Jest is a delightful JavaScript Testing Framework with a focus on simplicity. Whether you're testing a small script or a large application, Jest provides a seamless testing experience.

Key Features

  • Synchronous and Asynchronous Testing: Jest supports both synchronous and asynchronous tests, making it versatile for different scenarios.
  • Mocking: Jest provides powerful mocking utilities to isolate and test individual parts of your application.
  • Snapshots: Jest can automatically take snapshots of your components, making it easier to maintain consistent UIs.

Getting Started

To get started with Jest, you can follow these simple steps:

  1. Install Node.js and npm (Node Package Manager).
  2. Create a new project using npm init.
  3. Install Jest using npm install --save-dev jest.
  4. Write your tests in a file with a .spec.js or .test.js extension.
  5. Run your tests using jest.

Example

Here's an example of a simple Jest test:

// example.test.js
const add = (a, b) => a + b;

test('adds 1 + 2 to equal 3', () => {
  expect(add(1, 2)).toBe(3);
});

Additional Resources

For more information, you can visit the following resources:

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