Test Assertions, Specs, and Suites

Writing Mocha test specifications

With practically everything else in place, we finally turn to writing test specifications. Mocha BDD specifications are declared using the it() function with the following function signature:

it(description, callback);

The description string, by convention, is a statement of the expected behavior under test, and the callback function executes the tests. For example, assuming we have an empty this.notes collection variable, a test of the default values in App.Collections.Notes can be as simple as the following:

it("has default values", function () {
  expect(this.notes).to.be.ok;
  expect(this.notes).to.have.length(0);
});

Asynchronous behavior in tests

Although basic test specifications are quite simple, flow control complications arise when testing asynchronous application code. Given that the Backbone.js application's behavior is quite often asynchronous/event-driven, we need to have a solid and straightforward test approach.

Fortunately, Mocha provides an...

Tech Concepts

Programming languages

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

Backbone.js Testing

By : Ryan Glenn Roemer

Backbone.js Testing

By: Ryan Glenn Roemer

Overview of this book

Writing Mocha test specifications

Asynchronous behavior in tests

Backbone.js Testing

By : Ryan Glenn Roemer

Backbone.js Testing

By: Ryan Glenn Roemer

Overview of this book

Writing Mocha test specifications

Asynchronous behavior in tests

Confirmation

Buy this book with your credits?

Submit Your Feedback

Create a Free Account To Continue Reading

Sign in to activate your 7-day free access