocking channel reads. Since Timer(0) fires immediately inside the constructor, no clock advance is needed for the first tick. Blocking on each subsequent read ensures timer.Reset() completes before the next clk.Add().
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