Using py.test with coverage doesn't include imports

Question

For Jedi we want to generate our test coverage. There is a related question in stackoverflow, but it didn\'t help.

We\'re using py.test as a test runner. However, w

Answer 1

@hynekcer gave me the right idea. But basically the easiest solution lies somewhere else:

Get rid of pytest-cov!

Use

coverage run --source jedi -m py.test
coverage report

instead!!! This way you're just running a coverage on your current py.test configuration, which works perfectly fine! It's also philosophically the right way to go: Make each program do one thing well - py.test runs tests and coverage checks the code coverage.

Now this might sound like a rant, but really. pytest-cov hasn't been working properly for a while now. Some tests were failing, just because we used it.

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As of 2014, pytest-cov seems to have changed hands. py.test --cov jedi test seems to be a useful command again (look at the comments). However, you don't need to use it. But in combination with xdist it can speed up your coverage reports.