An ESLint plugin that enforces best practices and catches common errors in Jest test suites.
eslint-plugin-jest is an ESLint plugin that provides linting rules specifically for Jest test files. It helps developers write better tests by enforcing best practices, catching common errors, and maintaining consistency across test suites. The plugin integrates seamlessly with ESLint to analyze test code for issues like disabled tests, invalid expectations, and stylistic problems.
JavaScript and TypeScript developers who use Jest for testing and want to improve their test code quality through static analysis. It's particularly valuable for teams seeking consistent testing patterns and early error detection in CI pipelines.
Developers choose eslint-plugin-jest because it offers a comprehensive, community-maintained rule set tailored to Jest's API, preventing common testing pitfalls. Its shareable configurations and compatibility with modern ESLint setups make it easy to adopt, while TypeScript support ensures it works in typed codebases.
ESLint plugin for Jest
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Rules like `no-focused-tests` and `valid-expect` catch runtime errors early, preventing accidentally committed test configurations and invalid assertions.
Offers type-aware rules that safely fall back for JavaScript projects, supporting mixed codebases without breaking changes.
Supports both legacy `.eslintrc` and flat `eslint.config.js` formats, ensuring compatibility with ESLint's evolving configuration systems.
Includes shareable `recommended` and `style` configs for quick setup, reducing manual rule selection and enforcing consistency.
Primarily designed for Jest; while it supports aliases for frameworks like Vitest, the README warns that semantics may not hold, limiting cross-framework use.
Requires explicit setup to apply rules only to test files via overrides or file patterns, which can be cumbersome and error-prone in complex projects.
The `all` configuration may change in any release, as noted in the README, making it unsuitable for installations needing long-term consistency.