When you have a test that you know will fail, do you skip it, or mark it as an expected failure? Or should you wait until the test is passing before adding it to your test suite?
pytest offers two separate but distinct markers for tests that you know won't succeed: skipif and xfail. In this talk, I'll explore the differences between these two markers, and some strategies you can employ to make the best use of each. I'll also briefly touch on how to translate this approach into the unittest framework, since the underlying concepts are mostly transferable.
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