Sinon.JS

Sinon.JS is a great library created by Christian Johansen, author of the great book, Test-Driven JavaScript Development, to make easy dealing with Stubs, Spies, and Mocks.

Although Jasmine already has support for Stubs and Spies, we are going to use a specific functionality of Sinon.JS to test AJAX requests, its FakeXMLHttpRequest and FakeServer functions.

The main difference between a Stub and a Fake, as you will see with the FakeXMLHttpRequest object, is that a Fake is like a simpler but still complete implementation of a real component, and it is usually set at a system level.

Installing Sinon.JS

Before we dig into the spec implementation, first we need to add Sinon.JS to the project. Go to http://sinonjs.org/ and download the current ...

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