Jasmine shared behavior for asserting that a certain event on an element exposed as a Backbone view property properly executes the expected view instance method

gistfile1.js

function assertViewAction(viewClass, eventCallbackName, elementAccessorName, eventName, viewReference) {
  it("should run the " + eventCallbackName + " action when the " + elementAccessorName + " gets a " + eventName + " event (assertViewAction)", function() {
    var isPrototypal = eventCallbackName in viewClass.prototype;
    if (isPrototypal) {
      spyOn(viewClass.prototype, eventCallbackName);
    }
    var view = viewReference();
    if (!isPrototypal) {
      spyOn(view, eventCallbackName);
    }
    view.delegateEvents();
    var eventTarget = view[elementAccessorName];
    expect(eventTarget).toBeDefined();
    if(eventTarget.jQuery) {
      expect(eventTarget.length).toBeGreaterThan(0);
    }
    eventTarget.trigger(eventName);
    expect(view[eventCallbackName]).toHaveBeenCalled();
  });
}

// Example use:
assertViewAction(MyView, "openPopup", "$popupOpenerButton", "click", function() {
  var model = new MyModel({name: "Jay"});
  var html = $(readFixture("some_html_fixture"));
  return new MyView({el: html, model: model});
});