| // Copyright 2006 The Closure Library Authors. 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. |
| |
| goog.provide('goog.structs.QueueTest'); |
| goog.setTestOnly('goog.structs.QueueTest'); |
| |
| goog.require('goog.structs.Queue'); |
| goog.require('goog.testing.jsunit'); |
| |
| function stringifyQueue(q) { |
| var values = q.getValues(); |
| var s = ''; |
| for (var i = 0; i < values.length; i++) { |
| s += values[i]; |
| } |
| return s; |
| } |
| |
| function createQueue() { |
| var q = new goog.structs.Queue(); |
| q.enqueue('a'); |
| q.enqueue('b'); |
| q.enqueue('c'); |
| q.enqueue('a'); |
| q.dequeue(); |
| q.enqueue('b'); |
| q.enqueue('c'); |
| // q is now: bcabc |
| return q; |
| } |
| |
| function testConstructor() { |
| var q = new goog.structs.Queue(); |
| assertTrue('testConstructor(), queue should be empty initially', q.isEmpty()); |
| assertEquals('testConstructor(), count should be 0', q.getCount(), 0); |
| assertEquals('testConstructor(), head element should be undefined', q.peek(), |
| undefined); |
| } |
| |
| function testCount() { |
| var q = createQueue(); |
| assertEquals('testCount(), count should be 5', q.getCount(), 5); |
| q.enqueue('d'); |
| assertEquals('testCount(), count should be 6', q.getCount(), 6); |
| q.dequeue(); |
| assertEquals('testCount(), count should be 5', q.getCount(), 5); |
| q.clear(); |
| assertEquals('testCount(), count should be 0', q.getCount(), 0); |
| } |
| |
| function testEnqueue() { |
| var q = new goog.structs.Queue(); |
| q.enqueue('a'); |
| assertEquals('testEnqueue(), count should be 1', q.getCount(), 1); |
| q.enqueue('b'); |
| assertEquals('testEnqueue(), count should be 2', q.getCount(), 2); |
| assertEquals('testEnqueue(), head element should be a', q.peek(), 'a'); |
| q.dequeue(); |
| assertEquals('testEnqueue(), count should be 1', q.getCount(), 1); |
| assertEquals('testEnqueue(), head element should be b', q.peek(), 'b'); |
| } |
| |
| function testDequeue() { |
| var q = createQueue(); |
| assertEquals('testDequeue(), should return b', q.dequeue(), 'b'); |
| assertEquals('testDequeue(), should return b', q.dequeue(), 'c'); |
| assertEquals('testDequeue(), should return b', q.dequeue(), 'a'); |
| assertEquals('testDequeue(), should return b', q.dequeue(), 'b'); |
| assertEquals('testDequeue(), should return b', q.dequeue(), 'c'); |
| assertTrue('testDequeue(), queue should be empty', q.isEmpty()); |
| assertEquals('testDequeue(), should return undefined for empty queue', |
| q.dequeue(), undefined); |
| } |
| |
| function testPeek() { |
| var q = createQueue(); |
| assertEquals('testPeek(), should return b', q.peek(), 'b'); |
| assertEquals('testPeek(), dequeue should return peek() result', |
| q.dequeue(), 'b'); |
| assertEquals('testPeek(), should return b', q.peek(), 'c'); |
| q.clear(); |
| assertEquals('testPeek(), should return undefined for empty queue', |
| q.peek(), undefined); |
| } |
| |
| function testClear() { |
| var q = createQueue(); |
| q.clear(); |
| assertTrue('testClear(), queue should be empty', q.isEmpty()); |
| } |
| |
| function testQueue() { |
| var q = createQueue(); |
| assertEquals('testQueue(), contents must be bcabc', |
| stringifyQueue(q), 'bcabc'); |
| } |
| |
| function testRemove() { |
| var q = createQueue(); |
| assertEquals('testRemove(), contents must be bcabc', |
| stringifyQueue(q), 'bcabc'); |
| |
| q.dequeue(); |
| assertEquals('testRemove(), contents must be cabc', |
| stringifyQueue(q), 'cabc'); |
| |
| q.enqueue('a'); |
| assertEquals('testRemove(), contents must be cabca', |
| stringifyQueue(q), 'cabca'); |
| |
| assertTrue('testRemove(), remove should have returned true', q.remove('c')); |
| assertEquals('testRemove(), contents must be abca', |
| stringifyQueue(q), 'abca'); |
| |
| assertTrue('testRemove(), remove should have returned true', q.remove('b')); |
| assertEquals('testRemove(), contents must be aca', stringifyQueue(q), 'aca'); |
| |
| assertFalse('testRemove(), remove should have returned false', q.remove('b')); |
| assertEquals('testRemove(), contents must be aca', stringifyQueue(q), 'aca'); |
| |
| assertTrue('testRemove(), remove should have returned true', q.remove('a')); |
| assertEquals('testRemove(), contents must be ca', stringifyQueue(q), 'ca'); |
| |
| assertTrue('testRemove(), remove should have returned true', q.remove('a')); |
| assertEquals('testRemove(), contents must be c', stringifyQueue(q), 'c'); |
| |
| assertTrue('testRemove(), remove should have returned true', q.remove('c')); |
| assertEquals('testRemove(), contents must be empty', stringifyQueue(q), ''); |
| |
| q.enqueue('a'); |
| q.enqueue('b'); |
| q.enqueue('c'); |
| q.enqueue('a'); |
| q.dequeue(); |
| q.enqueue('b'); |
| q.enqueue('c'); |
| assertEquals('testRemove(), contents must be bcabc', |
| stringifyQueue(q), 'bcabc'); |
| assertTrue('testRemove(), remove should have returned true', q.remove('c')); |
| assertEquals('testRemove(), contents must be babc', |
| stringifyQueue(q), 'babc'); |
| } |
| |
| function testContains() { |
| var q = createQueue(); |
| assertTrue('testContains(), contains should have returned true', |
| q.contains('a')); |
| assertFalse('testContains(), contains should have returned false', |
| q.contains('foobar')); |
| } |