Local NTP: Introduce OneGoogleBarService

chrome/browser/search/one_google_bar/one_google_bar_service_unittest.cc

+// Copyright 2017 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/browser/search/one_google_bar/one_google_bar_service.h"
+
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "base/macros.h"
+#include "base/memory/ptr_util.h"
+#include "base/optional.h"
+#include "chrome/browser/search/one_google_bar/one_google_bar_data.h"
+#include "chrome/browser/search/one_google_bar/one_google_bar_fetcher.h"
+#include "components/signin/core/browser/account_tracker_service.h"
+#include "components/signin/core/browser/fake_profile_oauth2_token_service.h"
+#include "components/signin/core/browser/fake_signin_manager.h"
+#include "components/signin/core/browser/test_signin_client.h"
+#include "components/sync_preferences/testing_pref_service_syncable.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using testing::Eq;
+using testing::StrictMock;
+
+class FakeOneGoogleBarFetcher : public OneGoogleBarFetcher {
+ public:
+  void Fetch(OneGoogleCallback callback) override {
+    callbacks_.push_back(std::move(callback));
+  }
+
+  size_t GetCallbackCount() const { return callbacks_.size(); }
+
+  void RespondToAllCallbacks(const base::Optional<OneGoogleBarData>& data) {
+    for (OneGoogleCallback& callback : callbacks_) {
+      std::move(callback).Run(data);
+    }
+    callbacks_.clear();
+  }
+
+ private:
+  std::vector<OneGoogleCallback> callbacks_;
+};
+
+class MockOneGoogleBarServiceObserver : public OneGoogleBarServiceObserver {
+ public:
+  MOCK_METHOD0(OnOneGoogleBarDataChanged, void());
+};
+
+class OneGoogleBarServiceTest : public testing::Test {
+ public:
+  OneGoogleBarServiceTest()
+      : signin_client_(&pref_service_),
+        signin_manager_(&signin_client_, &account_tracker_) {
+    SigninManagerBase::RegisterProfilePrefs(pref_service_.registry());
+    SigninManagerBase::RegisterPrefs(pref_service_.registry());
+
+    auto fetcher = base::MakeUnique<FakeOneGoogleBarFetcher>();
+    fetcher_ = fetcher.get();
+    service_ = base::MakeUnique<OneGoogleBarService>(&signin_manager_,
+                                                     std::move(fetcher));
+  }
+
+  FakeOneGoogleBarFetcher* fetcher() { return fetcher_; }
+  OneGoogleBarService* service() { return service_.get(); }
+
+ private:
+  sync_preferences::TestingPrefServiceSyncable pref_service_;
+  TestSigninClient signin_client_;
+  AccountTrackerService account_tracker_;
+  FakeSigninManagerBase signin_manager_;
+
+  // Owned by the service.
+  FakeOneGoogleBarFetcher* fetcher_;
+
+  std::unique_ptr<OneGoogleBarService> service_;
+};
+
+TEST_F(OneGoogleBarServiceTest, RefreshesOnRequest) {
+  ASSERT_THAT(service()->one_google_bar_data(), Eq(base::nullopt));
+
+  // Request a refresh. That should arrive at the fetcher.
+  service()->Refresh();
+  EXPECT_THAT(fetcher()->GetCallbackCount(), Eq(1u));
+
+  // Fulfill it.
+  OneGoogleBarData data;
+  data.bar_html = "<div></div>";
+  fetcher()->RespondToAllCallbacks(data);
+  EXPECT_THAT(service()->one_google_bar_data(), Eq(data));
+
+  // Request another refresh.
+  service()->Refresh();
+  EXPECT_THAT(fetcher()->GetCallbackCount(), Eq(1u));
+
+  // For now, the old data should still be there.
+  EXPECT_THAT(service()->one_google_bar_data(), Eq(data));
+
+  // Fulfill the second request.
+  OneGoogleBarData other_data;
+  other_data.bar_html = "<div>Different!</div>";
+  fetcher()->RespondToAllCallbacks(other_data);
+  EXPECT_THAT(service()->one_google_bar_data(), Eq(other_data));
+}
+
+TEST_F(OneGoogleBarServiceTest, NotifiesObserverOnChanges) {
+  ASSERT_THAT(service()->one_google_bar_data(), Eq(base::nullopt));
+
+  StrictMock<MockOneGoogleBarServiceObserver> observer;
+  service()->AddObserver(&observer);
+
+  // Empty result from a fetch doesn't change anything (it's already empty), so
+  // should not result in a notification.
