mocha-sinon-chai.js

var chai = require('chai');
var expect = chai.expect;
var sinon = require('sinon');
var sinonChai = require('sinon-chai');
chai.use(sinonChai);



var eventBus = (function () {
	var _eventHandler = null;
	return {
		registerEventHandler: function(eventHandler) {
			_eventHandler = eventHandler;
		},
		emit: function() {
			_eventHandler();
		}
	}
})();


describe('EventBus', function () {
	it('should call all registered EventHandler', function () {
		var callback = sinon.spy();
		eventBus.registerEventHandler(callback);
		//eventBus.emit();
		expect(callback).to.have.been.called;
	});
});