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Show Notes
Software tests should be order independent. That means you should be able to run them in any order or run them in isolation and get the same result.
However, system state often gets in the way and order dependence can creep into a test suite.
One way to fight against order dependence is to randomize test order, and with pytest, we recommend the plugin pytest-randomly to do that for you.
The developer that started pytest-randomly and continues to support it is Adam Johnson, who joins us today to discuss pytest-randomly and another plugin he also wrote, called pytest-reverse.
Special Guest: Adam Johnson.
Links:
- pytest-randomly: pytest plugin to randomly order tests and control random.seed
- pytest-reverse: pytest plugin to reverse test order.
- Empirically revisiting the test independence assumption
- pytest-xdist
- factory_boy
- Faker
- NumPy
- Hyrum's Law