quality-tools

Advanced mocking patterns for Jest and Vitest including module mocking, spies, and fake timers. PROACTIVELY activate for: (1) Module mocking, (2) Partial mocking with spies, (3) Mock lifecycle management, (4) Fake timers for time-dependent code, (5) Complex mock implementations. Triggers: "jest.mock", "vi.mock", "spyOn", "fakeTimers", "mockImplementation", "mockReturnValue", "mock lifecycle"

Ruff linting rules, security patterns, mypy type checking, and Python code review best practices. PROACTIVELY activate for: (1) Setting up Ruff linting, (2) Fixing security vulnerabilities, (3) Resolving mypy type errors, (4) Code review for anti-patterns, (5) Python best practices enforcement. Triggers: "ruff", "lint", "refactor", "security", "anti-pattern", "python review", "mypy", "type error"

Pytest fixtures, parametrization, mocking, and test organization patterns. PROACTIVELY activate for: (1) Writing pytest test suites, (2) Creating fixtures, (3) Implementing parametrized tests, (4) Mocking external dependencies, (5) Organizing test directories. Triggers: "pytest", "fixture", "parametrize", "mock", "python test", "unittest", "conftest"

Testing pyramid, quality metrics, and technical debt management strategies. PROACTIVELY activate for: (1) Designing testing strategy, (2) Evaluating code quality metrics, (3) Managing technical debt, (4) Analyzing test coverage approaches, (5) Calculating complexity. Triggers: "testing strategy", "testing pyramid", "quality metrics", "technical debt", "cyclomatic complexity", "maintainability", "coverage principles"

Test coverage analysis, gap identification, and coverage configuration for Python and JavaScript. PROACTIVELY activate for: (1) Analyzing coverage reports, (2) Identifying critical coverage gaps, (3) Configuring coverage tools, (4) Setting up CI/CD coverage checks, (5) Branch coverage analysis. Triggers: "coverage", "uncovered", "pytest-cov", "istanbul", "c8", "coverage report", "coverage gap"