13. Test Organization

Overview

Markers Markers tag tests so you can selectively run subsets instead of the entire suite every time. python ... ... bash Custom markers need to be registered in pytest.ini (Chapter 15) or pytest will emit a warning about unknown markers. What it does: Attaches a tag to a test function, usable later to filter which tests run. Types/params: Pointers: Use consistent, small marker vocabulary across the team (smoke, regression, critical) rather than ad-hoc one-off tags — otherwise -m filtering becomes unreliable. Parametrized tests Instead of writing near-identical test functions for different inputs, parametrize one test function to run multiple times with different data. python ("", "validpass", "Username is required"), ("validuser", "", "Password is required"), ("validuser", "wrongpass", "Invalid credentials"), ]) This runs as three separate test cases in the report, each clearly showing which input combination passed/failed — far more maintainable than three nearly-identical copy-pasted test functions.