[Chromoting] GetHostAttributes with tests

remoting/host/host_attributes_unittest.cc

+// Copyright 2016 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 "remoting/host/host_attributes.h"
+
+#include <algorithm>
+#include <vector>
+
+#include "base/strings/string_split.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace remoting {
+
+// Ensures there is no DCHECK failure or crash in Register() and Callbacks.
+TEST(HostAttributesTest, Sanity) {
+  std::string result = GetHostAttributes();
+#if defined(NDEBUG)
+  ASSERT_EQ(result.find("Debug-Build"), std::string::npos);
+#else
+  ASSERT_NE(result.find("Debug-Build"), std::string::npos);
+#endif
+}
+
+TEST(HostAttributesTest, NoDuplicateKeys) {
+  std::vector<std::string> results = base::SplitString(GetHostAttributes(),
+                                                       ",",
+                                                       base::KEEP_WHITESPACE,
+                                                       base::SPLIT_WANT_ALL);
+  for (auto it = results.begin(); it != results.end(); it++) {
+    ASSERT_EQ(std::find(it + 1, results.end(), *it), results.end());
+  }
+}
+
+}  // namespace remoting