Files.app: Add FileSystemMetadataProvider.

ui/file_manager/file_manager/foreground/js/metadata/file_system_metadata_provider_unittest.js

Index: ui/file_manager/file_manager/foreground/js/metadata/file_system_metadata_provider_unittest.js
diff --git a/ui/file_manager/file_manager/foreground/js/metadata/file_system_metadata_provider_unittest.js b/ui/file_manager/file_manager/foreground/js/metadata/file_system_metadata_provider_unittest.js
new file mode 100644
index 0000000000000000000000000000000000000000..b8204e15d2b24bf05b3fb8ee24cd245646e07634
--- /dev/null
+++ b/ui/file_manager/file_manager/foreground/js/metadata/file_system_metadata_provider_unittest.js
@@ -0,0 +1,38 @@
+// 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"; },
+  getMetadata: function(fulfill, reject) {
+    Promise.resolve({modificationTime: new Date(2015, 1, 1), size: 1024}).then(
+        fulfill, reject);
+  }
+};
+
+var entryB = {
+  toURL: function() { return "filesystem://B"; },
+  getMetadata: function(fulfill, reject) {
+    Promise.resolve({modificationTime: new Date(2015, 2, 2), size: 2048}).then(
+        fulfill, reject);
+  }
+};
+
+function testFileSystemMetadataProviderBasic(callback) {
+  var cache = new MetadataProviderCache();
+  var provider = new FileSystemMetadataProvider(cache);
+  reportPromise(provider.get(
+      [entryA, entryB],
+      ['modificationTime', 'size']).then(
+          function(results) {
+            assertEquals(2, results.length);
+            assertEquals(
+                new Date(2015, 1, 1).toString(),
+                results[0].modificationTime.toString());
+            assertEquals(1024, results[0].size);
+            assertEquals(
+                new Date(2015, 2, 2).toString(),
+                results[1].modificationTime.toString());
+            assertEquals(2048, results[1].size);
+          }), callback);
+}