Introduce incognito preference settings.

chrome/browser/prefs/pref_service_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 "app/test/data/resource.h"
 #include "base/command_line.h"
 #include "base/scoped_ptr.h"
 #include "base/values.h"
+#include "chrome/browser/extensions/extension_pref_store.h"
 #include "chrome/browser/policy/configuration_policy_pref_store.h"
 #include "chrome/browser/policy/mock_configuration_policy_provider.h"
 #include "chrome/browser/prefs/browser_prefs.h"
 #include "chrome/browser/prefs/command_line_pref_store.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/browser/prefs/pref_observer_mock.h"
 #include "chrome/browser/prefs/pref_service_mock_builder.h"
 #include "chrome/browser/prefs/pref_value_store.h"
 #include "chrome/browser/prefs/testing_pref_store.h"
 #include "chrome/common/chrome_paths.h"
@@ skipping 119 matching lines @@
   // Make sure obs2 still works after removing obs.
   registrar.Remove(pref_name, &obs);
   EXPECT_CALL(obs, Observe(_, _, _)).Times(0);
   obs2.Expect(&prefs, pref_name, &expected_new_pref_value);
   // This should only fire the observer in obs2.
   prefs.SetString(pref_name, new_pref_value);
   Mock::VerifyAndClearExpectations(&obs);
   Mock::VerifyAndClearExpectations(&obs2);
 }
 
+// Make sure that if a preference changes type, so the wrong type is stored in
+// the user pref file, it uses the correct fallback value instead.
+TEST(PrefServiceTest, GetValueChangedType) {
+  const int kTestValue = 10;
+  TestingPrefService prefs;
+  prefs.RegisterIntegerPref(prefs::kStabilityLaunchCount, kTestValue);
+
+  // Check falling back to a recommended value.
+  prefs.SetUserPref(prefs::kStabilityLaunchCount,
+                     Value::CreateStringValue("not an integer"));
+  const PrefService::Preference* pref =
+      prefs.FindPreference(prefs::kStabilityLaunchCount);
+  ASSERT_TRUE(pref);
+  const Value* value = pref->GetValue();
+  ASSERT_TRUE(value);
+  EXPECT_EQ(Value::TYPE_INTEGER, value->GetType());
+  int actual_int_value = -1;
+  EXPECT_TRUE(value->GetAsInteger(&actual_int_value));
+  EXPECT_EQ(kTestValue, actual_int_value);
+}
+
 TEST(PrefServiceTest, ProxyPolicyOverridesCommandLineOptions) {
   CommandLine command_line(CommandLine::NO_PROGRAM);
   command_line.AppendSwitchASCII(switches::kProxyBypassList, "123");
   command_line.AppendSwitchASCII(switches::kProxyPacUrl, "456");
   command_line.AppendSwitchASCII(switches::kProxyServer, "789");
   scoped_ptr<policy::MockConfigurationPolicyProvider> provider(
       new policy::MockConfigurationPolicyProvider());
   Value* mode_value = Value::CreateIntegerValue(
       policy::kPolicyManuallyConfiguredProxyMode);
   provider->AddPolicy(policy::kPolicyProxyServerMode, mode_value);
@@ skipping 136 matching lines @@
   EXPECT_EQ(std::string(), prefs2->GetString(prefs::kProxyServer));
   EXPECT_EQ(std::string(), prefs2->GetString(prefs::kProxyPacUrl));
   EXPECT_EQ(std::string(), prefs2->GetString(prefs::kProxyBypassList));
 }
 
 class PrefServiceSetValueTest : public testing::Test {
  protected:
   static const char kName[];
   static const char kValue[];
 
-  PrefServiceSetValueTest()
-      : null_value_(Value::CreateNullValue()) {}
-
   TestingPrefService prefs_;
-  scoped_ptr<Value> null_value_;
   PrefObserverMock observer_;
 };
 
 const char PrefServiceSetValueTest::kName[] = "name";
 const char PrefServiceSetValueTest::kValue[] = "value";
 
 TEST_F(PrefServiceSetValueTest, SetStringValue) {
   const char default_string[] = "default";
   const StringValue default_value(default_string);
   prefs_.RegisterStringPref(kName, default_string);
@@ skipping 16 matching lines @@
   prefs_.Set(kName, new_value);
   Mock::VerifyAndClearExpectations(&observer_);
 }
 
