Jest

Definitions

1. A JavaScript testing framework that provides test execution, assertions, mocking, snapshot testing, and parallelized runs out of the box. It is commonly used in Node and frontend projects because it bundles many testing utilities that otherwise require separate libraries.

   In plain English: It is a tool developers use to automatically test JavaScript code.

   Example: "The component refactor is safe; Jest snapshots and the behavior tests both passed in CI."

Related Terms

• TypeScript
• Webpack
• Vite
• Node.js
• Unit Test
• Mocking
• PHPUnit
• JUnit
• Performance Testing
• Seed Data
• Template Literal
• Test Utility
• Var
• Assertion Library
• Build Matrix