Async Jasmine Test

test.js

describe('A Jasmine test', function() {
  
  it('should be able to test async functions', function() {
    
    // variable to check if our function call was successful
    var wasSuccessful = null;
    
    // Dummy Backbone model
    var testModel = new TestModel();
    
    runs(function() {
      // someAsyncFunction is an async function that calls the 'success' function in our params object
      // if the call was successful. It calls the 'error' function in our params object otherwise.
      testModel.someAsyncFunction({
        data: 'test',
        success: function() {
          wasSuccessful = true;
        },
        error: function() {
          wasSuccessful = false;
        }
      });
    });
    
    var timeout = 2000;
    
    waitsFor(function() {
      return wasSuccessful;
    }, 'Async call should be a success', timeout);
    
    runs(function() {
      expect(wasSuccessful).toBe(true);
    });
    
  });
});