Created web::UserAgentType.

ios/web/public/user_agent_unittest.mm

Index: ios/web/public/user_agent_unittest.mm
diff --git a/ios/web/public/user_agent_unittest.mm b/ios/web/public/user_agent_unittest.mm
new file mode 100644
index 0000000000000000000000000000000000000000..04cbc1c27b56fca1cff06bed09311fc1f2544677
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+++ b/ios/web/public/user_agent_unittest.mm
@@ -0,0 +1,33 @@
+// 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.
+
+#import "ios/web/public/user_agent.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace web {
+
+// Tests conversions between UserAgentType values and their descriptions
+TEST(UserAgentTest, UserAgentTypeDescription) {
+  const std::string kMobileDescription("MOBILE");
+  const std::string kDesktopDescription("DESKTOP");
+  const std::string kNoneDescription("NONE");
+  const std::string kInvalidDescription(
+      "not returned by GetUserAgentTypeDescription()");
+  EXPECT_EQ(kMobileDescription,
+            GetUserAgentTypeDescription(UserAgentType::MOBILE));
+  EXPECT_EQ(kDesktopDescription,
+            GetUserAgentTypeDescription(UserAgentType::DESKTOP));
+  EXPECT_EQ(kNoneDescription, GetUserAgentTypeDescription(UserAgentType::NONE));
+  EXPECT_EQ(UserAgentType::MOBILE,
+            GetUserAgentTypeWithDescription(kMobileDescription));
+  EXPECT_EQ(UserAgentType::DESKTOP,
+            GetUserAgentTypeWithDescription(kDesktopDescription));
+  EXPECT_EQ(UserAgentType::NONE,
+            GetUserAgentTypeWithDescription(kNoneDescription));
+  EXPECT_EQ(UserAgentType::NONE,
+            GetUserAgentTypeWithDescription(kInvalidDescription));
+}
+
+}  // namespace web