Files.app: Add FileSystemMetadataModel.

ui/file_manager/file_manager/foreground/js/metadata/file_system_metadata_model_unittest.js

Index: ui/file_manager/file_manager/foreground/js/metadata/file_system_metadata_model_unittest.js
diff --git a/ui/file_manager/file_manager/foreground/js/metadata/file_system_metadata_model_unittest.js b/ui/file_manager/file_manager/foreground/js/metadata/file_system_metadata_model_unittest.js
new file mode 100644
index 0000000000000000000000000000000000000000..8f53d459028f44c9f3fec5d46f50325a9c2dc4d0
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+++ b/ui/file_manager/file_manager/foreground/js/metadata/file_system_metadata_model_unittest.js
@@ -0,0 +1,63 @@
+// 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 entryA = {
+  toURL: function() { return 'filesystem://A'; }
+};
+
+var entryB = {
+  toURL: function() { return 'filesystem://B'; }
+};
+
+function testFileSystemMetadataModelBasic(callback) {
+  var cache = new MetadataProviderCache();
+  var model = new FileSystemMetadataModel(
+      cache,
+      // Mocking FileSystemMetadataProvider.
+      {
+        get: function(urls) {
+          assertEquals(1, urls.length);
+          assertEquals('filesystem://A', urls[0].toURL());
+          return Promise.resolve(
+              [{modificationTime: new Date(2015, 0, 1), size: 1024}]);
+        }
+      },
+      // Mocking ExternalMetadataProvider.
+      {
+        get: function(urls) {
+          assertEquals(1, urls.length);
+          assertEquals('filesystem://B', urls[0].toURL());
+          return Promise.resolve(
+              [{modificationTime: new Date(2015, 1, 2), size: 2048}]);
+        }
+      },
+      // Mocking VolumeManagerWrapper.
+      {
+        getVolumeInfo: function(entry) {
+          if (entry.toURL() === 'filesystem://A') {
+            return {
+              volumeType: VolumeManagerCommon.VolumeType.DOWNLOADS
+            };
+          } else if (entry.toURL() === 'filesystem://B') {
+            return {
+              volumeType: VolumeManagerCommon.VolumeType.DRIVE
+            };
+          }
+          assertNotReached();
+        }
+      });
+  reportPromise(
+      model.get([entryA, entryB], ['size', 'modificationTime']).then(
+          function(results) {
+            assertEquals(2, results.length);
+            assertEquals(
+                new Date(2015, 0, 1).toString(),
+                results[0].modificationTime.toString());
+            assertEquals(1024, results[0].size);
+            assertEquals(
+                new Date(2015, 1, 2).toString(),
+                results[1].modificationTime.toString());
+            assertEquals(2048, results[1].size);
+          }), callback);
+}