How do I mock functions in Sinon.js?

How do I mock functions in Sinon.js?

You can use Sinon.js to create mocks, stubs, and spies. For mocking a function, you can use sinon.mock().

Can you show me an example of mocking a function?

Sure! Here's a simple example:

const sinon = require('sinon');

const myObject = {
  myMethod: function() { return 'original'; }
};

const mock = sinon.mock(myObject);
mock.expects('myMethod').returns('mocked');

console.log(myObject.myMethod()); // Outputs: mocked
mock.verify();

What is the difference between a stub and a mock?

A stub is a function that replaces another function and can control its behavior, while a mock is a more complex object that can also verify how it was called.

Can I use Sinon.js with other testing frameworks?

Yes, Sinon.js can be used with various testing frameworks like Mocha, Jasmine, and Jest.