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// Copyright 2011 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 Provides a JS storage class implementing the HTML5 Storage
* interface.
*/
goog.require('goog.structs.Map');
goog.provide('goog.testing.MockStorage');
/**
* A JS storage instance, implementing the HMTL5 Storage interface.
* See http://www.w3.org/TR/webstorage/ for details.
*
* @constructor
* @implements {Storage}
*/
goog.testing.MockStorage = function() {
/**
* The underlying storage object.
* @type {goog.structs.Map}
* @private
*/
this.store_ = new goog.structs.Map();
/**
* The number of elements in the storage.
* @type {number}
*/
this.length = 0;
};
/**
* Sets an item to the storage.
* @param {string} key Storage key.
* @param {*} value Storage value. Must be convertible to string.
* @override
*/
goog.testing.MockStorage.prototype.setItem = function(key, value) {
this.store_.set(key, String(value));
this.length = this.store_.getCount();
};
/**
* Gets an item from the storage. The item returned is the "structured clone"
* of the value from setItem. In practice this means it's the value cast to a
* string.
* @param {string} key Storage key.
* @return {?string} Storage value for key; null if does not exist.
* @override
*/
goog.testing.MockStorage.prototype.getItem = function(key) {
var val = this.store_.get(key);
// Enforce that getItem returns string values.
return (val != null) ? /** @type {string} */ (val) : null;
};
/**
* Removes and item from the storage.
* @param {string} key Storage key.
* @override
*/
goog.testing.MockStorage.prototype.removeItem = function(key) {
this.store_.remove(key);
this.length = this.store_.getCount();
};
/**
* Clears the storage.
* @override
*/
goog.testing.MockStorage.prototype.clear = function() {
this.store_.clear();
this.length = 0;
};
/**
* Returns the key at the given index.
* @param {number} index The index for the key.
* @return {?string} Key at the given index, null if not found.
* @override
*/
goog.testing.MockStorage.prototype.key = function(index) {
return this.store_.getKeys()[index] || null;
};
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