Testing

Simple asynchronous testing framework. Never again count your asserts! This tiny testing library is fully callback-based and has a rich API for asserts.

Simple and complete DOM testing utilities that encourage good testing practices.

Custom jest matchers to test the state of the DOM

Fire events the same way the user does

Simple and complete React DOM testing utilities that encourage good testing practices.

Regular expression for matching ANSI escape codes

Get the first fulfilled promise that satisfies the provided testing function

ESLint plugin to follow best practices and anticipate common mistakes when writing tests with Testing Library

Get the native type of a value.

Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js

Stub TypeScript definitions entry for @testing-library/jest-dom, which provides its own types definitions

Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.

Regular expression for matching a shebang line

Pass two numbers, get a regex-compatible source string for matching ranges. Validated against more than 2.78 million test assertions.

Returns `true` if the given string looks like a glob pattern or an extglob pattern. This makes it easy to create code that only uses external modules like node-glob when necessary, resulting in much faster code execution and initialization time, and a bet

Match balanced character pairs, like "{" and "}"

Returns true if a string has an extglob.

Get details about the current Continuous Integration environment

Nest - modern, fast, powerful node.js web framework (@testing)

Check if a value is a plain object

Returns true if a value is a plain object, array or function.

Simple and complete React hooks testing utilities that encourage good testing practices.

HTTP response freshness testing

Give a regex, get a robust predicate function that tests it against a string.

test for inclusion or exclusion of paths using globs

Delightful JavaScript Testing.

Delightful JavaScript Testing.

Parameterised tests for Jest

Delightful JavaScript Testing.

Delightful JavaScript Testing.

Check if a value is an object

Instrumented version of Testing Library for Storybook Interactions

Simple and complete custom Cypress commands and utilities that encourage good testing practices.

Type check values

Accessibility engine for automated Web UI testing

BDD/TDD assertion library for node.js and the browser. Test framework agnostic.

Improved deep equality testing for Node.js and the browser.

In-memory file-system with Node's fs API.

Detect if the current environment is a CI server

A response-like object for mocking a Node.js HTTP response stream

Error constructor for test and validation frameworks that implements standardized AssertionError specification.

invariant

unist utility to check if a node passes a test

A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript

selectors for react testing library

Test whether an object looks like a promises-a+ promise

A well-tested CSS minifier

Simple and complete React Native testing utilities that encourage good testing practices.