Implement comprehensive testing strategies using Jest, Vitest, and Testing Library for unit tests, integration tests, and end-to-end testing with mocking, fixtures, and test-driven development. Use when writing JavaScript/TypeScript tests, setting up test infrastructure, or implementing TDD/BDD workflows.
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tessl review fix ./tests/ext_conformance/artifacts/agents-wshobson/javascript-typescript/skills/javascript-testing-patterns/SKILL.mdThe canonical home for this skill is javascript-testing-patterns in wshobson/agents
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