Add initial Controller to DownloadService

components/download/internal/client_set_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/internal/client_set.h"
+
+#include <algorithm>
+
+#include "base/memory/ptr_util.h"
+#include "components/download/internal/test/empty_client.h"
+#include "components/download/public/clients.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace download {
+
+TEST(DownloadServiceClientSetTest, TestGetClient) {
+  auto client = base::MakeUnique<test::EmptyClient>();
+  Client* raw_client = client.get();
+
+  auto client_map = base::MakeUnique<DownloadClientMap>();
+  client_map->insert(std::make_pair(DownloadClient::TEST, std::move(client)));
+  ClientSet clients(std::move(client_map));
+
+  EXPECT_EQ(raw_client, clients.GetClient(DownloadClient::TEST));
+  EXPECT_EQ(nullptr, clients.GetClient(DownloadClient::INVALID));
+}
+
+TEST(DownloadServiceClientSetTest, TestGetRegisteredClients) {
+  auto client = base::MakeUnique<test::EmptyClient>();
+
+  auto client_map = base::MakeUnique<DownloadClientMap>();
+  client_map->insert(std::make_pair(DownloadClient::TEST, std::move(client)));
+  ClientSet clients(std::move(client_map));
+
+  std::set<DownloadClient> expected_set = {DownloadClient::TEST};
+  std::set<DownloadClient> actual_set = clients.GetRegisteredClients();
+
+  EXPECT_EQ(expected_set.size(), actual_set.size());
+  EXPECT_TRUE(
+      std::equal(expected_set.begin(), expected_set.end(), actual_set.begin()));
+}
+
+}  // namespace download