Download driver for components/download.

components/download/content/download_driver_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 "components/download/content/download_driver_impl.h"
+
+#include <memory>
+#include <string>
+
+#include "base/memory/ptr_util.h"
+#include "content/public/test/fake_download_item.h"
+#include "content/public/test/mock_download_manager.h"
+#include "net/http/http_response_headers.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using testing::_;
+using testing::NiceMock;
+using testing::Return;
+
+namespace download {
+
+namespace {
+
+const char kFakeGuid[] = "fake_guid";
+
+// Matcher to compare driver entries. Not all the memeber fields are compared.
+// Currently no comparison in non test code, so no operator== override for
+// driver entry.
+MATCHER_P(DriverEntryEuqual, entry, "") {
+  return entry.guid == arg.guid && entry.state == arg.state &&
+         entry.bytes_downloaded == arg.bytes_downloaded;
+}
+
+}  // namespace
+
+class MockDriverClient : public DownloadDriver::Client {
+ public:
+  MOCK_METHOD1(OnDriverReady, void(bool));
+  MOCK_METHOD1(OnDownloadCreated, void(const DriverEntry&));
+  MOCK_METHOD2(OnDownloadFailed, void(const DriverEntry&, int));
+  MOCK_METHOD2(OnDownloadSucceeded,
+               void(const DriverEntry&, const base::FilePath&));
+  MOCK_METHOD1(OnDownloadUpdated, void(const DriverEntry&));
+};
+
+class DownloadDriverImplTest : public testing::Test {
+ public:
+  DownloadDriverImplTest() = default;
+  ~DownloadDriverImplTest() override = default;
+
+  void SetUp() override {
+    driver_ =
+        base::MakeUnique<DownloadDriverImpl>(&mock_manager_, base::FilePath());
+  }
+
+  // TODO(xingliu): implements test download manager for embedders to test.
+  NiceMock<content::MockDownloadManager> mock_manager_;
+  MockDriverClient mock_client_;
+  std::unique_ptr<DownloadDriverImpl> driver_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DownloadDriverImplTest);
+};
+
+// Ensure the download manager can be initialized after the download driver.
+TEST_F(DownloadDriverImplTest, ManagerLateInitialization) {
+  EXPECT_CALL(mock_manager_, IsManagerInitialized())
+      .Times(1)
+      .WillOnce(Return(false));
+  driver_->Initialize(&mock_client_);
+
+  EXPECT_CALL(mock_client_, OnDriverReady(true));
+  static_cast<content::DownloadManager::Observer*>(driver_.get())
+      ->OnManagerInitialized();
+}
+
+// Ensures download updates from download items are propagated correctly.
+TEST_F(DownloadDriverImplTest, DownloadItemUpdateEvents) {
+  using DownloadState = content::DownloadItem::DownloadState;
+  using DownloadInterruptReason = content::DownloadInterruptReason;
+
+  EXPECT_CALL(mock_manager_, IsManagerInitialized())
+      .Times(1)
+      .WillOnce(Return(true));
+  EXPECT_CALL(mock_client_, OnDriverReady(true)).Times(1);
+  driver_->Initialize(&mock_client_);
+
+  content::FakeDownloadItem fake_item;
+  fake_item.SetState(DownloadState::IN_PROGRESS);
+  fake_item.SetGuid(kFakeGuid);
+  fake_item.SetReceivedBytes(0);
+  fake_item.SetTotalBytes(1024);
+  DriverEntry entry = DownloadDriverImpl::CreateDriverEntry(&fake_item);
+
+  EXPECT_CALL(mock_client_, OnDownloadUpdated(DriverEntryEuqual(entry)))
+      .Times(1)
+      .RetiresOnSaturation();
+  static_cast<content::DownloadItem::Observer*>(driver_.get())
+      ->OnDownloadUpdated(&fake_item);
+
+  // Nothing happens for cancelled state.
+  fake_item.SetState(DownloadState::CANCELLED);
+  static_cast<content::DownloadItem::Observer*>(driver_.get())
+      ->OnDownloadUpdated(&fake_item);
+
+  fake_item.SetReceivedBytes(1024);
+  fake_item.SetState(DownloadState::COMPLETE);
+  entry = DownloadDriverImpl::CreateDriverEntry(&fake_item);
+  EXPECT_CALL(mock_client_, OnDownloadSucceeded(DriverEntryEuqual(entry), _))
+      .Times(1)
+      .RetiresOnSaturation();
+  static_cast<content::DownloadItem::Observer*>(driver_.get())
+      ->OnDownloadUpdated(&fake_item);
+
+  fake_item.SetState(DownloadState::INTERRUPTED);
+  fake_item.SetLastReason(
+      DownloadInterruptReason::DOWNLOAD_INTERRUPT_REASON_SERVER_BAD_CONTENT);
+  entry = DownloadDriverImpl::CreateDriverEntry(&fake_item);
+  int reason = static_cast<int>(
+      DownloadInterruptReason::DOWNLOAD_INTERRUPT_REASON_SERVER_BAD_CONTENT);
+  EXPECT_CALL(mock_client_, OnDownloadFailed(DriverEntryEuqual(entry), reason))
+      .Times(1)
+      .RetiresOnSaturation();
+  static_cast<content::DownloadItem::Observer*>(driver_.get())
+      ->OnDownloadUpdated(&fake_item);
+}
+
+}  // namespace download