Take out and generalize user prefs overriding from IncognitoUserPrefStore.

chrome/browser/prefs/incognito_user_pref_store_unittest.cc

Index: chrome/browser/prefs/incognito_user_pref_store_unittest.cc
diff --git a/chrome/browser/prefs/incognito_user_pref_store_unittest.cc b/chrome/browser/prefs/incognito_user_pref_store_unittest.cc
deleted file mode 100644
index 283ad1726a180f205cf1205bbabc674c1fee7f3b..0000000000000000000000000000000000000000
--- a/chrome/browser/prefs/incognito_user_pref_store_unittest.cc
+++ /dev/null
@@ -1,217 +0,0 @@
-// Copyright (c) 2011 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 "base/values.h"
-#include "chrome/browser/prefs/incognito_user_pref_store.h"
-#include "chrome/browser/prefs/testing_pref_store.h"
-#include "chrome/common/pref_names.h"
-#include "chrome/common/pref_store_observer_mock.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-using ::testing::Mock;
-using ::testing::StrEq;
-
-namespace {
-
-const char* incognito_key = prefs::kBrowserWindowPlacement;
-const char* regular_key = prefs::kShowBookmarkBar;
-
-}  // namespace
-
-class IncognitoUserPrefStoreTest : public testing::Test {
- public:
-  IncognitoUserPrefStoreTest()
-      : underlay_(new TestingPrefStore()),
-        overlay_(new IncognitoUserPrefStore(underlay_.get())) {
-  }
-
-  virtual ~IncognitoUserPrefStoreTest() {}
-
-  scoped_refptr<TestingPrefStore> underlay_;
-  scoped_refptr<IncognitoUserPrefStore> overlay_;
-};
-
-TEST_F(IncognitoUserPrefStoreTest, Observer) {
-  PrefStoreObserverMock obs;
-  overlay_->AddObserver(&obs);
-
-  // Check that underlay first value is reported.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(incognito_key))).Times(1);
-  underlay_->SetValue(incognito_key, Value::CreateIntegerValue(42));
-  Mock::VerifyAndClearExpectations(&obs);
-
-  // Check that underlay overwriting is reported.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(incognito_key))).Times(1);
-  underlay_->SetValue(incognito_key, Value::CreateIntegerValue(43));
-  Mock::VerifyAndClearExpectations(&obs);
-
-  // Check that overwriting change in overlay is reported.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(incognito_key))).Times(1);
-  overlay_->SetValue(incognito_key, Value::CreateIntegerValue(44));
-  Mock::VerifyAndClearExpectations(&obs);
-
-  // Check that hidden underlay change is not reported.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(incognito_key))).Times(0);
-  underlay_->SetValue(incognito_key, Value::CreateIntegerValue(45));
-  Mock::VerifyAndClearExpectations(&obs);
-
-  // Check that overlay remove is reported.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(incognito_key))).Times(1);
-  overlay_->RemoveValue(incognito_key);
-  Mock::VerifyAndClearExpectations(&obs);
-
-  // Check that underlay remove is reported.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(incognito_key))).Times(1);
-  underlay_->RemoveValue(incognito_key);
-  Mock::VerifyAndClearExpectations(&obs);
-
-  // Check respecting of silence.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(incognito_key))).Times(0);
-  overlay_->SetValueSilently(incognito_key, Value::CreateIntegerValue(46));
-  Mock::VerifyAndClearExpectations(&obs);
-
-  overlay_->RemoveObserver(&obs);
-
-  // Check successful unsubscription.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(incognito_key))).Times(0);
-  underlay_->SetValue(incognito_key, Value::CreateIntegerValue(47));
-  overlay_->SetValue(incognito_key, Value::CreateIntegerValue(48));
-  Mock::VerifyAndClearExpectations(&obs);
-}
-
-TEST_F(IncognitoUserPrefStoreTest, GetAndSet) {
-  const Value* value = NULL;
-  int i = -1;
-  EXPECT_EQ(PrefStore::READ_NO_VALUE,
-            overlay_->GetValue(incognito_key, &value));
-  EXPECT_EQ(PrefStore::READ_NO_VALUE,
-            underlay_->GetValue(incognito_key, &value));
-
-  underlay_->SetValue(incognito_key, Value::CreateIntegerValue(42));
-
-  // Value shines through:
-  EXPECT_EQ(PrefStore::READ_OK, overlay_->GetValue(incognito_key, &value));
-  ASSERT_TRUE(value);
-  EXPECT_TRUE(value->GetAsInteger(&i));
-  EXPECT_EQ(42, i);
-
-  EXPECT_EQ(PrefStore::READ_OK, underlay_->GetValue(incognito_key, &value));
-  ASSERT_TRUE(value);
-  EXPECT_TRUE(value->GetAsInteger(&i));
-  EXPECT_EQ(42, i);
-
-  overlay_->SetValue(incognito_key, Value::CreateIntegerValue(43));
-
-  EXPECT_EQ(PrefStore::READ_OK, overlay_->GetValue(incognito_key, &value));
-  ASSERT_TRUE(value);
-  EXPECT_TRUE(value->GetAsInteger(&i));
-  EXPECT_EQ(43, i);
-
-  EXPECT_EQ(PrefStore::READ_OK, underlay_->GetValue(incognito_key, &value));
-  ASSERT_TRUE(value);
-  EXPECT_TRUE(value->GetAsInteger(&i));
-  EXPECT_EQ(42, i);
-
-  overlay_->RemoveValue(incognito_key);
-
-  // Value shines through:
-  EXPECT_EQ(PrefStore::READ_OK, overlay_->GetValue(incognito_key, &value));
-  ASSERT_TRUE(value);
-  EXPECT_TRUE(value->GetAsInteger(&i));
-  EXPECT_EQ(42, i);
-
-  EXPECT_EQ(PrefStore::READ_OK, underlay_->GetValue(incognito_key, &value));
-  ASSERT_TRUE(value);
-  EXPECT_TRUE(value->GetAsInteger(&i));
-  EXPECT_EQ(42, i);
-}
-
-// Check that GetMutableValue does not return the dictionary of the underlay.
