organizing_tests.md

Organizing Tests

Exercise 1: Test Classes

Structure some of the tests you have written by placing them in a class. Make sure the name of the class starts with the word Test.

Indent your test functions so that they belong to the class. Add self as the first parameter of each function:

class TestDummy:

    def test_dummy(self):
        assert ...

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Exercise 2: Test collection

Run all tests written so far by simply typing

python -m pytest

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Exercise 3: Test selection

Run only one test file:

python -m pytest FILE_NAME

Run only one test class:

pytest -m pytest FILE_NAME::CLASS_NAME

Finally, run a single test:

pytest -m pytest FILE_NAME::CLASS_NAME::TEST_NAME

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Exercise 4: Options

Find out which options of pytest do the following:

more verbose output | re-run failing tests | stop on first test that fails

pytest --lf
pytest -v
pytest -x