Description
Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1056990
Build error leg or test failing: dotnet-watch.Tests.dll.3.WorkItemExecution
Pull request: #49092
Error Message
Fill the error message using step by step known issues guidance.
{
"ErrorMessage": "Failed Microsoft.DotNet.Watch.UnitTests.FileWatcherTests.DeleteSubfolder",
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}Sample failing log: https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-sdk-refs-pull-49092-merge-89284afdacb94b978c/dotnet-watch.Tests.dll.3/3/console.3de535af.log?helixlogtype=result
Failed Microsoft.DotNet.Watch.UnitTests.FileWatcherTests.DeleteSubfolder(usePolling: True) [1 s]
Error Message:
Expected:
ChangedPath { Path = /tmp/dotnetSdkTests.igDIQiVU/True/subdir, Kind = Delete },
ChangedPath { Path = /tmp/dotnetSdkTests.igDIQiVU/True/subdir/foo1, Kind = Delete },
ChangedPath { Path = /tmp/dotnetSdkTests.igDIQiVU/True/subdir/foo2, Kind = Delete },
ChangedPath { Path = /tmp/dotnetSdkTests.igDIQiVU/True/subdir/foo3, Kind = Delete }
Actual:
ChangedPath { Path = /tmp/dotnetSdkTests.igDIQiVU/True/subdir, Kind = Update },
ChangedPath { Path = /tmp/dotnetSdkTests.igDIQiVU/True/subdir, Kind = Delete },
ChangedPath { Path = /tmp/dotnetSdkTests.igDIQiVU/True/subdir/foo1, Kind = Delete },
ChangedPath { Path = /tmp/dotnetSdkTests.igDIQiVU/True/subdir/foo2, Kind = Delete }
Stack Trace:
at Microsoft.DotNet.Watch.UnitTests.AssertEx.Fail(String message) in /_/test/dotnet-watch.Tests/Utilities/AssertEx.cs:line 214
at Microsoft.DotNet.Watch.UnitTests.AssertEx.SequenceEqual[T](IEnumerable`1 expected, IEnumerable`1 actual, IEqualityComparer`1 comparer, String message, String itemSeparator, Func`2 itemInspector) in /_/test/dotnet-watch.Tests/Utilities/AssertEx.cs:line 169
at Microsoft.DotNet.Watch.UnitTests.FileWatcherTests.TestOperation(String dir, ChangedPath[] expectedChanges, Boolean usePolling, Action operation) in /_/test/dotnet-watch.Tests/FileWatcherTests.cs:line 63
at Microsoft.DotNet.Watch.UnitTests.FileWatcherTests.DeleteSubfolder(Boolean usePolling) in /_/test/dotnet-watch.Tests/FileWatcherTests.cs:line 353
--- End of stack trace from previous location ---
Standard Output Messages:
Have a look at the assertion the test is making --
sdk/test/dotnet-watch.Tests/FileWatcherTests.cs
Lines 353 to 390 in 0934942
It's asserting it will see a series of events exactly on different operating systems. FileSystemWatcher (and file notification APIs in the platform for that matter) don't garuntee that. You can't count on seeing all changed/updated events. Especially in the case of polling you cannot garuntee you'll see an update event if it's followed by a delete since a polling implementation can only see a file or directory has been removed, and not see any changes that might have happened between the last poll and removal.
This test should be changed to just assert on seeing a minimum set of events, not exact set. In other words - a contains check rather than equals.
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1056990
Error message validated: [Failed Microsoft.DotNet.Watch.UnitTests.FileWatcherTests.DeleteSubfolder]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 6/2/2025 8:08:17 PM UTC
Report
| Build | Definition | Test | Pull Request |
|---|---|---|---|
| 1091826 | dotnet/sdk | dotnet-watch.Tests.dll.3.WorkItemExecution | #49739 |
| 1089135 | dotnet/sdk | dotnet-watch.Tests.dll.3.WorkItemExecution | #49589 |
| 1088888 | dotnet/sdk | dotnet-watch.Tests.dll.3.WorkItemExecution | #49589 |
| 1088082 | dotnet/sdk | dotnet-watch.Tests.dll.3.WorkItemExecution | #49503 |
| 1081242 | dotnet/sdk | dotnet-watch.Tests.dll.3.WorkItemExecution | #49596 |
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 0 | 0 | 5 |