Test runner thread initialization

[HrvojeFER]

Hello!
I just have a couple of questions about concurrent environments.

I am using a library for which I have to run everything on a separate thread that needs initialization. However, in order to debug and test everything properly, I need to initialize the test runner thread as well.

My questions are:
Are all the test fixtures, test cases, and subcases run on the same thread?
Are they all run on the same thread from which we implement doctest with DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN?
The reason is that I could just run the thread initialization in my main doctest implementation and not worry about it later.

Thank you in advance!

Extra information

• doctest version: v2.4.1
• Operating System: Windows
• Compiler+version: Visual Studio Community 2019

[onqtam]

Are all the test fixtures, test cases, and subcases run on the same thread?

Yes, they are all ran from whichever thread doctest::Context::run() is called - sequentially.

Are they all run on the same thread from which we implement doctest with DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN?

DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN just drags the implementation of the test runner into the respective translation unit in order to be compiled - the thread the tests will be running from is the one from which you call doctest::Context::run() on your doctest context and that depends entirely on your preference.

FYI (perhaps unrelated): doctest supports asserts and logging from multiple threads within a single test case.

Let me know if this helps!

[HrvojeFER]

This is exactly the information I was looking for.
Thank you for the reply and for the wonderful doctest library! 😄