Allow the creation of partially spoofed user agents

chrome/common/chrome_content_client_unittest.cc

Index: chrome/common/chrome_content_client_unittest.cc
diff --git a/chrome/common/chrome_content_client_unittest.cc b/chrome/common/chrome_content_client_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..67f4d6eeba48df95c8f0553164daed0bef155803
--- /dev/null
+++ b/chrome/common/chrome_content_client_unittest.cc
@@ -0,0 +1,82 @@
+// 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 "chrome/common/chrome_content_client.h"
+
+#include "base/command_line.h"
+#include "base/string_split.h"
+#include "content/public/common/content_switches.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+void CheckUserAgentStringOrdering(bool mobile_device) {
+  std::vector<std::string> pieces;
+
+  // Check if the pieces of the user agent string come in the correct order.
+  chrome::ChromeContentClient content_client;
+  std::string buffer = content_client.GetUserAgent();
+
+  base::SplitStringUsingSubstr(buffer, "Mozilla/5.0 (", &pieces);
+  ASSERT_EQ(2u, pieces.size());
+  buffer = pieces[1];
+  EXPECT_EQ("", pieces[0]);
+
+  base::SplitStringUsingSubstr(buffer, ") AppleWebKit/", &pieces);
+  ASSERT_EQ(2u, pieces.size());
+  buffer = pieces[1];
+  std::string os_str = pieces[0];
+
+  base::SplitStringUsingSubstr(buffer, " (KHTML, like Gecko) ", &pieces);
+  ASSERT_EQ(2u, pieces.size());
+  buffer = pieces[1];
+  std::string webkit_version_str = pieces[0];
+
+  base::SplitStringUsingSubstr(buffer, " Safari/", &pieces);
+  ASSERT_EQ(2u, pieces.size());
+  std::string product_str = pieces[0];
+  std::string safari_version_str = pieces[1];
+
+  // Not sure what can be done to better check the OS string, since it's highly
+  // platform-dependent.
+  EXPECT_TRUE(os_str.size() > 0);
+
+  // Check that the version numbers match.
+  EXPECT_TRUE(webkit_version_str.size() > 0);
+  EXPECT_TRUE(safari_version_str.size() > 0);
+  EXPECT_EQ(webkit_version_str, safari_version_str);
+
+  EXPECT_EQ(0u, product_str.find("Chrome/"));
+  if (mobile_device) {
+    // "Mobile" gets tacked on to the end for mobile devices, like phones.
+    const std::string kMobileStr = " Mobile";
+    EXPECT_EQ(kMobileStr,
+              product_str.substr(product_str.size() - kMobileStr.size()));
+  }
+}
+
+}  // namespace
+
+
+namespace chrome_common {
+
+TEST(ChromeContentClientTest, Basic) {
+#if !defined(OS_ANDROID)
+  CheckUserAgentStringOrdering(false);
+#else
+  // Do it once for mobile devices and once for other devices.
+  const char* kArguments[] = {"chrome"};
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  command_line->Reset();
+  command_line->Init(1, kArguments);
+  ASSERT_FALSE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  CheckUserAgentStringOrdering(false);
+
+  command_line->AppendSwitch(switches::kUseMobileUserAgent);
+  ASSERT_TRUE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  CheckUserAgentStringOrdering(true);
+#endif
+}
+
+}  // namespace chrome_common