[Media Router] Add MediaSink subtypes

chrome/browser/media/router/discovery/media_sink_internal_unittest.cc

+// Copyright 2017 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 "chrome/browser/media/router/discovery/media_sink_internal.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+namespace media_router {
+
+TEST(MediaSinkInternalTest, TestIsValidSinkId) {
+  EXPECT_FALSE(MediaSinkInternal::IsValidSinkId(""));
+  EXPECT_FALSE(MediaSinkInternal::IsValidSinkId("@#$*&abc"));
+  EXPECT_TRUE(MediaSinkInternal::IsValidSinkId("rjuKv_yxhY4jg7QBIp0kbngLjR6A"));
+}
+
+TEST(MediaSinkInternalTest, TestIsValidIPAddress) {
+  EXPECT_FALSE(MediaSinkInternal::IsValidIPAddress(""));
+  EXPECT_FALSE(MediaSinkInternal::IsValidIPAddress("www.google.com"));
+  EXPECT_FALSE(MediaSinkInternal::IsValidIPAddress("256.256.300.1"));
+  EXPECT_TRUE(MediaSinkInternal::IsValidIPAddress("192.168.1.3"));
+}
+
+}  // namespace media_router