How to use logging, pytest fixture and capsys?

Question

I am trying to unit-test some algorithm that uses logging library.

I have a fixture that creates a logger.

In my 1st test case, I do not use

Answer 1

I'm guessing the logger gets created (via the fixture) before the capsys fixture is set up.

Some ideas:

• Use the pytest-catchlog plugin
• Maybe reverse logger, capsys
• Make logger request the capsys fixture
• Use capfd which is more lowlevel capturing without altering sys