#assert

Snapshot testing for a herd of CLI tests

Filesystem fixtures and assertions.

PHPStan extension for beberlei/assert

Compile-time tests for types. Useful to make sure types don't regress into being overly-permissive as changes go in over time.

Type check values

Fluent, fully-typed assertion library for Python: type-narrowing assertions, contract testing, composable matchers, and structural matching.

A lightweight TypeScript library providing type-safe assertions, type guards, and error handling utilities.

0-Deps, simple, fast, for browser and node js object schema validator

Thin assertion library for use in libraries and business-model

A simple and composable way to validate data in JavaScript (and TypeScript). Forked by MetaMask to fix ESM compatibility.

The SauceLabs DesiredOption factory. Makes SauceLabs easy.

A library for small and convenient utility methods