testing

name	testing
description	pytest testing standards: naming, fixtures, isolation, and parametrize patterns.
when_to_use	When writing or reviewing test files in tests/ or matching *test*.py.
user-invocable	false
hub-skill-ids	["review"]

Skill: Testing

Framework

pytest — uv run pytest -q

Rules

REQUIRE:

• Tests for all public functions and behavior changes
• Descriptive test names: test_<subject>_<condition>_<expected_outcome>
• Use tmp_path fixture for filesystem-touching tests
• Isolated tests: no shared mutable state between tests

REJECT if:

• Tests call external services without mocking
• Empty test body
• Tests depend on execution order

PREFER:

• pytest.mark.parametrize over repeated similar test functions
• Factory fixtures over inline setup in each test
• conftest.py for shared fixtures within a package