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javascript-testing-patterns

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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name:javascript-testing-patternsdescription: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.

JavaScript Testing Patterns

Comprehensive guide for implementing robust testing strategies in JavaScript/TypeScript applications using modern testing frameworks and best practices.

Use this skill when

  • Setting up test infrastructure for new projects

  • Writing unit tests for functions and classes

  • Creating integration tests for APIs and services

  • Implementing end-to-end tests for user flows

  • Mocking external dependencies and APIs

  • Testing React, Vue, or other frontend components

  • Implementing test-driven development (TDD)

  • Setting up continuous testing in CI/CD pipelines

    • Do not use this skill when

  • The task is unrelated to javascript testing patterns

  • You need a different domain or tool outside this scope

    • Instructions

  • Clarify goals, constraints, and required inputs.

  • Apply relevant best practices and validate outcomes.

  • Provide actionable steps and verification.

  • If detailed examples are required, open resources/implementation-playbook.md.

    • Resources

  • resources/implementation-playbook.md for detailed patterns and examples.