Fix MediaStorageUtil::CrackDeviceId function to include ":" in the media device type prefix.

chrome/browser/media_gallery/media_storage_util_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 "chrome/browser/media_gallery/media_storage_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chrome {
+
+namespace {
+
+// Sample mtp device id and unique id.
+const char kMtpDeviceId[] = "mtp:VendorModelSerial:ABC:1233:1237912873";
+const char kUniqueId[] = "VendorModelSerial:ABC:1233:1237912873";
+
+}  // namespace
+
+typedef testing::Test MediaStorageUtilTest;
+
+// Test to verify |MediaStorageUtil::MakeDeviceId| functionality using a sample
+// mtp device unique id.
+TEST_F(MediaStorageUtilTest, MakeMtpDeviceId) {
+  std::string device_id =
+      MediaStorageUtil::MakeDeviceId(MediaStorageUtil::USB_MTP, kUniqueId);
+  ASSERT_EQ(kMtpDeviceId, device_id);
+}
+
+// Test to verify |MediaStorageUtil::CrackDeviceId| functionality using a sample
+// mtp device id.
+TEST_F(MediaStorageUtilTest, CrackMtpDeviceId) {
+  MediaStorageUtil::Type type;
+  std::string id;
+  ASSERT_TRUE(MediaStorageUtil::CrackDeviceId(kMtpDeviceId, &type, &id));
+  ASSERT_EQ(kUniqueId, id);
+  ASSERT_EQ(MediaStorageUtil::USB_MTP, type);
+}
+
+}  // namespace chrome