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Found 194 Skills
Jest testing best practices for JavaScript and TypeScript applications, covering test structure, mocking, and assertion patterns.
Test Node.js applications with Jest including unit tests, integration tests, mocking, code coverage, and CI/CD integration
Best practices for writing JavaScript/TypeScript tests using Jest, including mocking strategies, test structure, and common patterns.
Jest with TypeScript - Industry standard testing framework with 70% market share, mature ecosystem, React Testing Library integration
Generates Jest unit and integration tests in JavaScript or TypeScript. Covers mocking, snapshots, async testing, and React component testing. Use when user mentions "Jest", "describe/it/expect", "jest.mock", "toMatchSnapshot". Triggers on: "Jest", "expect().toBe()", "jest.mock", "snapshot test", "JS test", "React test".
ALWAYS use when testing Angular applications with Jest, configuring Jest, or migrating from Jasmine/Karma to Jest.
Comprehensive React component testing with Jest and React Testing Library covering configuration, mocking strategies, async testing patterns, hooks testing, and integration testing best practices
Expert in Jest testing framework, advanced mocking strategies, snapshot testing, async patterns, TypeScript integration, and performance optimization
Testing patterns for Vitest, React Testing Library, and Jest. Routes to component, hook, and integration test examples.
Provides comprehensive guidance for Jest testing framework including test writing, matchers, async testing, mocking, snapshots, configuration, and CLI. Use when the user asks about Jest, needs to write JavaScript/TypeScript tests, mock dependencies, or configure Jest for projects.
Use when writing, reviewing, or debugging Jest + React Testing Library tests, before writing test code or when tests fail
Use this skill when writing unit tests with Jest or Vitest, implementing mocking strategies, configuring test runners, or improving test coverage. Triggers on Jest, Vitest, describe/it/expect, mocking, vi.fn, jest.fn, snapshot testing, test coverage, and any task requiring JavaScript/TypeScript unit testing.