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syncs: relax TestWatchMultipleValues timing on Windows

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The test is re-enabled for Windows with a relaxed time assertion.

On Windows the runtime poller currently does not have sufficient
resolution to meet the normal requirements for this test.

See https://github.com/golang/go/issues/44343 for background.

Updates #7876

Signed-off-by: James Tucker <jftucker@gmail.com>
This commit is contained in:
James Tucker 2023-04-14 17:01:29 -07:00
parent f85dc6f97c
commit cd35a79136
1 changed files with 7 additions and 4 deletions
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11
syncs/watchdog_test.go
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@ -46,9 +46,6 @@ func TestWatchContended(t *testing.T) {
}
func TestWatchMultipleValues(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("TODO(#7876): test regressed on windows while CI was broken")
}
mu := new(sync.Mutex)
ctx, cancel := context.WithCancel(context.Background())
defer cancel() // not necessary, but keep vet happy
@ -68,7 +65,13 @@ func TestWatchMultipleValues(t *testing.T) {
cancel()
}
}
if elapsed := time.Since(start); elapsed > 100*time.Millisecond {
// See https://github.com/golang/go/issues/44343 - on Windows the Go runtime timer resolution is currently too coarse. Allow longer in that case.
want := 100 * time.Millisecond
if runtime.GOOS == "windows" {
want = 500 * time.Millisecond
}
if elapsed := time.Since(start); elapsed > want {
t.Errorf("expected 1 event per millisecond, got only %v events in %v", n, elapsed)
}
}