Example of simple integration test using Backbone.js

example-test.js

it("should list all persons in response", function() {

  // fetch an Ajax response
  var response = readFixtures("responses/persons.json");
  var options = {}; // no additional options for the Ajax request

  // create our view, sending in an empty collection
  var view = new PersonsView({ collection: new Persons() });
  view.render(); // show header and other static stuff

  // mock out all requests (this is our core test abstraction),
  // i.e. what this function does is responding to all Ajax requests in
  // the callback with the same response and with the same options.
  // Thus, when `fakeResponse` is finished, all Ajax requests will have
  // responded, and as we listen for finished Ajax requests in our view,
  // we will then have properly set up our PersonsView.
  fakeResponse(response, options, function() {
    view.collection.fetch(); // trigger Ajax request
  });

  // ensure that all persons are present
  expect(view.$('.persons li').length).toEqual(20);

});