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Integrate automated testing into CI/CD pipelines for continuous quality feedback. Use for continuous testing, CI testing, automated testing pipelines, test orchestration, and DevOps quality practices.

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Unit testing, integration testing, and test-driven development principles. Use when writing tests, reviewing test code, improving test coverage, or setting up testing strategy. Triggers on "write...

Evaluate test suite quality by introducing code mutations and verifying tests catch them. Use for mutation testing, test quality, mutant detection, Stryker, PITest, and test effectiveness analysis.

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Expert knowledge for testing Substreams applications. Covers unit testing, integration testing, performance testing, and FireCode tools usage.

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Plan, run, and synthesize usability tests and produce a Usability Test Pack (test plan, tasks/script, logistics, notes template, issue log, findings + recommendations). Use for usability test,...

Frontend testing rules with Vitest, React Testing Library, and MSW. Includes coverage requirements, test design principles, and quality criteria. Use when writing frontend tests or reviewing test quality.

Apply testing philosophy: test behavior not implementation, minimize mocks, AAA structure, coverage for confidence not percentage. Use when writing tests, reviewing test quality, discussing TDD,...

Automatically generates comprehensive test suites (unit, integration, E2E) based on code and past testing patterns. Use when user says "write tests", "test this", "add coverage", or after fixing...

Create test plans, write tests, validate code quality through testing

Good tests give you confidence to ship. Bad tests give you a false sense of security while slowing you down. The goal isn't 100% coverage - it's the right tests for the right things. This skill...

Principles for writing effective, maintainable tests. Covers naming conventions, assertion best practices, and comprehensive edge case checklists. Based on BugMagnet by Gojko Adzic. Triggers on:...