-TEST_F(IncognitoUserPrefStoreTest, ModifyDictionaries) {
-  underlay_->SetValue(incognito_key, new DictionaryValue);
-
-  Value* modify = NULL;
-  EXPECT_EQ(PrefStore::READ_OK,
-            overlay_->GetMutableValue(incognito_key, &modify));
-  ASSERT_TRUE(modify);
-  ASSERT_TRUE(modify->GetType() == Value::TYPE_DICTIONARY);
-  static_cast<DictionaryValue*>(modify)->SetInteger(incognito_key, 42);
-
-  Value* original_in_underlay = NULL;
-  EXPECT_EQ(PrefStore::READ_OK,
-            underlay_->GetMutableValue(incognito_key, &original_in_underlay));
-  ASSERT_TRUE(original_in_underlay);
-  ASSERT_TRUE(original_in_underlay->GetType() == Value::TYPE_DICTIONARY);
-  EXPECT_TRUE(static_cast<DictionaryValue*>(original_in_underlay)->empty());
-
-  Value* modified = NULL;
-  EXPECT_EQ(PrefStore::READ_OK,
-            overlay_->GetMutableValue(incognito_key, &modified));
-  ASSERT_TRUE(modified);
-  ASSERT_TRUE(modified->GetType() == Value::TYPE_DICTIONARY);
-  EXPECT_TRUE(Value::Equals(modify, static_cast<DictionaryValue*>(modified)));
-}
-
-// Here we consider a global preference that is not incognito specific.
-TEST_F(IncognitoUserPrefStoreTest, GlobalPref) {
-  PrefStoreObserverMock obs;
-  overlay_->AddObserver(&obs);
-
-  const Value* value = NULL;
-  int i = -1;
-
-  // Check that underlay first value is reported.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(regular_key))).Times(1);
-  underlay_->SetValue(regular_key, Value::CreateIntegerValue(42));
-  Mock::VerifyAndClearExpectations(&obs);
-
-  // Check that underlay overwriting is reported.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(regular_key))).Times(1);
-  underlay_->SetValue(regular_key, Value::CreateIntegerValue(43));
-  Mock::VerifyAndClearExpectations(&obs);
-
-  // Check that we get this value from the overlay
-  EXPECT_EQ(PrefStore::READ_OK, overlay_->GetValue(regular_key, &value));
-  ASSERT_TRUE(value);
-  EXPECT_TRUE(value->GetAsInteger(&i));
-  EXPECT_EQ(43, i);
-
-  // Check that overwriting change in overlay is reported.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(regular_key))).Times(1);
-  overlay_->SetValue(regular_key, Value::CreateIntegerValue(44));
-  Mock::VerifyAndClearExpectations(&obs);
-
-  // Check that we get this value from the overlay and the underlay.
-  EXPECT_EQ(PrefStore::READ_OK, overlay_->GetValue(regular_key, &value));
-  ASSERT_TRUE(value);
-  EXPECT_TRUE(value->GetAsInteger(&i));
-  EXPECT_EQ(44, i);
-  EXPECT_EQ(PrefStore::READ_OK, underlay_->GetValue(regular_key, &value));
-  ASSERT_TRUE(value);
-  EXPECT_TRUE(value->GetAsInteger(&i));
-  EXPECT_EQ(44, i);
-
-  // Check that overlay remove is reported.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(regular_key))).Times(1);
-  overlay_->RemoveValue(regular_key);
-  Mock::VerifyAndClearExpectations(&obs);
-
-  // Check that value was removed from overlay and underlay
-  EXPECT_EQ(PrefStore::READ_NO_VALUE, overlay_->GetValue(regular_key, &value));
-  EXPECT_EQ(PrefStore::READ_NO_VALUE, underlay_->GetValue(regular_key, &value));
-
-  // Check respecting of silence.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(regular_key))).Times(0);
-  overlay_->SetValueSilently(regular_key, Value::CreateIntegerValue(46));
-  Mock::VerifyAndClearExpectations(&obs);
-
-  overlay_->RemoveObserver(&obs);
-
-  // Check successful unsubscription.
-  EXPECT_CALL(obs, OnPrefValueChanged(StrEq(regular_key))).Times(0);
-  underlay_->SetValue(regular_key, Value::CreateIntegerValue(47));
-  overlay_->SetValue(regular_key, Value::CreateIntegerValue(48));
-  Mock::VerifyAndClearExpectations(&obs);
-}