How do I use Jest for testing my JavaScript code?

How do I use Jest for testing my JavaScript code?

Jest is a delightful JavaScript testing framework. To get started, you can install it using npm with the command: npm install --save-dev jest.

What are some basic features of Jest?

Jest offers features like zero configuration, snapshot testing, and a powerful mocking library. It also runs tests in parallel for faster execution.

Can you show me a simple test example?

Sure! Here's a simple test for a function that adds two numbers:

function add(a, b) {
  return a + b;
}

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

How do I run my tests?

You can run your tests by adding a script in your package.json like this: "scripts": { "test": "jest" } Then, run npm test in your terminal.