gdata:: Add GDataFileSystem::GetFile().

chrome/browser/chromeos/gdata/gdata_file_system_unittest.cc

 // Copyright (c) 2012 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.
 #include <string>
 #include <vector>
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/message_loop.h"
@@ skipping 420 matching lines @@
 
   // Existing folder.
   EXPECT_EQ(
       file_system_->FindFirstMissingParentDirectory(
           FilePath("gdata/Directory 1"),
           &last_dir_content_url,
           &first_missing_parent_path),
       GDataFileSystem::DIRECTORY_ALREADY_PRESENT);
 }
 
+// TODO(satorux): Write a test for GetFile() once DocumentsService is
+// mockable.
+
+TEST_F(GDataFileSystemTest, GetGDataFileInfoFromPath) {
+  LoadRootFeedDocument("root_feed.json");
+
+  GDataFileBase* file_info = file_system_->GetGDataFileInfoFromPath(
+      FilePath(FILE_PATH_LITERAL("gdata/File 1.txt")));
+  ASSERT_TRUE(file_info != NULL);
+  EXPECT_EQ("https://file_link_self/", file_info->self_url().spec());
+  EXPECT_EQ("https://file_content_url/", file_info->content_url().spec());
+
+  GDataFileBase* non_existent = file_system_->GetGDataFileInfoFromPath(
+      FilePath(FILE_PATH_LITERAL("gdata/Nonexistent.txt")));
+  ASSERT_TRUE(non_existent == NULL);
+}
+
 }   // namespace gdata