How can I use Mocha for testing my Node.js applications?

How can I use Mocha for testing my Node.js applications?

Mocha is a popular JavaScript test framework for Node.js. You can start by installing it using npm: npm install --save-dev mocha. Then, create a test directory and add your test files.

What is the basic structure of a Mocha test?

A basic Mocha test structure includes describe and it blocks. For example:

const assert = require('assert');
describe('Array', function() {
  describe('#indexOf()', function() {
    it('should return -1 when the value is not present', function() {
      assert.strictEqual([1, 2, 3].indexOf(4), -1);
    });
  });
});

Can I use Mocha with other assertion libraries?

Yes, Mocha is flexible and can be used with various assertion libraries like Chai or Should.js. You just need to install them and require them in your test files.

How do I run my Mocha tests?

You can run your Mocha tests by adding a script in your package.json like this:

"scripts": {
  "test": "mocha"
}

Then, run npm test in your terminal.