 TEST_F(PrefServiceSetValueTest, SetDictionaryValue) {
   prefs_.RegisterDictionaryPref(kName);
   PrefChangeRegistrar registrar;
   registrar.Init(&prefs_);
   registrar.Add(kName, &observer_);
 
-  // Dictionary values are special: setting one to NULL is the same as clearing
-  // the user value, allowing the NULL default to take (or keep) control.
   EXPECT_CALL(observer_, Observe(_, _, _)).Times(0);
-  prefs_.Set(kName, *null_value_);
+  prefs_.RemoveUserPref(kName);
   Mock::VerifyAndClearExpectations(&observer_);
 
   DictionaryValue new_value;
   new_value.SetString(kName, kValue);
   observer_.Expect(&prefs_, kName, &new_value);
   prefs_.Set(kName, new_value);
   Mock::VerifyAndClearExpectations(&observer_);
 
   EXPECT_CALL(observer_, Observe(_, _, _)).Times(0);
   prefs_.Set(kName, new_value);
   Mock::VerifyAndClearExpectations(&observer_);
 
-  observer_.Expect(&prefs_, kName, null_value_.get());
-  prefs_.Set(kName, *null_value_);
+  DictionaryValue empty;
+  observer_.Expect(&prefs_, kName, &empty);
+  prefs_.Set(kName, empty);
   Mock::VerifyAndClearExpectations(&observer_);
 }
 
 TEST_F(PrefServiceSetValueTest, SetListValue) {
   prefs_.RegisterListPref(kName);
   PrefChangeRegistrar registrar;
   registrar.Init(&prefs_);
   registrar.Add(kName, &observer_);
 
-  // List values are special: setting one to NULL is the same as clearing the
-  // user value, allowing the NULL default to take (or keep) control.
   EXPECT_CALL(observer_, Observe(_, _, _)).Times(0);
-  prefs_.Set(kName, *null_value_);
+  prefs_.RemoveUserPref(kName);
   Mock::VerifyAndClearExpectations(&observer_);
 
   ListValue new_value;
   new_value.Append(Value::CreateStringValue(kValue));
   observer_.Expect(&prefs_, kName, &new_value);
   prefs_.Set(kName, new_value);
   Mock::VerifyAndClearExpectations(&observer_);
 
   EXPECT_CALL(observer_, Observe(_, _, _)).Times(0);
   prefs_.Set(kName, new_value);
   Mock::VerifyAndClearExpectations(&observer_);
 
-  observer_.Expect(&prefs_, kName, null_value_.get());
-  prefs_.Set(kName, *null_value_);
+  ListValue empty;
+  observer_.Expect(&prefs_, kName, &empty);
+  prefs_.Set(kName, empty);
   Mock::VerifyAndClearExpectations(&observer_);
 }
+
+class PrefServiceIncognitoTest : public PrefServiceSetValueTest {};
+
+TEST_F(PrefServiceIncognitoTest, SetValue) {
+  const char default_string[] = "default";
+  const StringValue default_value(default_string);
+  prefs_.RegisterStringPref(kName, default_string);
+
+  scoped_refptr<PrefStore> incognito_extension_prefs(new ExtensionPrefStore);
+  scoped_ptr<PrefService> overlay_pref_service(
+      prefs_.CreateIncognitoPrefService(incognito_extension_prefs.get()));
+
+  PrefChangeRegistrar registrar;
+  registrar.Init(&prefs_);
+  registrar.Add(kName, &observer_);
+
+  EXPECT_CALL(observer_, Observe(_, _, _)).Times(0);
+  StringValue new_value(kValue);
+  overlay_pref_service->Set(kName, new_value);
+  Mock::VerifyAndClearExpectations(&observer_);
+
+  // Check that the value is only set in the overlay pref service.
+  std::string value;
+  value = prefs_.GetString(kName);
+  EXPECT_EQ(std::string(default_string), value);
+  value = overlay_pref_service->GetString(kName);
+  EXPECT_EQ(std::string(kValue), value);
+}