Intorduce a separate preference for 'proxy server mode'

chrome/browser/prefs/proxy_prefs_unittest.cc

+// Copyright (c) 2010 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 "base/logging.h"
+#include "base/values.h"
+#include "base/version.h"
+#include "chrome/browser/prefs/proxy_prefs.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class ProxyPrefsTest : public testing::Test {
+};
+
+TEST_F(ProxyPrefsTest, IntValuesFixed) {
+  EXPECT_EQ(ProxyPrefs::DISABLED, 0);
+  EXPECT_EQ(ProxyPrefs::AUTO_DETECT, 1);
+  EXPECT_EQ(ProxyPrefs::MANUAL, 2);
+  EXPECT_EQ(ProxyPrefs::SYSTEM, 3);
+  // Update the following as necessary, don't change the previous ones.
+  EXPECT_EQ(ProxyPrefs::NUM_MODES, 4);
+}
+
+TEST_F(ProxyPrefsTest, StringToProxyMode) {
+  ProxyPrefs::ProxyServerMode mode;
+  EXPECT_TRUE(ProxyPrefs::StringToProxyMode("disabled", &mode));
+  EXPECT_EQ(ProxyPrefs::DISABLED, mode);
+  EXPECT_TRUE(ProxyPrefs::StringToProxyMode("system", &mode));
+  EXPECT_EQ(ProxyPrefs::SYSTEM, mode);
+  EXPECT_TRUE(ProxyPrefs::StringToProxyMode("auto_detect", &mode));
+  EXPECT_EQ(ProxyPrefs::AUTO_DETECT, mode);
+  EXPECT_TRUE(ProxyPrefs::StringToProxyMode("manual", &mode));
+  EXPECT_EQ(ProxyPrefs::MANUAL, mode);
+
+  EXPECT_FALSE(ProxyPrefs::StringToProxyMode("monkey", &mode));
+}
+
+TEST_F(ProxyPrefsTest, IntToProxyMode) {
+  ProxyPrefs::ProxyServerMode mode;
+  EXPECT_TRUE(ProxyPrefs::IntToProxyMode(0, &mode));
+  EXPECT_EQ(ProxyPrefs::DISABLED, mode);
+  EXPECT_TRUE(ProxyPrefs::IntToProxyMode(3, &mode));
+  EXPECT_EQ(ProxyPrefs::SYSTEM, mode);
+  EXPECT_TRUE(ProxyPrefs::IntToProxyMode(1, &mode));
+  EXPECT_EQ(ProxyPrefs::AUTO_DETECT, mode);
+  EXPECT_TRUE(ProxyPrefs::IntToProxyMode(2, &mode));
+  EXPECT_EQ(ProxyPrefs::MANUAL, mode);
+
+  EXPECT_FALSE(ProxyPrefs::IntToProxyMode(-1, &mode));
+  EXPECT_FALSE(ProxyPrefs::IntToProxyMode(ProxyPrefs::NUM_MODES, &mode));
+}