TestContext.WriteLine or Console.WriteLine when running on a different thread is not attached to the correct test from MsTest.Sdk/3.8.0 and forward

[mattiasstrom]

Hi,

We us MsTest for integration testing involving communication with hardware and in our case multiple threads are needed. Up until MsTest.Sdk/3.7.0 the test outputs was assigned to the correct test method.
From 3.8.0 and above the logs are assigned to the first or last test or not show at all depending on which version used.

I've attached a simple demo project. Changing from sdk 3.7.0 to 3.8.0 or 3.11.0 in the project file will cause the Standard output logs from the workerthread to show only for Mehod1 in the Test1 and Test2 class

I might be wrong but I think this changes in this file may affect the result
https://github.com/microsoft/testfx/blob/main/src/Adapter/MSTestAdapter.PlatformServices/Services/TestContextImplementation.cs

[Edit, updated to a simpler example that illustrates the issue]
I expect this to be logged for every test method:
In EventHandler: ContextId: TestsAndLogging.Test1, Current Count: 1

TestsAndLogging.zip

I have google a lot but can't find any up to date source giving an example of how to make the output logs to be assigned to the correct text output i a multithreaded usecase

Regards Mattias

[Youssef1313]

It's not about being on a different thread. If you are on the correct ExecutionContext, or writing to the correct TestContext, it should work.

[mattiasstrom]

Thanks for the quick reply!

I have verified that the correct TestContext is used but when Test.Context.WriteLine is called from another thread it works in the first test method in the class, the following ones in the same class fails to write any logs from different threads.

I've tried to create a bare minimum test project to illustrate the issue.
This works with MSTest.Sdk/3.7.0 but not above. So change the commented out lines in the project file.

I expect this to be logged for every test method:
In EventHandler: ContextId: TestsAndLogging.Test1, Current Count: 1

Test project:
TestsAndLogging.zip

Regards

[mattiasstrom]

I redirect the discussion to this post:
https://stackoverflow.com/questions/79791207/for-mstest-sdk-v3-8-0-and-above-logs-from-another-thread-not-assiged-to-correct/79794728#79794728