![]() To follow along, you will need to install: To demonstrate Jest’s testing capabilities, we will use the project from a previous LogRocket article titled, Using Sequelize with TypeScript. In this article, we will implement some of the functionality that Jest has to offer. It provides functionality like assertions, mocking, spies, running tests in parallel, prioritizing failed tests, and coverage analysis. Jest is a simple, lightweight testing framework that provides a variety of testing capabilities to JavaScript and TypeScript projects. JavaScript has a lot of testing frameworks available that can be used across projects developed in React, Angular, Node.js, and TypeScript but today, we will look at one testing framework in particular called Jest. ![]() During testing, we determine the expectations and test cases for our application and check that they are met. Testing is an important aspect of software engineering. ![]()
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