Gallery: Split GalleryDataModel from gallery.js.

ui/file_manager/gallery/js/gallery_data_model_unittest.js

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+var model;
+var fileSystem;
+var item;
+
+function setUp() {
+  var metadataCache = new MockMetadataCache();
+  model = new GalleryDataModel(metadataCache, /* Mock EntryListWatcher */{});
+  fileSystem = new MockFileSystem('volumeId');
+  item = new Gallery.Item(
+      new MockEntry(fileSystem, '/test.jpg'),
+      null,
+      {media: {mimeType: 'image/jpeg'}},
+      metadataCache,
+      /* original */ true);
+}
+
+function testSaveItemOverwrite(callback) {
+  // Mocking the saveToFile method.
+  item.saveToFile = function(
+      volumeManager,
+      fallbackDir,
+      overwrite,
+      canvas,
+      callback) {
+    assertTrue(overwrite);
+    callback(true);
+  };
+  model.push(item);
+  reportPromise(
+      model.saveItem({}, item, document.createElement('canvas'), true).
+          then(function() { assertEquals(1, model.length); }),
+      callback);
+}
+
+function testSaveItemNewFile(callback) {
+  // Mocking the saveToFile method.
+  item.saveToFile = function(
+      volumeManager,
+      fallbackDir,
+      overwrite,
+      canvas,
+      callback) {
+    assertFalse(overwrite);
+    // Gallery item track new file.
+    this.entry_ = new MockEntry(fileSystem, '/test (1).jpg');
+    callback(true);
+  };
+  model.push(item);
+  reportPromise(
+      model.saveItem({}, item, document.createElement('canvas'), false).
+          then(function() { assertEquals(2, model.length); }),
+      callback);
+}