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147 lines
3.9 KiB
147 lines
3.9 KiB
'use strict';
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var tricks = require('../src/js/tricks');
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describe('tricks', function() {
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describe('debounce', function() {
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var spy;
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beforeEach(function() {
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spyOn(window, 'setTimeout');
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spy = jasmine.createSpy('debounced?');
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});
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it('test debounced functions.', function() {
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var fn = tricks.debounce(spy, 50);
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fn();
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expect(window.setTimeout).toHaveBeenCalledWith(jasmine.any(Function), 50);
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window.setTimeout.calls.argsFor(0)[0]();
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expect(spy).toHaveBeenCalled();
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});
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it('debounced function can accept parameters', function() {
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var fn;
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window.setTimeout.and.callFake(function(func) {
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func();
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});
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fn = tricks.debounce(spy);
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fn('hello world!');
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expect(spy.calls.argsFor(0)).toEqual(['hello world!']);
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});
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});
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describe('throttle', function() {
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var spy;
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function reload(arr) {
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var i = 0,
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bullet;
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function fire() {
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bullet = arr[i];
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i += 1;
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return bullet;
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}
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return fire;
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}
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beforeEach(function() {
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spy = jasmine.createSpy('throttled?');
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});
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it('test throttled functions.', function() {
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var magazine = [1, 3, 6, 8, 9],
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fireGun = reload(magazine),
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fn;
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spyOn(tricks, 'timestamp').and.callFake(function() {
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return fireGun();
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});
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spyOn(tricks, 'debounce').and.returnValue(function() {});
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fn = tricks.throttle(spy, 7);
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fn();
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fn();
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fn();
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fn();
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fn();
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expect(spy.calls.count()).toBe(2);
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expect(tricks.debounce).toHaveBeenCalled();
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});
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it('debounced method must invoke with additional parameter', function() {
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var magazine = [1, 3, 6, 8, 9],
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fireGun = reload(magazine),
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fn,
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debounced;
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spyOn(tricks, 'timestamp').and.callFake(function() {
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return fireGun();
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});
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debounced = jasmine.createSpy('debounced');
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spyOn(tricks, 'debounce').and.returnValue(debounced);
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fn = tricks.throttle(spy, 7);
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fn('hello');
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fn('hello');
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fn('hello');
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fn('hello');
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fn('hello');
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expect(spy.calls.count()).toBe(2);
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expect(tricks.debounce).toHaveBeenCalled();
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expect(debounced.calls.count()).toBe(4);
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// debounce가 이미 콜백을 apply 처리하고 있는데, Mock을 했기 때문에
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// args 를 그냥 넘겨준다 따라서 TC에서만은 각 debounce의 파라미터가 배열 형태임.
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expect(debounced.calls.allArgs()).toEqual([
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[['hello']],
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[['hello']],
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[['hello']],
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[['hello']]
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]);
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});
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it('reset can remove slugs related with throttling.', function() {
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var magazine = [1, 3, 6, 8, 9],
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fireGun = reload(magazine),
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fn;
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spyOn(tricks, 'timestamp').and.callFake(function() {
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return fireGun();
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});
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fn = tricks.throttle(spy, 7);
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fn();
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expect(spy.calls.count()).toBe(1);
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fn.reset();
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fireGun = reload(magazine);
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fn();
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expect(spy.calls.count()).toBe(2);
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});
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it('throttled functions can accept parameters.', function() {
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var fn = tricks.throttle(spy);
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fn('hello world!');
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expect(spy.calls.argsFor(0)).toEqual(['hello world!']);
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});
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});
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});
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