Jest: In this Jest tutorial

In this Jest tutorial, we will learn about various Jest features, Jest matchers and how to use Jest framework for JavaScript Unit Testing . Jest is a JavaScript testing framework developed by Facebook, designed primarily for unit testing React applications. However, it can be used for testing any JavaScript codebase. Jest - Basic Assertions In Jest , assertions are used to check if the values in your tests meet the expected conditions. Below, we will cover the most commonly used assertions in Jest and provide examples of how to use them. Using toBe () for Exact Equality The toBe () matcher checks if a value is exactly equal to another value, which works well for primitive types like numbers or strings. In your test files, Jest puts each of these methods and objects into the global environment. You don't have to require or import anything to use them. However, if you prefer explicit imports, you can do import {describe, expect, test} from '@ jest /globals'.