148 lines
4.6 KiB
JavaScript
148 lines
4.6 KiB
JavaScript
// Copyright 2011 The Closure Library Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* @fileoverview Mock implementations of the Closure HTML5 FileSystem wrapper
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* classes. These implementations are designed to be usable in any browser, so
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* they use none of the native FileSystem-related objects.
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*
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*/
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goog.provide('goog.testing.fs');
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goog.require('goog.Timer');
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goog.require('goog.array');
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goog.require('goog.async.Deferred');
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goog.require('goog.fs');
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goog.require('goog.testing.fs.Blob');
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goog.require('goog.testing.fs.FileSystem');
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/**
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* Get a filesystem object. Since these are mocks, there's no difference between
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* temporary and persistent filesystems.
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*
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* @param {number} size Ignored.
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* @return {!goog.async.Deferred} The deferred
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* {@link goog.testing.fs.FileSystem}.
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*/
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goog.testing.fs.getTemporary = function(size) {
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var d = new goog.async.Deferred();
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goog.Timer.callOnce(
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goog.bind(d.callback, d, new goog.testing.fs.FileSystem()));
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return d;
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};
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/**
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* Get a filesystem object. Since these are mocks, there's no difference between
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* temporary and persistent filesystems.
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*
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* @param {number} size Ignored.
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* @return {!goog.async.Deferred} The deferred
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* {@link goog.testing.fs.FileSystem}.
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*/
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goog.testing.fs.getPersistent = function(size) {
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return goog.testing.fs.getTemporary(size);
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};
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/**
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* Which object URLs have been granted for fake blobs.
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* @type {!Object.<boolean>}
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* @private
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*/
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goog.testing.fs.objectUrls_ = {};
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/**
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* Create a fake object URL for a given fake blob. This can be used as a real
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* URL, and it can be created and revoked normally.
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*
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* @param {!goog.testing.fs.Blob} blob The blob for which to create the URL.
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* @return {string} The URL.
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*/
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goog.testing.fs.createObjectUrl = function(blob) {
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var url = blob.toDataUrl();
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goog.testing.fs.objectUrls_[url] = true;
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return url;
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};
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/**
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* Remove a URL that was created for a fake blob.
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*
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* @param {string} url The URL to revoke.
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*/
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goog.testing.fs.revokeObjectUrl = function(url) {
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delete goog.testing.fs.objectUrls_[url];
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};
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/**
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* Return whether or not a URL has been granted for the given blob.
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*
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* @param {!goog.testing.fs.Blob} blob The blob to check.
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* @return {boolean} Whether a URL has been granted.
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*/
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goog.testing.fs.isObjectUrlGranted = function(blob) {
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return (blob.toDataUrl()) in goog.testing.fs.objectUrls_;
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};
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/**
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* Concatenates one or more values together and converts them to a fake blob.
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*
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* @param {...(string|!goog.testing.fs.Blob)} var_args The values that will make
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* up the resulting blob.
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* @return {!goog.testing.fs.Blob} The blob.
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*/
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goog.testing.fs.getBlob = function(var_args) {
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return new goog.testing.fs.Blob(goog.array.map(arguments, String).join(''));
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};
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/**
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* Returns the string value of a fake blob.
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*
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* @param {!goog.testing.fs.Blob} blob The blob to convert to a string.
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* @param {string=} opt_encoding Ignored.
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* @return {!goog.async.Deferred} The deferred string value of the blob.
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*/
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goog.testing.fs.blobToString = function(blob, opt_encoding) {
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var d = new goog.async.Deferred();
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goog.Timer.callOnce(goog.bind(d.callback, d, blob.toString()));
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return d;
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};
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/**
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* Installs goog.testing.fs in place of the standard goog.fs. After calling
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* this, code that uses goog.fs should work without issue using goog.testing.fs.
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*
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* @param {!goog.testing.PropertyReplacer} stubs The property replacer for
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* stubbing out the original goog.fs functions.
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*/
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goog.testing.fs.install = function(stubs) {
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// Prevent warnings that goog.fs may get optimized away. It's true this is
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// unsafe in compiled code, but it's only meant for tests.
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var fs = goog.getObjectByName('goog.fs');
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stubs.replace(fs, 'getTemporary', goog.testing.fs.getTemporary);
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stubs.replace(fs, 'getPersistent', goog.testing.fs.getPersistent);
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stubs.replace(fs, 'createObjectUrl', goog.testing.fs.createObjectUrl);
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stubs.replace(fs, 'revokeObjectUrl', goog.testing.fs.revokeObjectUrl);
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stubs.replace(fs, 'getBlob', goog.testing.fs.getBlob);
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stubs.replace(fs, 'blobToString', goog.testing.fs.blobToString);
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};
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