What is unit testing and how do I use Jest for it?

What is unit testing and how do I use Jest for it?

Unit testing is a software testing method where individual units of code are tested. Jest is a popular testing framework for JavaScript.

Can you show me a simple example of a Jest test?

Sure! Here's a basic example:

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 Jest tests?

You can run your Jest tests by using the command npm test or jest in your terminal, depending on your setup.

What are some best practices for writing unit tests?

Some best practices include writing clear and descriptive test names, keeping tests isolated, and testing edge cases.