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.