Modern Python Projects Transcripts
Chapter: Testing code
Lecture: Summary
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In this chapter, I showed you how to use pytest, the most popular testing framework for Python. Since we saw a lot of different features,
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let me give you a short summary. The most important features of pytest are simple assertions,
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so you don't have to remember different types of assertions, and everything can be achieved with a simple assert statement.
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Also, Discovery of tests, Writing your first test is easy. Just add a test_ prefix to the name of the function and put that
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function inside the file, that is also prefix with test _. That way, pytest will automatically recognize that it's a test function.
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So no need to create a test class if you don't really need it. Plenty of CLI options, pytest has a very extensive set of parameters that you can pass
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when you run in the terminal. Easy to use fixtures, Using fixtures in pytest is quite easy.
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All you have to do is to decorate the function with pytest .fixture, and that's it. Now you can use this fixture in your tests,
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and also pytest comes with some building fixtures. You can easily mark tests across all the files, marks are a great way to split
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your tests into different groups. For example, if some of your end to end tests are slow and you want to run them only on the CI server,
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you can mark them as slow and exclude them from running on your computer. Plugins are a true power of pytest.
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If some feature didn't make it to the main pytest module, there is a huge chance that there is a plugin that you can use.
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There are plugins to run tests in parallel, using multiple code, to generate the test coverage for your code or even to print the
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test reproducing emoji. And if you want, you can always write your own plugin to further extend the functionality of pytest.
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And finally, pytest is compatible with unit test, so you can switch and your
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old test will still work. Then you can gradually replace the unit test with the pytest version.