135 lines
3.8 KiB
JavaScript
135 lines
3.8 KiB
JavaScript
'use strict';
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/* eslint-env mocha, jasmine */
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describe('EventEmitter', function() {
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require('../../src/common/dom.js').element = require('jquery');
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require('../../src/jquery/plugin.js');
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var EventEmitter = require('../../src/autocomplete/event_emitter.js');
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var _ = require('../../src/common/utils.js');
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var waitsForAndRuns = require('../helpers/waits_for.js');
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beforeEach(function() {
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this.spy = jasmine.createSpy();
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this.target = _.mixin({}, EventEmitter);
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});
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it('methods should be chainable', function() {
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expect(this.target.onSync()).toEqual(this.target);
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expect(this.target.onAsync()).toEqual(this.target);
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expect(this.target.off()).toEqual(this.target);
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expect(this.target.trigger()).toEqual(this.target);
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});
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it('#on should take the context a callback should be called in', function(done) {
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var context = {val: 3};
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var cbContext;
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this.target.onSync('xevent', setCbContext, context).trigger('xevent');
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waitsForAndRuns(assertCbContext, done, 100);
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function setCbContext() {
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cbContext = this;
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}
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function assertCbContext() {
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return cbContext === context;
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}
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});
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it('#onAsync callbacks should be invoked asynchronously', function(done) {
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this.target.onAsync('event', this.spy).trigger('event');
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expect(this.spy.calls.count()).toBe(0);
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waitsForAndRuns(assertCallCount(this.spy, 1), done, 100);
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});
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it('#onSync callbacks should be invoked synchronously', function() {
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this.target.onSync('event', this.spy).trigger('event');
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expect(this.spy.calls.count()).toBe(1);
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});
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it('#off should remove callbacks', function(done) {
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this.target
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.onSync('event1 event2', this.spy)
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.onAsync('event1 event2', this.spy)
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.off('event1 event2')
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.trigger('event1 event2');
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setTimeout(assertCallCount(this.spy, 0, done), 100);
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});
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it('methods should accept multiple event types', function(done) {
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this.target
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.onSync('event1 event2', this.spy)
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.onAsync('event1 event2', this.spy)
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.trigger('event1 event2');
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expect(this.spy.calls.count()).toBe(2);
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setTimeout(assertCallCount(this.spy, 4, done), 100);
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});
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it('the event type should be passed to the callback', function(done) {
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this.target
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.onSync('sync', this.spy)
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.onAsync('async', this.spy)
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.trigger('sync async');
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var that = this;
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waitsForAndRuns(assertArgs(this.spy, 0, ['sync']), function() {
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waitsForAndRuns(assertArgs(that.spy, 1, ['async']), done, 100);
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}, 100);
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});
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it('arbitrary args should be passed to the callback', function(done) {
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this.target
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.onSync('event', this.spy)
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.onAsync('event', this.spy)
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.trigger('event', 1, 2);
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var that = this;
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waitsForAndRuns(assertArgs(this.spy, 0, ['event', 1, 2]), function() {
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waitsForAndRuns(assertArgs(that.spy, 1, ['event', 1, 2]), done, 100);
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}, 100);
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});
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it('callback execution should be cancellable', function(done) {
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var cancelSpy = jasmine.createSpy().and.callFake(cancel);
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this.target
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.onSync('one', cancelSpy)
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.onSync('one', this.spy)
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.onAsync('two', cancelSpy)
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.onAsync('two', this.spy)
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.onSync('three', cancelSpy)
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.onAsync('three', this.spy)
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.trigger('one two three');
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var that = this;
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setTimeout(assertCallCount(cancelSpy, 3, function() {
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setTimeout(assertCallCount(that.spy, 0, done), 100);
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}), 100);
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function cancel() {
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return false;
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}
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});
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function assertCallCount(spy, expected, done) {
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return function() {
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expect(spy.calls.count()).toBe(expected);
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done && done();
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};
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}
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function assertArgs(spy, call, expected) {
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return function() {
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var actual = spy.calls.argsFor(call);
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return expect(actual).toEqual(expected);
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};
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}
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});
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