Added AddDownload communication path and observers

chrome/browser/background_fetch/background_fetch_client_impl_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/background_fetch/background_fetch_client_impl.h"
 
 #include "base/macros.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/background_fetch/background_fetch_client_factory.h"
 #include "chrome/test/base/testing_profile.h"
+#include "components/offline_items_collection/core/offline_content_provider.h"
 #include "components/offline_items_collection/core/offline_item.h"
 #include "content/public/browser/background_fetch_client.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using offline_items_collection::ContentId;
+using offline_items_collection::OfflineContentProvider;
+using offline_items_collection::OfflineItem;
+
 namespace {
 
 const char kRegistrationId[] = "1234:www.example.com:game_data";
 const char kNamespace[] = "BackgroundFetchNamespace";
 
 class FakeBackgroundFetchDelegate
     : public content::BackgroundFetchClient::Delegate {
  public:
   explicit FakeBackgroundFetchDelegate(const std::string& id)
       : expected_id_(id) {}
 
   void CleanupAllTasks() override {}
 
   void CancelDownload(const std::string& registration_id) override {
     ASSERT_EQ(registration_id, expected_id_);
   }
 
   void PauseDownload(const std::string& registration_id) override {
     ASSERT_EQ(registration_id, expected_id_);
   }
 
   void ResumeDownload(const std::string& registration_id) override {
     ASSERT_EQ(registration_id, expected_id_);
   }
 
  private:
   std::string expected_id_;
 };
 
+class FakeBackgroundFetchObserver : public OfflineContentProvider::Observer {
+ public:
+  FakeBackgroundFetchObserver() = default;
+  ~FakeBackgroundFetchObserver() override = default;
+
+  // OfflineContentProvider::Observer implementation.
+  void OnItemsAvailable(OfflineContentProvider* provider) override {
+    provider_ = provider;
+  }
+
+  void OnItemsAdded(
+      const OfflineContentProvider::OfflineItemList& items) override {
+    added_items_ = items;
+  }
+
+  void OnItemRemoved(const ContentId& id) override { removed_item_ = id; }
+
+  void OnItemUpdated(const OfflineItem& item) override { updated_item_ = item; }
+
+  OfflineContentProvider* provider_ = nullptr;
+  OfflineContentProvider::OfflineItemList added_items_;
+  ContentId removed_item_;
+  OfflineItem updated_item_;
+};
+
 }  // namespace
 
 class BackgroundFetchClientTest : public ::testing::Test {
  public:
   BackgroundFetchClientTest() {}
   ~BackgroundFetchClientTest() override {}
 
  protected:
   content::TestBrowserThreadBundle thread_bundle_;
 
   TestingProfile profile_;
 };
 
 TEST_F(BackgroundFetchClientTest, CancelDownloadTest) {
   BackgroundFetchClientImpl* client = static_cast<BackgroundFetchClientImpl*>(
       profile_.GetBackgroundFetchClient());
   FakeBackgroundFetchDelegate delegate(kRegistrationId);
   client->SetDelegate(&delegate);
 
-  offline_items_collection::ContentId id(kNamespace, kRegistrationId);
+  ContentId id(kNamespace, kRegistrationId);
   ASSERT_NO_FATAL_FAILURE(client->CancelDownload(id));
 
   client->SetDelegate(nullptr);
   ASSERT_NO_FATAL_FAILURE(client->CancelDownload(id));
 }
 
 TEST_F(BackgroundFetchClientTest, PauseDownloadTest) {
   BackgroundFetchClientImpl* client = static_cast<BackgroundFetchClientImpl*>(
       profile_.GetBackgroundFetchClient());
   FakeBackgroundFetchDelegate delegate(kRegistrationId);
   client->SetDelegate(&delegate);
 
-  offline_items_collection::ContentId id(kNamespace, kRegistrationId);
+  ContentId id(kNamespace, kRegistrationId);
   ASSERT_NO_FATAL_FAILURE(client->PauseDownload(id));
 
   client->SetDelegate(nullptr);
   ASSERT_NO_FATAL_FAILURE(client->PauseDownload(id));
 }
 
 TEST_F(BackgroundFetchClientTest, ResumeDownloadTest) {
   BackgroundFetchClientImpl* client = static_cast<BackgroundFetchClientImpl*>(
       profile_.GetBackgroundFetchClient());
   FakeBackgroundFetchDelegate delegate(kRegistrationId);
   client->SetDelegate(&delegate);
 
-  offline_items_collection::ContentId id(kNamespace, kRegistrationId);
+  ContentId id(kNamespace, kRegistrationId);
   ASSERT_NO_FATAL_FAILURE(client->ResumeDownload(id));
 
   client->SetDelegate(nullptr);
   ASSERT_NO_FATAL_FAILURE(client->ResumeDownload(id));
 }
+
+TEST_F(BackgroundFetchClientTest, AddObserverImmediateNotificationTest) {
+  BackgroundFetchClientImpl* client = static_cast<BackgroundFetchClientImpl*>(
+      profile_.GetBackgroundFetchClient());
+  FakeBackgroundFetchDelegate delegate(kRegistrationId);
+  client->SetDelegate(&delegate);
+
+  // The delegate is already available, so AddObserver should trigger an
+  // immediate OnItemsAvailable call.
+  FakeBackgroundFetchObserver observer;
+  client->AddObserver(&observer);
+  EXPECT_EQ(client, observer.provider_);
+}
+
+TEST_F(BackgroundFetchClientTest, AddObserverDelayedNotificationTest) {
+  BackgroundFetchClientImpl* client = static_cast<BackgroundFetchClientImpl*>(
+      profile_.GetBackgroundFetchClient());
+
+  // The observer should not get a OnItemsAvailable call since there is no
+  // connected delegate.
+  FakeBackgroundFetchObserver observer;
+  client->AddObserver(&observer);
+  EXPECT_EQ(nullptr, observer.provider_);
+
+  // Adding a delegate should trigger the OnItemsAvailable call.
+  FakeBackgroundFetchDelegate delegate(kRegistrationId);
+  client->SetDelegate(&delegate);
+  EXPECT_EQ(client, observer.provider_);
+}
+
+TEST_F(BackgroundFetchClientTest, AddDownloadTest) {
+  BackgroundFetchClientImpl* client = static_cast<BackgroundFetchClientImpl*>(
+      profile_.GetBackgroundFetchClient());
+  FakeBackgroundFetchDelegate delegate(kRegistrationId);
+  client->SetDelegate(&delegate);
+
+  FakeBackgroundFetchObserver observer;
+  client->AddObserver(&observer);
+
+  client->AddDownload(GURL("http://www.example.com"), kRegistrationId,
+                      "download_title", 1024);
+  ASSERT_EQ(1U, observer.added_items_.size());
+  OfflineItem item = observer.added_items_[0];
+  EXPECT_EQ("download_title", item.title);
+  EXPECT_EQ(1024, item.total_size_bytes);
+  EXPECT_FALSE(item.is_openable);
+  EXPECT_EQ(GURL("http://www.example.com"), item.page_url);
+  EXPECT_FALSE(item.is_off_the_record);
+  EXPECT_TRUE(item.is_transient);
+  EXPECT_EQ(0, item.percent_completed);
+  EXPECT_EQ(offline_items_collection::OfflineItemState::IN_PROGRESS,
+            item.state);
+  EXPECT_TRUE(item.is_resumable);
+  EXPECT_EQ(kRegistrationId, item.id.id);
+  EXPECT_EQ(kNamespace, item.id.name_space);
+}