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// Copyright 2007 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.
/**
* @fileoverview Generic queue for writing unit tests.
*/
goog.provide('goog.testing.TestQueue');
/**
* Generic queue for writing unit tests
* @constructor
*/
goog.testing.TestQueue = function() {
/**
* Events that have accumulated
* @type {Array.<Object>}
* @private
*/
this.events_ = [];
};
/**
* Adds a new event onto the queue.
* @param {Object} event The event to queue.
*/
goog.testing.TestQueue.prototype.enqueue = function(event) {
this.events_.push(event);
};
/**
* Returns whether the queue is empty.
* @return {boolean} Whether the queue is empty.
*/
goog.testing.TestQueue.prototype.isEmpty = function() {
return this.events_.length == 0;
};
/**
* Gets the next event from the queue. Throws an exception if the queue is
* empty.
* @param {string=} opt_comment Comment if the queue is empty.
* @return {Object} The next event from the queue.
*/
goog.testing.TestQueue.prototype.dequeue = function(opt_comment) {
if (this.isEmpty()) {
throw Error('Handler is empty: ' + opt_comment);
}
return this.events_.shift();
};
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