Playing with spok inside Cypress

Uncommonly extensible assertions for the beautiful people

A type-safe assertion library for JavaScript and TypeScript.

🐷 Poku makes testing easy for Node.js, Bun, Deno, and you at the same time.

soft assertion

poll until an assertion succeeds

A TypeScript library that provides borrowing mechanisms via assertion functions

Decorator Contracts is a library that provides the ability to create and assign Code Contracts to ECMAScript and TypeScript classes. This enables enforcement of the Liskov substitution principle and the Open-closed principle of SOLID to support Design By Contract™.

Runtime type assertions that return

Simple lightweight library for enhancing plain JS objects with TypeScript wrappers enabling easy API data assertion and validation.

Test-agnostic assertion library for ROBLOX.

A tiny invariant function

TAP plugin for JSON schema

Santi's Assertion Library. Official repo for NPM package @santi100a/assertion-lib.

🔥 TypeScript type assertion plugin for vitest

Typescript testing library with pipeline-like testing feature

🔥 Micro TypeScript assertion (test) library.

Assertion collection for JavaScript data

Simple utility for runtime type checking which also assigns the correct type if used with TypeScript.