Revert of Move base/prefs to components/prefs

base/prefs/pref_change_registrar_unittest.cc

Index: base/prefs/pref_change_registrar_unittest.cc
diff --git a/base/prefs/pref_change_registrar_unittest.cc b/base/prefs/pref_change_registrar_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..da425cfad287b231215949c68553fef231393dd8
--- /dev/null
+++ b/base/prefs/pref_change_registrar_unittest.cc
@@ -0,0 +1,198 @@
+// 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 "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/prefs/pref_change_registrar.h"
+#include "base/prefs/pref_observer.h"
+#include "base/prefs/pref_registry_simple.h"
+#include "base/prefs/testing_pref_service.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using testing::Mock;
+using testing::Eq;
+
+namespace base {
+namespace {
+
+const char kHomePage[] = "homepage";
+const char kHomePageIsNewTabPage[] = "homepage_is_newtabpage";
+const char kApplicationLocale[] = "intl.app_locale";
+
+// A mock provider that allows us to capture pref observer changes.
+class MockPrefService : public TestingPrefServiceSimple {
+ public:
+  MockPrefService() {}
+  virtual ~MockPrefService() {}
+
+  MOCK_METHOD2(AddPrefObserver, void(const std::string&, PrefObserver*));
+  MOCK_METHOD2(RemovePrefObserver, void(const std::string&, PrefObserver*));
+};
+
+}  // namespace
+
+class PrefChangeRegistrarTest : public testing::Test {
+ public:
+  PrefChangeRegistrarTest() {}
+  ~PrefChangeRegistrarTest() override {}
+
+ protected:
+  void SetUp() override;
+
+  base::Closure observer() const {
+    return base::Bind(&base::DoNothing);
+  }
+
+  MockPrefService* service() const { return service_.get(); }
+
+ private:
+  scoped_ptr<MockPrefService> service_;
+};
+
+void PrefChangeRegistrarTest::SetUp() {
+  service_.reset(new MockPrefService());
+}
+
+TEST_F(PrefChangeRegistrarTest, AddAndRemove) {
+  PrefChangeRegistrar registrar;
+  registrar.Init(service());
+
+  // Test adding.
+  EXPECT_CALL(*service(),
+              AddPrefObserver(Eq(std::string("test.pref.1")), &registrar));
+  EXPECT_CALL(*service(),
+              AddPrefObserver(Eq(std::string("test.pref.2")), &registrar));
+  registrar.Add("test.pref.1", observer());
+  registrar.Add("test.pref.2", observer());
+  EXPECT_FALSE(registrar.IsEmpty());
+
+  // Test removing.
+  Mock::VerifyAndClearExpectations(service());
+  EXPECT_CALL(*service(),
+              RemovePrefObserver(Eq(std::string("test.pref.1")), &registrar));
+  EXPECT_CALL(*service(),
+              RemovePrefObserver(Eq(std::string("test.pref.2")), &registrar));
+  registrar.Remove("test.pref.1");
+  registrar.Remove("test.pref.2");
+  EXPECT_TRUE(registrar.IsEmpty());
+
+  // Explicitly check the expectations now to make sure that the Removes
+  // worked (rather than the registrar destructor doing the work).
+  Mock::VerifyAndClearExpectations(service());
+}
+
+TEST_F(PrefChangeRegistrarTest, AutoRemove) {
+  PrefChangeRegistrar registrar;
+  registrar.Init(service());
+
+  // Setup of auto-remove.
+  EXPECT_CALL(*service(),
+              AddPrefObserver(Eq(std::string("test.pref.1")), &registrar));
+  registrar.Add("test.pref.1", observer());
+  Mock::VerifyAndClearExpectations(service());
+  EXPECT_FALSE(registrar.IsEmpty());
+
+  // Test auto-removing.
+  EXPECT_CALL(*service(),
+              RemovePrefObserver(Eq(std::string("test.pref.1")), &registrar));
+}
+
+TEST_F(PrefChangeRegistrarTest, RemoveAll) {
+  PrefChangeRegistrar registrar;
+  registrar.Init(service());
+
+  EXPECT_CALL(*service(),
+              AddPrefObserver(Eq(std::string("test.pref.1")), &registrar));
+  EXPECT_CALL(*service(),
+              AddPrefObserver(Eq(std::string("test.pref.2")), &registrar));
+  registrar.Add("test.pref.1", observer());
+  registrar.Add("test.pref.2", observer());
+  Mock::VerifyAndClearExpectations(service());
+
+  EXPECT_CALL(*service(),
+              RemovePrefObserver(Eq(std::string("test.pref.1")), &registrar));
+  EXPECT_CALL(*service(),
+              RemovePrefObserver(Eq(std::string("test.pref.2")), &registrar));
+  registrar.RemoveAll();
+  EXPECT_TRUE(registrar.IsEmpty());
+
+  // Explicitly check the expectations now to make sure that the RemoveAll
+  // worked (rather than the registrar destructor doing the work).
