ui/file_manager/gallery/js/gallery_item_unittest.js

   1 // Copyright 2015 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 /**
   6  * Mock of ImageUtil.
   7  */
   8 var ImageUtil = {
   9   getMetricName: function() {},
  10   metrics: {
  11     recordEnum: function() {},
  12     recordInterval: function() {},
  13     startInterval: function() {}
  14   }
  15 };
  16
  17 /**
  18  * Mock of ImageEncoder. Since some test changes the behavior of ImageEncoder,
  19  * this is initialized in setUp().
  20  */
  21 var ImageEncoder;
  22
  23 /**
  24  * Load time data.
  25  */
  26 loadTimeData.data = {
  27   DRIVE_DIRECTORY_LABEL: '',
  28   DOWNLOADS_DIRECTORY_LABEL: ''
  29 };
  30
  31 function setUp() {
  32   ImageEncoder = {
  33     encodeMetadata: function() {},
  34     getBlob: function() {}
  35   };
  36 }
  37
  38 /**
  39  * Returns a mock of metadata model.
  40  * @private
  41  * @return {!MetadataModel}
  42  */
  43 function getMockMetadataModel() {
  44   return {
  45     get: function(entries, names) {
  46       return Promise.resolve([
  47         {size: 200}
  48       ]);
  49     },
  50     notifyEntriesChanged: function() {
  51     }
  52   };
  53 }
  54
  55 /**
  56  * Tests for GalleryItem#saveToFile.
  57  */
  58 function testSaveToFile(callback) {
  59   var fileSystem = new MockFileSystem('volumeId');
  60   fileSystem.populate(['/test.jpg']);
  61   var entry = fileSystem.entries['/test.jpg'];
  62   entry.createWriter = function(callback) {
  63     callback({
  64       write: function() {
  65         Promise.resolve().then(function() {
  66           this.onwriteend();
  67         }.bind(this));
  68       },
  69       truncate: function() {
  70         this.write();
  71       }
  72     });
  73   };
  74   var entryChanged = false;
  75   var metadataModel = getMockMetadataModel();
  76   metadataModel.notifyEntriesChanged = function() {
  77     entryChanged = true;
  78   };
  79
  80   var item = new Gallery.Item(
  81       entry,
  82       {isReadOnly: false},
  83       {size: 100},
  84       {},
  85       /* original */ true);
  86   assertEquals(100, item.getMetadataItem().size);
  87   assertFalse(entryChanged);
  88   reportPromise(
  89       new Promise(item.saveToFile.bind(
  90           item,
  91           {getLocationInfo: function() { return {}; }},
  92           metadataModel,
  93           /* fallbackDir */ null,
  94           /* overwrite */ true,
  95           document.createElement('canvas'))).then(function() {
  96             assertEquals(200, item.getMetadataItem().size);
  97             assertTrue(entryChanged);
  98           }), callback);
  99 }
 100
 101 /**
 102  * Tests for GalleryItem#saveToFile. In this test case, fileWriter.write fails
 103  * with an error.
 104  */
 105 function testSaveToFileWriteFailCase(callback) {
 106   var fileSystem = new MockFileSystem('volumeId');
 107   fileSystem.populate(['/test.jpg']);
 108   var entry = fileSystem.entries['/test.jpg'];
 109
 110   entry.createWriter = function(callback) {
 111     callback({
 112       write: function() {
 113         Promise.resolve().then(function() {
 114           this.onerror(new Error());
 115         }.bind(this));
 116       },
 117       truncate: function() {
 118         Promise.resolve().then(function() {
 119           this.onwriteend();
 120         }.bind(this));
 121       }
 122     });
 123   };
 124
 125   var item = new Gallery.Item(
 126       entry,
 127       {isReadOnly: false},
 128       {size: 100},
 129       {},
 130       /* original */ true);
 131   reportPromise(
 132       new Promise(item.saveToFile.bind(
 133           item,
 134           {getLocationInfo: function() { return {}; }},
 135           getMockMetadataModel(),
 136           /* fallbackDir */ null,
 137           /* overwrite */ true,
 138           document.createElement('canvas'))).then(function(result) {
 139             assertFalse(result);
 140           }), callback);
 141 }
 142
 143 /**
 144  * Tests for GalleryItem#saveToFile. In this test case, ImageEncoder.getBlob
 145  * fails with an error. This test case confirms that no write operation runs
 146  * when it fails to get a blob of new image.
 147  */
 148 function testSaveToFileGetBlobFailCase(callback) {
 149   ImageEncoder.getBlob = function() {
 150     throw new Error();
 151   };
 152
 153   var fileSystem = new MockFileSystem('volumeId');
 154   fileSystem.populate(['/test.jpg']);
 155   var entry = fileSystem.entries['/test.jpg'];
 156
 157   var writeOperationRun = false;
 158   entry.createWriter = function(callback) {
 159     callback({
 160       write: function() {
 161         Promise.resolve().then(function() {
 162           writeOperationRun = true;
 163           this.onwriteend();
 164         }.bind(this));
 165       },
 166       truncate: function() {
 167         Promise.resolve().then(function() {
 168           writeOperationRun = true;
 169           this.onwriteend();
 170         }.bind(this));
 171       }
 172     });
 173   };
 174
 175   var item = new Gallery.Item(
 176       entry,
 177       {isReadOnly: false},
 178       {size: 100},
 179       {},
 180       /* original */ true);
 181   reportPromise(
 182       new Promise(item.saveToFile.bind(
 183           item,
 184           {getLocationInfo: function() { return {}; }},
 185           getMockMetadataModel(),
 186           /* fallbackDir */ null,
 187           /* overwrite */ true,
 188           document.createElement('canvas'))).then(function(result) {
 189             assertFalse(result);
 190             assertFalse(writeOperationRun);
 191           }), callback);
 192 }