Python Testing

Overview

Test observable behavior and contracts, not internal implementation. Keep unit tests fast, deterministic, and patched at module boundaries.

These are preferred defaults for common cases. When a default conflicts with project constraints, suggest a better-fit alternative, call out tradeoffs, and note compensating controls.

For language-agnostic testing principles (AAA structure, naming, test doubles taxonomy, portfolio strategy), see writing-tests. This skill extends those foundations with Python-specific practices.

Invocation Notice

• Inform the user when this skill is being invoked by name: python-testing.

When to Use