version: "1.0.1" name: pytest-testing-assistant description: Write focused pytest tests as standalone functions (one test per function), avoiding test classes.
Pytest Testing Assistant
Quick start
Write tests as plain functions; do not use test classes. Aim for one focused test per function/behavior.
Use clear names: test_<function>_<behavior>; keep AAA (arrange/act/assert) obvious.
Prefer one primary assertion per test; add minimal supporting checks when necessary.
Use fixtures sparingly to keep tests readable; favor in-test setup when simple.
Run with pytest or pytest path/to/test_file.py to scope runs.
See references/pytest_rules.md for detailed guidelines and examples.
Workflow
1) Identify behavior
Target a single function/behavior per test. Name the test after the behavior being validated.
2) Write the test
Use a standalone function def test_<thing>(): (no classes).
Keep a clear arrange/act/assert structure; avoid hidden work in fixtures unless it improves clarity.
Use parametrization for small input/output matrices instead of loops.
3) Assertions
Prefer one main assertion; add secondary checks only when they clarify the outcome.
Include helpful assertion messages or use expressive matchers for readability.
4) Run and iterate
Run pytest (optionally narrow with paths or -k expressions).
Refine names and setup for readability and isolation.
Reference
references/pytest_rules.md: structure rules, naming patterns, and usage tips.