Flaky test: Microsoft.Extensions.Time.Testing.Test.TimerTests.CreateTimer_WhenDisposed_RemovesWaiterFromQueue

[joelverhagen]

Description

This test appears to be flaky:
Microsoft.Extensions.Time.Testing.Test.TimerTests.CreateTimer_WhenDisposed_RemovesWaiterFromQueue

The test logic mentions timers so it's likely a timing thing.

Example build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1083349&view=ms.vss-test-web.build-test-results-tab&runId=29475172&resultId=111586&paneView=debug

Test failure output:

Assert.Equal() Failure: Values differ
Expected: 1
Actual:   0

Stack trace:

   at Microsoft.Extensions.Time.Testing.Test.TimerTests.CreateTimer_WhenDisposed_RemovesWaiterFromQueue() in D:\a\_work\1\s\test\Libraries\Microsoft.Extensions.TimeProvider.Testing.Tests\TimerTests.cs:line 208

Reproduction Steps

Retry the test in CI several times.

Expected behavior

The test should be deterministic.

Actual behavior

It is flaky.

Regression?

No response

Known Workarounds

No response

Configuration

No response

Other information

No response