Testing

Get the native type of a value.

Regular expression for matching ANSI escape codes

Get the first fulfilled promise that satisfies the provided testing function

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

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

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

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

Regular expression for matching a shebang line

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

Get details about the current Continuous Integration environment

Returns true if a string has an extglob.

Check if a value is a plain object

HTTP response freshness testing

Delightful JavaScript Testing.

test for inclusion or exclusion of paths using globs

Check if a value is an object

Detect if the current environment is a CI server

Parameterised tests for Jest

Delightful JavaScript Testing.

Delightful JavaScript Testing.

Delightful JavaScript Testing.

Extended glob support for JavaScript. Adds (almost) the expressive power of regular expressions to glob patterns.

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

A well-tested CSS minifier

Type check values

A library of cross-platform tested terminal/console command strings for doing things like color and cursor positioning. This is a subset of both ansi and vt100. All control codes included work on both Windows & Unix-like OSes, except where noted.

Generate a regex from a string or array of strings.

Check if a string has ANSI escape codes

Create a javascript regular expression for matching everything except for the given string.

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

invariant

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

Accessibility engine for automated Web UI testing

Highly configurable, well-tested, JavaScript-based HTML minifier.

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

unist utility to check if a node passes a test

Tests whether one path is inside another path

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

Miller Rabin algorithm for primality test

Regular expression for matching IP addresses (IPv4 & IPv6)

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

string-argv parses a string into an argument array to mimic process.argv. This is useful when testing Command Line Utilities that you want to pass arguments to.

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

TypeScript definitions for @testing-library/jest-dom

Custom jest matchers to test the state of the DOM

Fire events the same way the user does

simple, flexible, fun test framework