ui/file_manager/image_loader/image_loader_client_unittest.js

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 'use strict';
   6
   7 var chrome = {
   8   metricsPrivate: {
   9     recordPercentage: function() {},
  10     recordValue: function() {}
  11   },
  12   i18n: {
  13     getMessage: function() {}
  14   }
  15 };
  16
  17 /**
  18  * Lets the client to load URL and returns the local cache (not caches in the
  19  * image loader extension) is used or not.
  20  *
  21  * @param {ImageLoaderClient} client
  22  * @param {string} url URL
  23  * @param {Object} options load options.
  24  * @return {Promise<boolean>} True if the local cache is used.
  25  */
  26 function loadAndCheckCacheUsed(client, url, options) {
  27   var cacheUsed = true;
  28
  29   ImageLoaderClient.sendMessage_ = function(message, callback) {
  30     cacheUsed = false;
  31     if (callback)
  32       callback({data: 'ImageData', width: 100, height: 100, status: 'success'});
  33   };
  34
  35   return new Promise(function(fulfill) {
  36     client.load(url, function() {
  37       fulfill(cacheUsed);
  38     }, options);
  39   });
  40 }
  41
  42 function testCache(callback) {
  43   var client = new ImageLoaderClient();
  44   reportPromise(
  45       loadAndCheckCacheUsed(
  46           client, 'http://example.com/image.jpg', {cache: true}).
  47       then(function(cacheUsed) {
  48         assertFalse(cacheUsed);
  49         return loadAndCheckCacheUsed(
  50             client, 'http://example.com/image.jpg', {cache: true});
  51       }).
  52       then(function(cacheUsed) {
  53         assertTrue(cacheUsed);
  54       }),
  55       callback);
  56 }
  57
  58 function testNoCache(callback) {
  59   var client = new ImageLoaderClient();
  60   reportPromise(
  61       loadAndCheckCacheUsed(
  62           client, 'http://example.com/image.jpg', {cache: false}).
  63       then(function(cacheUsed) {
  64         assertFalse(cacheUsed);
  65         return loadAndCheckCacheUsed(
  66             client, 'http://example.com/image.jpg', {cache: false});
  67       }).
  68       then(function(cacheUsed) {
  69         assertFalse(cacheUsed);
  70       }),
  71       callback);
  72 }
  73
  74 function testDataURLCache(callback) {
  75   var client = new ImageLoaderClient();
  76   reportPromise(
  77       loadAndCheckCacheUsed(client, 'data:URI', {cache: true}).
  78       then(function(cacheUsed) {
  79         assertFalse(cacheUsed);
  80         return loadAndCheckCacheUsed(client, 'data:URI', {cache: true});
  81       }).
  82       then(function(cacheUsed) {
  83         assertFalse(cacheUsed);
  84       }),
  85       callback);
  86 }