In this chapter, we introduced an application and test structure suitable for development, gathered the Mocha, Chai, and Sinon.JS libraries, and created some basic tests to get things started. Then, we reviewed some facets of the Mocha test reporter and watched various tests in action—passing, slow, timeouts, and failures.

In the next chapter, we will integrate a Backbone.js application as the target of our test framework and learn how to test, isolate, and verify program behavior throughout the course of application development.