[tests] Ignore NSUrlSessionHandlerTest.DisposeAndRecreateBackgroundSessionHandler if the background session is in use. #24545

rolfbjarne · 2026-01-22T15:57:29Z

Hopefully fixes this test failure:

[FAIL] DisposeAndRecreateBackgroundSessionHandler :   Second request exception
  Expected: null
  But was:  <System.Net.Http.HttpRequestException: Could not communicate with background transfer service
  ---> Foundation.NSErrorException: Error Domain=NSURLErrorDomain Code=-996 "Could not communicate with background transfer service" UserInfo={_NSURLErrorRelatedURLSessionTaskErrorKey=(
       "BackgroundDataTask <FE008EA4-3168-4E2F-B066-9565EEC47E67>.<1>"
      ), NSLocalizedDescription=Could not communicate with background transfer service, _NSURLErrorFailingURLSessionTaskErrorKey=BackgroundDataTask <FE008EA4-3168-4E2F-B066-9565EEC47E67>.<1>}
  --- End of inner exception stack trace ---
  at System.Net.Http.NSUrlSessionHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) in /Users/builder/azdo/_work/4/s/macios/src/Foundation/NSUrlSessionHandler.cs:line 595
  at System.Net.Http.HttpClient.GetByteArrayAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken)
  at MonoTests.System.Net.Http.NSUrlSessionHandlerTest.<>c.<<DisposeAndRecreateBackgroundSessionHandler>b__0_1>d.MoveNext() in /Users/builder/azdo/_work/1/s/macios/tests/monotouch-test/System.Net.Http/NSUrlSessionHandlerTest.cs:line 47
  --- End of stack trace from previous location ---
  at TestRuntime.TryRunAsync(TimeSpan timeout, Task startTask, Task completionTask, UIImage imageToShow, Exception& exception) in /Users/builder/azdo/_work/1/s/macios/tests/common/TestRuntime.RunAsync.cs:line 119>
  at MonoTests.System.Net.Http.NSUrlSessionHandlerTest.DisposeAndRecreateBackgroundSessionHandler() in /Users/builder/azdo/_work/1/s/macios/tests/monotouch-test/System.Net.Http/NSUrlSessionHandlerTest.cs:line 60

…ssionHandler if the background session is in use. Hopefully fixes this test failure: [FAIL] DisposeAndRecreateBackgroundSessionHandler : Second request exception Expected: null But was: <System.Net.Http.HttpRequestException: Could not communicate with background transfer service ---> Foundation.NSErrorException: Error Domain=NSURLErrorDomain Code=-996 "Could not communicate with background transfer service" UserInfo={_NSURLErrorRelatedURLSessionTaskErrorKey=( "BackgroundDataTask <FE008EA4-3168-4E2F-B066-9565EEC47E67>.<1>" ), NSLocalizedDescription=Could not communicate with background transfer service, _NSURLErrorFailingURLSessionTaskErrorKey=BackgroundDataTask <FE008EA4-3168-4E2F-B066-9565EEC47E67>.<1>} --- End of inner exception stack trace --- at System.Net.Http.NSUrlSessionHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) in /Users/builder/azdo/_work/4/s/macios/src/Foundation/NSUrlSessionHandler.cs:line 595 at System.Net.Http.HttpClient.GetByteArrayAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken) at MonoTests.System.Net.Http.NSUrlSessionHandlerTest.<>c.<<DisposeAndRecreateBackgroundSessionHandler>b__0_1>d.MoveNext() in /Users/builder/azdo/_work/1/s/macios/tests/monotouch-test/System.Net.Http/NSUrlSessionHandlerTest.cs:line 47 --- End of stack trace from previous location --- at TestRuntime.TryRunAsync(TimeSpan timeout, Task startTask, Task completionTask, UIImage imageToShow, Exception& exception) in /Users/builder/azdo/_work/1/s/macios/tests/common/TestRuntime.RunAsync.cs:line 119> at MonoTests.System.Net.Http.NSUrlSessionHandlerTest.DisposeAndRecreateBackgroundSessionHandler() in /Users/builder/azdo/_work/1/s/macios/tests/monotouch-test/System.Net.Http/NSUrlSessionHandlerTest.cs:line 60

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Pull request overview

This PR adds handling for intermittent test failures in NSUrlSessionHandlerTest.DisposeAndRecreateBackgroundSessionHandler when the background transfer service is already in use by another process. The test now ignores these transient failures instead of failing.

Changes:

Added a helper method to detect and ignore the specific NSUrlError.BackgroundSessionInUseByAnotherProcess exception
Integrated the helper method into both request validation points in the test

…ound-service-in-use

vs-mobiletools-engineering-service2 · 2026-01-23T01:11:06Z

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vs-mobiletools-engineering-service2 · 2026-01-23T08:24:45Z

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vs-mobiletools-engineering-service2 · 2026-01-23T08:46:29Z

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vs-mobiletools-engineering-service2 · 2026-01-23T08:58:27Z

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vs-mobiletools-engineering-service2 · 2026-01-23T09:12:16Z

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vs-mobiletools-engineering-service2 · 2026-01-23T15:53:25Z

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rolfbjarne requested a review from Copilot January 22, 2026 15:57

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Merge remote-tracking branch 'origin/main' into dev/rolf/tests-backgr…

35a2421

…ound-service-in-use

rolfbjarne enabled auto-merge (squash) January 23, 2026 00:27

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rolfbjarne merged commit 6bcf0b3 into main Jan 23, 2026
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[tests] Ignore NSUrlSessionHandlerTest.DisposeAndRecreateBackgroundSessionHandler if the background session is in use. #24545

[tests] Ignore NSUrlSessionHandlerTest.DisposeAndRecreateBackgroundSessionHandler if the background session is in use. #24545

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vs-mobiletools-engineering-service2 commented Jan 23, 2026

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✅ [CI Build #35a2421] Build passed (Build macOS tests) ✅

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💻 [CI Build #35a2421] Tests on macOS X64 - Mac Sonoma (14) passed 💻

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💻 [CI Build #35a2421] Tests on macOS M1 - Mac Monterey (12) passed 💻

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💻 [CI Build #35a2421] Tests on macOS M1 - Mac Ventura (13) passed 💻

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💻 [CI Build #35a2421] Tests on macOS arm64 - Mac Sequoia (15) passed 💻

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💻 [CI Build #35a2421] Tests on macOS arm64 - Mac Tahoe (26) passed 💻

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