Jest

JavaScript testing framework with a focus on simplicity

Jest is a JavaScript testing framework with a focus on simplicity. It works with projects using Babel, TypeScript, Node, React, Angular, and Vue.

Tutorial

How to write React applications in TypeScript using TDD, highlighting features of the IDE

Part of tutorial

Make a very simple class component with local counter state, then make a type definition for that state.

Part of tutorial

Use the visual debugger in the IDE for smarter TDD.

Part of tutorial

Follow the React pattern of container/presentation components by refactoring the code and tests.

Part of tutorial

Create a React+TypeScript project with the create-react-app scaffolding tool.

Part of tutorial

Add event handling to a stateful class component by first writing tests during development.

Part of tutorial

Test-first development with Jest in the IDE.

Tip

Learn how to run a single test right from the editor.

Tip

In a test file, hover over an error to get more information about it.

Tip

Use the Structure tool window for quick navigation around large test files.

Tip

Use the Go to Symbol popup to go to a test.