Pass two numbers, get a regex-compatible source string for matching ranges. Validated against more than 2.78 million test assertions.
Extra assertions on top of node's assert module
Type check values
The assert module from Node.js, for the browser.
Support for import assertions in acorn
Allow parsing of the module assertion attributes in the import statement
String validation and sanitization
simple, flexible, fun test framework
A tiny invariant function
BDD/TDD assertion library for node.js and the browser. Test framework agnostic.
Error constructor for test and validation frameworks that implements standardized AssertionError specification.
A little library for asserting types and values.
Validate XML, Parse XML, Build XML without C/C++ based libraries
TypeScript implementation of invariant(condition, message)
Lazy assertions without performance penalty
flow typed nullthrows
Adaptation of react-addons-shallow-compare, for independent usage
TypeScript definitions for http-assert
typesafe assertion library for TypeScript 3.7+
Featherweight assert module
assert with status codes
Better assertions for node, reporting the expr, filename, lineno etc
Next-gen browser and mobile automation test framework for Node.js
Extends Chai with assertions about promises.
uvu is an extremely fast and lightweight test runner for Node.js and the browser
Helper function for exhaustive checks of discriminated unions in TypeScript
test framework agnostic BDD-style assertions
Cross-browser type assertions (less broken typeof)
Extends Chai with assertions for the Sinon.JS mocking framework.
Format errors to display a diff between the actual and expected
Function argument validation for humans
Additional Jest matchers
Hook and modify stdout and stderr
Precondition checking utilities.
tap-producing test harness for node and browsers
Type assertions aka less-broken typeof.
Extend Chai Assertion library with tests for http apis
Testing Matchers for Enzyme
Runtime Environment for enzyme tests in jest
Power Assert feature enhancer for assert function/object