CSHARP-5930: Stop throwing in test discovery when running locally (#1917)

ajcvickers · web-flow · commit f5480286f20f · 2026-03-23T09:39:06.000Z
Both EnsureNoUnobservedTaskException and EnsureNoUnobservedTaskException_Integration have the "UnobservedExceptionTracking" category. This means that the SingleOrDefault throws in test dicovery.

I don't know that this is the correct fix, but it's a starting point.
diff --git a/tests/MongoDB.TestHelpers/XunitExtensions/TimeoutEnforcing/TimeoutEnforcingXunitTestAssemblyRunner.cs b/tests/MongoDB.TestHelpers/XunitExtensions/TimeoutEnforcing/TimeoutEnforcingXunitTestAssemblyRunner.cs
@@ -41,7 +41,7 @@ public TimeoutEnforcingXunitTestAssemblyRunner(
                 executionMessageSink,
                 executionOptions)
         {
-            _unobservedExceptionTrackingTestCase = testCases.SingleOrDefault(IsUnobservedExceptionTrackingTestCase);
+            _unobservedExceptionTrackingTestCase = testCases.FirstOrDefault(IsUnobservedExceptionTrackingTestCase);
         }
 
         protected override Task<RunSummary> RunTestCollectionAsync(

Original file line number	Diff line number	Diff line change
`@@ -41,7 +41,7 @@ public TimeoutEnforcingXunitTestAssemblyRunner(`
`41`	`41`	`executionMessageSink,`
`42`	`42`	`executionOptions)`
`43`	`43`	`{`
`44`		`- _unobservedExceptionTrackingTestCase = testCases.SingleOrDefault(IsUnobservedExceptionTrackingTestCase);`
	`44`	`+ _unobservedExceptionTrackingTestCase = testCases.FirstOrDefault(IsUnobservedExceptionTrackingTestCase);`
`45`	`45`	`}`
`46`	`46`
`47`	`47`	`protected override Task<RunSummary> RunTestCollectionAsync(`