+  Mock::VerifyAndClearExpectations(service());
+}
+
+class ObserveSetOfPreferencesTest : public testing::Test {
+ public:
+  virtual void SetUp() {
+    pref_service_.reset(new TestingPrefServiceSimple);
+    PrefRegistrySimple* registry = pref_service_->registry();
+    registry->RegisterStringPref(kHomePage, "http://google.com");
+    registry->RegisterBooleanPref(kHomePageIsNewTabPage, false);
+    registry->RegisterStringPref(kApplicationLocale, std::string());
+  }
+
+  PrefChangeRegistrar* CreatePrefChangeRegistrar() {
+    PrefChangeRegistrar* pref_set = new PrefChangeRegistrar();
+    base::Closure callback = base::Bind(&base::DoNothing);
+    pref_set->Init(pref_service_.get());
+    pref_set->Add(kHomePage, callback);
+    pref_set->Add(kHomePageIsNewTabPage, callback);
+    return pref_set;
+  }
+
+  MOCK_METHOD1(OnPreferenceChanged, void(const std::string&));
+
+  scoped_ptr<TestingPrefServiceSimple> pref_service_;
+};
+
+TEST_F(ObserveSetOfPreferencesTest, IsObserved) {
+  scoped_ptr<PrefChangeRegistrar> pref_set(CreatePrefChangeRegistrar());
+  EXPECT_TRUE(pref_set->IsObserved(kHomePage));
+  EXPECT_TRUE(pref_set->IsObserved(kHomePageIsNewTabPage));
+  EXPECT_FALSE(pref_set->IsObserved(kApplicationLocale));
+}
+
+TEST_F(ObserveSetOfPreferencesTest, IsManaged) {
+  scoped_ptr<PrefChangeRegistrar> pref_set(CreatePrefChangeRegistrar());
+  EXPECT_FALSE(pref_set->IsManaged());
+  pref_service_->SetManagedPref(kHomePage,
+                                new StringValue("http://crbug.com"));
+  EXPECT_TRUE(pref_set->IsManaged());
+  pref_service_->SetManagedPref(kHomePageIsNewTabPage,
+                                new FundamentalValue(true));
+  EXPECT_TRUE(pref_set->IsManaged());
+  pref_service_->RemoveManagedPref(kHomePage);
+  EXPECT_TRUE(pref_set->IsManaged());
+  pref_service_->RemoveManagedPref(kHomePageIsNewTabPage);
+  EXPECT_FALSE(pref_set->IsManaged());
+}
+
+TEST_F(ObserveSetOfPreferencesTest, Observe) {
+  using testing::_;
+  using testing::Mock;
+
+  PrefChangeRegistrar pref_set;
+  PrefChangeRegistrar::NamedChangeCallback callback = base::Bind(
+      &ObserveSetOfPreferencesTest::OnPreferenceChanged,
+      base::Unretained(this));
+  pref_set.Init(pref_service_.get());
+  pref_set.Add(kHomePage, callback);
+  pref_set.Add(kHomePageIsNewTabPage, callback);
+
+  EXPECT_CALL(*this, OnPreferenceChanged(kHomePage));
+  pref_service_->SetUserPref(kHomePage, new StringValue("http://crbug.com"));
+  Mock::VerifyAndClearExpectations(this);
+
+  EXPECT_CALL(*this, OnPreferenceChanged(kHomePageIsNewTabPage));
+  pref_service_->SetUserPref(kHomePageIsNewTabPage,
+                             new FundamentalValue(true));
+  Mock::VerifyAndClearExpectations(this);
+
+  EXPECT_CALL(*this, OnPreferenceChanged(_)).Times(0);
+  pref_service_->SetUserPref(kApplicationLocale, new StringValue("en_US.utf8"));
+  Mock::VerifyAndClearExpectations(this);
+}
+
+}  // namespace base