Web MIDI: add dynamic MidiManager instantiation support for Linux

media/midi/midi_manager_unittest.cc

 // Copyright 2014 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 "media/midi/midi_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/memory/scoped_vector.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/system_monitor/system_monitor.h"
 #include "build/build_config.h"
+#include "media/midi/midi_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace midi {
 
 namespace {
 
 using mojom::PortState;
 using mojom::Result;
 
 class FakeMidiManager : public MidiManager {
  public:
   FakeMidiManager()
-      : start_initialization_is_called_(false), finalize_is_called_(false) {}
+      : MidiManager(nullptr),
+        start_initialization_is_called_(false),
+        finalize_is_called_(false) {}
   ~FakeMidiManager() override {}
 
   // MidiManager implementation.
   void StartInitialization() override {
     start_initialization_is_called_ = true;
   }
 
   void Finalize() override { finalize_is_called_ = true; }
 
   void DispatchSendMidiData(MidiManagerClient* client,
@@ skipping 60 matching lines @@
   Result result_;
   bool wait_for_result_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeMidiManagerClient);
 };
 
 class MidiManagerTest : public ::testing::Test {
  public:
   MidiManagerTest()
       : manager_(new FakeMidiManager),
+        service_(new MidiService(base::WrapUnique(manager_))),
         message_loop_(new base::MessageLoop) {}
   ~MidiManagerTest() override {
     manager_->Shutdown();
     base::RunLoop run_loop;
     run_loop.RunUntilIdle();
     EXPECT_EQ(manager_->start_initialization_is_called_,
               manager_->finalize_is_called_);
   }
 
  protected:
@@ skipping 32 matching lines @@
   void CompleteInitialization(Result result) {
     manager_->CallCompleteInitialization(result);
   }
 
   void RunLoopUntilIdle() {
     base::RunLoop run_loop;
     run_loop.RunUntilIdle();
   }
 
  protected:
-  std::unique_ptr<FakeMidiManager> manager_;
+  FakeMidiManager* manager_;  // Owned by |service_|.
+  std::unique_ptr<MidiService> service_;
 
  private:
   std::unique_ptr<base::MessageLoop> message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(MidiManagerTest);
 };
 
 TEST_F(MidiManagerTest, StartAndEndSession) {
   std::unique_ptr<FakeMidiManagerClient> client;
   client.reset(new FakeMidiManagerClient);
@@ skipping 85 matching lines @@
   // Following function should not call the destructed |client| function.
   CompleteInitialization(Result::OK);
   base::RunLoop run_loop;
   run_loop.RunUntilIdle();
 }
 
 TEST_F(MidiManagerTest, CreateMidiManager) {
   // SystemMonitor is needed on Windows.
   base::SystemMonitor system_monitor;
 
-  std::unique_ptr<FakeMidiManagerClient> client;
-  client.reset(new FakeMidiManagerClient);
+  std::unique_ptr<FakeMidiManagerClient> client(
+      base::MakeUnique<FakeMidiManagerClient>());
 
-  std::unique_ptr<MidiManager> manager(MidiManager::Create());
-  manager->StartSession(client.get());
+  std::unique_ptr<MidiService> service(base::MakeUnique<MidiService>());
+  service->StartSession(client.get());
 
   Result result = client->WaitForResult();
   // This #ifdef needs to be identical to the one in media/midi/midi_manager.cc.
   // Do not change the condition for disabling this test.
 #if !defined(OS_MACOSX) && !defined(OS_WIN) && \
     !(defined(USE_ALSA) && defined(USE_UDEV)) && !defined(OS_ANDROID)
   EXPECT_EQ(Result::NOT_SUPPORTED, result);
 #elif defined(USE_ALSA)
   // Temporary until http://crbug.com/371230 is resolved.
   EXPECT_TRUE(result == Result::OK || result == Result::INITIALIZATION_ERROR);
 #else
   EXPECT_EQ(Result::OK, result);
 #endif
 
-  manager->Shutdown();
+  service->Shutdown();
   base::RunLoop run_loop;
   run_loop.RunUntilIdle();
 }
 
 // TODO(toyoshim): Add multi-threaded unit tests to check races around
 // StartInitialization(), CompleteInitialization(), and Finalize().
 
 }  // namespace
 
 }  // namespace midi