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103 lines
3.2 KiB
103 lines
3.2 KiB
describe('EventBus', function() {
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beforeEach(function() {
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var event = this.event = jasmine.createSpyObj('event', [
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'preventDefault',
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'stopPropagation',
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'stopImmediatePropagation'
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]);
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var progressEvent = this.progressEvent = jasmine.createSpyObj('progressEvent', [
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'preventDefault',
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'stopPropagation',
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'stopImmediatePropagation'
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]);
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var eventFactory = this.eventFactory = {
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event: jasmine.createSpy('event').and.returnValue(event),
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progressEvent: jasmine.createSpy('progressEvent').and.returnValue(progressEvent)
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};
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this.xhr = jasmine.createSpy('xhr');
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this.bus = getJasmineRequireObj().AjaxEventBus(eventFactory)(this.xhr);
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});
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it('calls an event listener with event object', function() {
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var callback = jasmine.createSpy('callback');
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this.bus.addEventListener('foo', callback);
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this.bus.trigger('foo');
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expect(callback).toHaveBeenCalledWith(this.progressEvent);
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expect(this.eventFactory.progressEvent).toHaveBeenCalledWith(this.xhr, 'foo');
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expect(this.eventFactory.event).not.toHaveBeenCalled();
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});
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it('calls an readystatechange listener with event object', function() {
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var callback = jasmine.createSpy('callback');
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this.bus.addEventListener('readystatechange', callback);
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this.bus.trigger('readystatechange');
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expect(callback).toHaveBeenCalledWith(this.event);
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expect(this.eventFactory.event).toHaveBeenCalledWith(this.xhr, 'readystatechange');
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expect(this.eventFactory.progressEvent).not.toHaveBeenCalled();
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});
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it('only triggers callbacks for the specified event', function() {
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var fooCallback = jasmine.createSpy('foo'),
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barCallback = jasmine.createSpy('bar');
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this.bus.addEventListener('foo', fooCallback);
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this.bus.addEventListener('bar', barCallback);
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this.bus.trigger('foo');
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expect(fooCallback).toHaveBeenCalled();
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expect(barCallback).not.toHaveBeenCalled();
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});
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it('calls all the callbacks for the specified event', function() {
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var callback1 = jasmine.createSpy('callback');
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var callback2 = jasmine.createSpy('otherCallback');
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this.bus.addEventListener('foo', callback1);
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this.bus.addEventListener('foo', callback2);
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this.bus.trigger('foo');
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expect(callback1).toHaveBeenCalled();
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expect(callback2).toHaveBeenCalled();
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});
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it('works if there are no callbacks for the event', function() {
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var bus = this.bus;
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expect(function() {
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bus.trigger('notActuallyThere');
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}).not.toThrow();
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});
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it('does not call listeners that have been removed', function() {
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var callback = jasmine.createSpy('callback');
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this.bus.addEventListener('foo', callback);
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this.bus.removeEventListener('foo', callback);
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this.bus.trigger('foo');
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expect(callback).not.toHaveBeenCalled();
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});
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it('only removes the specified callback', function() {
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var callback1 = jasmine.createSpy('callback');
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var callback2 = jasmine.createSpy('otherCallback');
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this.bus.addEventListener('foo', callback1);
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this.bus.addEventListener('foo', callback2);
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this.bus.removeEventListener('foo', callback2);
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this.bus.trigger('foo');
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expect(callback1).toHaveBeenCalled();
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expect(callback2).not.toHaveBeenCalled();
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});
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});
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