I like parameterized tests as well. It's a nice way to cover multiple cases, that share the same assert statements.
I'm not great at Python. Is the "test_" at the beginning of the method required for the testrunner to identify the tests, or is it "just" convention?
Yep, that's often the pattern that a test runner looks for! I think most can be customized to find other patterns too, and I recently saw a pytest plugin that makes it easy not to have to type "test" so many times in code you already know is tests.
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