Testing Patterns Skill

Testing patterns provide standardized structures for unit, integration, regression, and smoke tests across Python (pytest) and TypeScript (Jest/Vitest). This Skill consolidates best practices including test organization, fixtures, isolation strategies, and CI workflows to accelerate quality assurance across both languages.

Pytest fixtures enable reusable setup and teardown routines that isolate tests and reduce duplication. This Skill provides templates for fixture design, data validation patterns, and isolation strategies that ensure deterministic, reproducible test results across development, CI, and release pipelines.

Yes. This Skill describes regression automation patterns that maintain deterministic results and reproducible environments. It covers test orchestration, framework-specific approaches for pytest and Jest/Vitest, and CI integration to standardize regression workflows across codebases.

Generate coverage with `pytest --cov=src tests/` for Python or your TypeScript test runner's coverage tool. This Skill provides practical examples of coverage setup alongside test structure templates and CI workflows to measure and track code quality.

This Skill covers pytest for Python and Jest/Vitest for TypeScript, providing cross-language testing patterns, framework-specific best practices, and scaffold examples for unit, integration, regression, and smoke tests tailored to each framework's conventions.

These patterns serve teams at intermediate implementation depth. They assume familiarity with basic testing concepts but provide structured templates, setup routines, and real-world scaffolds that accelerate test creation for Claude Family projects without requiring advanced expertise.