mash: Allow a subset of D-Bus clients to be created in DBusThreadManager

chromeos/dbus/dbus_thread_manager_unittest.cc

+// Copyright 2016 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 "chromeos/dbus/dbus_thread_manager.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+
+// Tests that a subset of clients can be created.
+TEST(DBusThreadManagerTest, CreateWithPartialClients) {
+  const DBusClientTypeMask clients =
+      DBusClientBundle::CRAS | DBusClientBundle::CROS_DISKS;
+  DBusThreadManager::Initialize(clients);
+  EXPECT_TRUE(DBusThreadManager::IsInitialized());
+
+  DBusThreadManager* manager = DBusThreadManager::Get();
+  ASSERT_TRUE(manager);
+
+  // In tests, clients are fake.
+  EXPECT_TRUE(manager->IsUsingFake(DBusClientBundle::CRAS));
+  EXPECT_TRUE(manager->IsUsingFake(DBusClientBundle::CROS_DISKS));
+
+  // Requested clients were created.
+  EXPECT_TRUE(manager->GetCrasAudioClient());
+  EXPECT_TRUE(manager->GetCrosDisksClient());
+
+  // Non-requested clients were skipped.
+  EXPECT_FALSE(manager->GetSystemClockClient());
+  EXPECT_FALSE(manager->GetUpdateEngineClient());
+
+  DBusThreadManager::Shutdown();
+}
+
+}  // namespace chromeos