+  service()->Refresh();
+  fetcher()->RespondToAllCallbacks(base::nullopt);
+
+  // Non-empty response should result in a notification.
+  service()->Refresh();
+  OneGoogleBarData data;
+  data.bar_html = "<div></div>";
+  EXPECT_CALL(observer, OnOneGoogleBarDataChanged());
+  fetcher()->RespondToAllCallbacks(data);
+  EXPECT_THAT(service()->one_google_bar_data(), Eq(data));
+
+  // Non-empty but identical response should not result in another notification.
+  service()->Refresh();
+  OneGoogleBarData identical_data = data;
+  fetcher()->RespondToAllCallbacks(identical_data);
+
+  // Different response should result in a notification.
+  service()->Refresh();
+  OneGoogleBarData other_data;
+  data.bar_html = "<div>Different</div>";
+  EXPECT_CALL(observer, OnOneGoogleBarDataChanged());
+  fetcher()->RespondToAllCallbacks(other_data);
+  EXPECT_THAT(service()->one_google_bar_data(), Eq(other_data));
+
+  // Finally, an empty response should result in a notification now.
+  service()->Refresh();
+  EXPECT_CALL(observer, OnOneGoogleBarDataChanged());
+  fetcher()->RespondToAllCallbacks(base::nullopt);
+  EXPECT_THAT(service()->one_google_bar_data(), Eq(base::nullopt));
+
+  service()->RemoveObserver(&observer);
+}
+
+#if !defined(OS_CHROMEOS)
+
+// Like OneGoogleBarServiceTest, but it has a FakeSigninManager (rather than
+// FakeSigninManagerBase), so it can simulate sign-in and sign-out.
+class OneGoogleBarServiceSignInTest : public testing::Test {
+ public:
+  OneGoogleBarServiceSignInTest()
+      : signin_client_(&pref_service_),
+        signin_manager_(&signin_client_,
+                        &token_service_,
+                        &account_tracker_,
+                        nullptr) {
+    SigninManagerBase::RegisterProfilePrefs(pref_service_.registry());
+    SigninManagerBase::RegisterPrefs(pref_service_.registry());
+    AccountTrackerService::RegisterPrefs(pref_service_.registry());
+
+    account_tracker_.Initialize(&signin_client_);
+
+    auto fetcher = base::MakeUnique<FakeOneGoogleBarFetcher>();
+    fetcher_ = fetcher.get();
+    service_ = base::MakeUnique<OneGoogleBarService>(&signin_manager_,
+                                                     std::move(fetcher));
+  }
+
+  void SignIn() { signin_manager_.SignIn("account", "username", "pass"); }
+  void SignOut() { signin_manager_.ForceSignOut(); }
+
+  FakeOneGoogleBarFetcher* fetcher() { return fetcher_; }
+  OneGoogleBarService* service() { return service_.get(); }
+
+ private:
+  sync_preferences::TestingPrefServiceSyncable pref_service_;
+  TestSigninClient signin_client_;
+  FakeProfileOAuth2TokenService token_service_;
+  AccountTrackerService account_tracker_;
+  FakeSigninManager signin_manager_;
+
+  // Owned by the service.
+  FakeOneGoogleBarFetcher* fetcher_;
+
+  std::unique_ptr<OneGoogleBarService> service_;
+};
+
+TEST_F(OneGoogleBarServiceSignInTest, ResetsOnSignIn) {
+  // Load some data.
+  service()->Refresh();
+  OneGoogleBarData data;
+  data.bar_html = "<div></div>";
+  fetcher()->RespondToAllCallbacks(data);
+  ASSERT_THAT(service()->one_google_bar_data(), Eq(data));
+
+  // Sign in. This should clear the cached data.
+  SignIn();
+  EXPECT_THAT(service()->one_google_bar_data(), Eq(base::nullopt));
+}
+
+TEST_F(OneGoogleBarServiceSignInTest, ResetsOnSignOut) {
+  SignIn();
+
+  // Load some data.
+  service()->Refresh();
+  OneGoogleBarData data;
+  data.bar_html = "<div></div>";
+  fetcher()->RespondToAllCallbacks(data);
+  ASSERT_THAT(service()->one_google_bar_data(), Eq(data));
+
+  // Sign out. This should clear the cached data.
+  SignOut();
+  EXPECT_THAT(service()->one_google_bar_data(), Eq(base::nullopt));
+}
+
+#endif  // OS_CHROMEOS