| <!DOCTYPE html> |
| <!-- |
| Copyright 2011 Software Freedom Conservancy. All Rights Reserved. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| --> |
| <html> |
| <head> |
| <title>events_test.html</title> |
| <script src="test_bootstrap.js"></script> |
| <script> |
| goog.require('goog.testing.jsunit'); |
| goog.require('webdriver.EventEmitter'); |
| </script> |
| </head> |
| <body> |
| <script> |
| function testEmittingWhenNothingIsRegistered() { |
| var emitter = new webdriver.EventEmitter(); |
| emitter.emit('foo'); |
| // Ok if no errors are thrown. |
| } |
| |
| function testPassesArgsToListenersOnEmit() { |
| var emitter = new webdriver.EventEmitter(); |
| var now = goog.now(); |
| |
| var messages = []; |
| emitter.addListener('foo', function(arg) { messages.push(arg); }); |
| |
| emitter.emit('foo', now); |
| assertEquals(1, messages.length); |
| assertEquals(now, messages[0]); |
| |
| emitter.emit('foo', now + 15); |
| assertEquals(2, messages.length); |
| assertEquals(now, messages[0]); |
| assertEquals(now + 15, messages[1]); |
| } |
| |
| function testAddingListeners() { |
| var emitter = new webdriver.EventEmitter(); |
| var count = 0; |
| emitter.addListener('foo', function() { count++; }); |
| emitter.addListener('foo', function() { count++; }); |
| emitter.addListener('foo', function() { count++; }); |
| emitter.emit('foo'); |
| assertEquals(3, count); |
| } |
| |
| function testAddingOneShotListeners() { |
| var emitter = new webdriver.EventEmitter(); |
| var count = 0; |
| emitter.once('foo', function() { count++; }); |
| emitter.once('foo', function() { count++; }); |
| emitter.once('foo', function() { count++; }); |
| |
| emitter.emit('foo'); |
| assertEquals(3, count); |
| |
| emitter.emit('foo'); |
| assertEquals(3, count); |
| } |
| |
| function testCanOnlyAddAListenerConfigOnce() { |
| var emitter = new webdriver.EventEmitter(); |
| var count = 0; |
| function onFoo() { count++; } |
| |
| emitter.on('foo', onFoo); |
| emitter.on('foo', onFoo); |
| |
| emitter.emit('foo'); |
| assertEquals(1, count); |
| |
| emitter.emit('foo'); |
| assertEquals(2, count); |
| } |
| |
| function testAddingListenersWithCustomScope() { |
| var obj = { |
| count: 0, |
| inc: function() { |
| this.count++; |
| } |
| }; |
| var emitter = new webdriver.EventEmitter(); |
| emitter.addListener('foo', obj.inc, obj); |
| |
| emitter.emit('foo'); |
| assertEquals(1, obj.count); |
| |
| emitter.emit('foo'); |
| assertEquals(2, obj.count); |
| |
| emitter.once('bar', obj.inc, obj); |
| emitter.emit('bar'); |
| assertEquals(3, obj.count); |
| |
| emitter.emit('bar'); |
| assertEquals(3, obj.count); |
| } |
| |
| function testRemovingListeners() { |
| var emitter = new webdriver.EventEmitter(); |
| var count = 0; |
| emitter.addListener('foo', function() { count++; }); |
| emitter.addListener('foo', function() { count++; }); |
| |
| var toRemove = function() { count++; }; |
| emitter.addListener('foo', toRemove); |
| |
| emitter.emit('foo'); |
| assertEquals(3, count); |
| |
| emitter.removeListener('foo', toRemove); |
| emitter.emit('foo'); |
| assertEquals(5, count); |
| } |
| |
| function testRemovingAllListeners() { |
| var emitter = new webdriver.EventEmitter(); |
| var count = 0; |
| emitter.addListener('foo', function() { count++; }); |
| emitter.addListener('foo', function() { count++; }); |
| emitter.addListener('foo', function() { count++; }); |
| |
| emitter.emit('foo'); |
| assertEquals(3, count); |
| |
| emitter.removeAllListeners('foo'); |
| |
| emitter.emit('foo'); |
| assertEquals(3, count); |
| } |
| |
| function testRemovingAbsolutelyAllListeners() { |
| var emitter = new webdriver.EventEmitter(); |
| var messages = []; |
| emitter.addListener('foo', function() { messages.push('foo'); }); |
| emitter.addListener('bar', function() { messages.push('bar'); }); |
| |
| emitter.emit('foo'); |
| assertArrayEquals(['foo'], messages); |
| |
| emitter.emit('bar'); |
| assertArrayEquals(['foo', 'bar'], messages); |
| |
| emitter.emit('bar'); |
| emitter.emit('foo'); |
| assertArrayEquals(['foo', 'bar', 'bar', 'foo'], messages); |
| |
| emitter.removeAllListeners(); |
| assertArrayEquals(['foo', 'bar', 'bar', 'foo'], messages); |
| } |
| |
| function testListenerThatRemovesItself() { |
| var emitter = new webdriver.EventEmitter(); |
| emitter.on('foo', listener); |
| emitter.emit('foo'); |
| |
| function listener() { |
| emitter.removeListener('foo', listener); |
| } |
| } |
| |
| function testListenerThatRemovesItself_whenThereAreMultipleListeners() { |
| var emitter = new webdriver.EventEmitter(); |
| var messages = []; |
| emitter.on('foo', one); |
| emitter.on('foo', two); |
| emitter.emit('foo'); |
| assertArrayEquals(['one', 'two'], messages); |
| |
| function one() { |
| messages.push('one'); |
| emitter.removeListener('foo', one); |
| } |
| |
| function two() { |
| messages.push('two'); |
| } |
| } |
| |
| function testListenerAddsAnotherForTheSameEventType() { |
| var emitter = new webdriver.EventEmitter(); |
| var messages = []; |
| emitter.on('foo', one); |
| emitter.emit('foo'); |
| assertArrayEquals(['one', 'two'], messages); |
| |
| function one() { |
| messages.push('one'); |
| emitter.on('foo', two); |
| } |
| |
| function two() { |
| messages.push('two'); |
| } |
| } |
| </script> |
| </body> |
| </html> |
