// KM.throttle()
describe("KM.throttle(method, context) method", function(){

	beforeEach(function() {
    jasmine.clock().install();
  });

	afterEach(function() {
    jasmine.clock().uninstall();
  });

	it("should return a function that will only invoke an input method when the time step is greater than 100ms", function(){
		var a = 0,
				increaseA = function() {
					a++;
				},
				throIncA = KM.throttle(increaseA);

		expect(throIncA instanceof Function).toBe(true);

		throIncA();
		jasmine.clock().tick(50);
		expect(a).toBe(0);
		throIncA();
		jasmine.clock().tick(80);
		expect(a).toBe(0);
		throIncA();
		jasmine.clock().tick(101);
		expect(a).toBe(1);
	});
});

// KM.getData()
describe("KM.getData(element) method", function(){
	var domElem1 = document.createElement("div"),
			checkAttr = function(elem) {
				for(var prop in elem) {
					if(prop.indexOf("data-") >= 0){
						return true;
					}
				}
				return false;
			};
	it("can give an DIY property whose value is unique called guid to the input element", function(){
		expect(checkAttr(domElem1)).toBe(false);
		KM.getData(domElem1);
		expect(checkAttr(domElem1)).toBe(true);
	});

	it("can return an object containing the information about the element", function(){
		var data = KM.getData(domElem1);
		data.dispatcher = function(){};
		var data1 = KM.getData(domElem1);
		expect(data1 instanceof Object).toBe(true);
		expect(data1.dispatcher instanceof Function).toBe(true);
	});
});

// KM.removeData()
describe("KM.removeData(element) method", function() {
	var domElem1 = document.createElement("div"),
			data = KM.getData(domElem1);

	data.dispatcher = function(){};

	it("can remove the data binded on the element", function(){
		expect(data.dispatcher instanceof Function).toBe(true);
		KM.removeData(domElem1);
		data = KM.getData(domElem1);
		expect(data.dispatcher).toBeUndefined();
	});
});

// KM.isFunction()
describe("KM.isFunction(fn) method", function(){
	it("return ture if the input is a function no matter on what browser", function(){
		var func = function(){};
		expect(KM.isFunction(func)).toBe(true);
	});
});

//KM.EventUtil.addEventListener()
describe("KM.EventUtil.addEventListener(element, type, handler) method", function(){

	it("can push the handler into the handler array which is KM.getData(element).handlers[type]", function(){
		var domElem = document.createElement("div"),
				type = "click",
				data = KM.getData(domElem);
		expect(data.handlers).toBeUndefined();
		KM.EventUtil.addEventListener(domElem, type, function(){});
		expect(data.handlers instanceof Object).toBe(true);
	});

	it("can add the dispatcher() function as a property of the element", function(){
		var domElem = document.createElement("div"),
				type = "click",
				data = KM.getData(domElem);
		expect(data.dispatcher).toBeUndefined();
		KM.EventUtil.addEventListener(domElem, type, function(){});
		expect(data.dispatcher instanceof Function).toBe(true);
	});

	it("can give the input handler a property called guid for tracking", function(){
		var domElem = document.createElement("div"),
				type = "click",
				data = KM.getData(domElem),
		    listener1 = function(){};

		expect(listener1.guid).toBeUndefined();

		KM.EventUtil.addEventListener(domElem, type, listener1);
		expect(typeof listener1.guid).toBe("number");
	});
});

// KM.EventUtil.removeEventListener()
describe("KM.EventUtil.removeEventListener(element, type, handler) method", function(){

	it("can remove the handler from the array, which is KM.getData(element).handlers[type]", function(){
		var domElem = document.createElement("div"),
				type = "click",
				data = KM.getData(domElem),
				listener1 = function(){},
				listener2 = function(){};

		KM.EventUtil.addEventListener(domElem, type, listener1);
		KM.EventUtil.addEventListener(domElem, type, listener2);

		expect(data.handlers[type].length).toBe(2);
		KM.EventUtil.removeEventListener(domElem, type, listener1);
		expect(data.handlers[type].length).toBe(1);
	});
});

// KM.EventUtil.triggerEvent()
describe("KM.EventUtil.triggerEvent(element, event) method", function(){
	var domElem = document.createElement("div"),
			parentElem = document.createElement("div"),
			type = "speak",
			data = KM.getData(domElem),
	    listener1,
	    listener2;

	parentElem.appendChild(domElem);
	listener1 = jasmine.createSpy('listener1');
	listener2 = jasmine.createSpy('listener2');

	it("can trigger the specific event on the element", function(){
		KM.EventUtil.addEventListener(domElem, type, listener1);
		expect(listener1).not.toHaveBeenCalled();

		KM.EventUtil.triggerEvent(domElem, type);
		expect(listener1).toHaveBeenCalled();
	});

	it("and the event can propagate", function(){
		KM.EventUtil.addEventListener(parentElem, type, listener2);
		expect(listener2).not.toHaveBeenCalled();

		KM.EventUtil.triggerEvent(domElem, type);
		expect(listener2).toHaveBeenCalled();
	});
});