Introduce AudioIPCFactory.

content/renderer/media/audio_ipc_factory_unittest.cc

Index: content/renderer/media/audio_ipc_factory_unittest.cc
diff --git a/content/renderer/media/audio_ipc_factory_unittest.cc b/content/renderer/media/audio_ipc_factory_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..166e8409483f7079e19005313a7ea7250c7e90cc
--- /dev/null
+++ b/content/renderer/media/audio_ipc_factory_unittest.cc
@@ -0,0 +1,223 @@
+// 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 "content/renderer/media/audio_ipc_factory.h"
+
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/message_loop/message_loop.h"
+#include "base/threading/thread.h"
+#include "content/renderer/media/audio_message_filter.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
+#include "mojo/public/cpp/system/message_pipe.h"
+#include "services/service_manager/public/cpp/interface_provider.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using ::testing::_;
+
+namespace content {
+
+namespace {
+
+const int kRenderFrameId = 0;
+
+std::unique_ptr<base::Thread> MakeIOThread() {
+  auto io_thread = base::MakeUnique<base::Thread>("test IO thread");
+  base::Thread::Options thread_options(base::MessageLoop::TYPE_IO, 0);
+  CHECK(io_thread->StartWithOptions(thread_options));
+  return io_thread;
+}
+
+class FakeRemoteFactory : public mojom::RendererAudioOutputStreamFactory {
+ public:
+  FakeRemoteFactory() : binding_(this) {}
+  ~FakeRemoteFactory() override {}
+
+  void RequestDeviceAuthorization(
+      media::mojom::AudioOutputStreamProviderRequest stream_provider,
+      int64_t session_id,
+      const std::string& device_id,
+      RequestDeviceAuthorizationCallback callback) override {
+    std::move(callback).Run(
+        media::OutputDeviceStatus::OUTPUT_DEVICE_STATUS_ERROR_NOT_AUTHORIZED,
+        media::AudioParameters::UnavailableDeviceParams(), std::string());
+    EXPECT_FALSE(on_called_.is_null());
+    std::move(on_called_).Run();
+  }
+
+  void SetOnCalledCallback(base::OnceClosure on_called) {
+    on_called_ = std::move(on_called);
+  }
+
+  void Bind(mojo::ScopedMessagePipeHandle handle) {
+    EXPECT_FALSE(binding_.is_bound());
+    binding_.Bind(
+        mojo::InterfaceRequest<mojom::RendererAudioOutputStreamFactory>(
+            std::move(handle)));
+  }
+
+ private:
+  mojo::Binding<mojom::RendererAudioOutputStreamFactory> binding_;
+  base::OnceClosure on_called_;
+};
+
+class FakeAudioIPCDelegate : public media::AudioOutputIPCDelegate {
+  void OnError() override {}
+  void OnDeviceAuthorized(media::OutputDeviceStatus device_status,
+                          const media::AudioParameters& output_params,
+                          const std::string& matched_device_id) override {}
+  void OnStreamCreated(base::SharedMemoryHandle handle,
+                       base::SyncSocket::Handle socket_handle,
+                       int length) override {}
+  void OnIPCClosed() override {}
+};
+
+}  // namespace
+
+class AudioIPCFactoryTest : public testing::Test {
+ public:
+  AudioIPCFactoryTest() {}
+  ~AudioIPCFactoryTest() override {}
+
+  void RequestAuthorizationOnIOThread(
+      std::unique_ptr<media::AudioOutputIPC> output_ipc) {
+    output_ipc->RequestDeviceAuthorization(&fake_delegate, 0, "",
+                                           url::Origin());
+
+    output_ipc->CloseStream();
+  }
+
+ private:
+  FakeAudioIPCDelegate fake_delegate;
+};
+
+TEST_F(AudioIPCFactoryTest, CallFactoryFromIOThread) {
+  // This test makes sure that AudioIPCFactory correctly binds the
+  // RendererAudioOutputStreamFactoryPtr to the IO thread.
+  base::MessageLoop message_loop;
+  base::RunLoop run_loop;
+  auto io_thread = MakeIOThread();
+
+  FakeRemoteFactory remote_factory;
+  remote_factory.SetOnCalledCallback(run_loop.QuitWhenIdleClosure());
+
+  service_manager::InterfaceProvider interface_provider;
+  service_manager::InterfaceProvider::TestApi(&interface_provider)
+      .SetBinderForName(mojom::RendererAudioOutputStreamFactory::Name_,
+                        base::BindRepeating(&FakeRemoteFactory::Bind,
+                                            base::Unretained(&remote_factory)));
+
+  AudioIPCFactory ipc_factory(nullptr, io_thread->task_runner());
+
+  ipc_factory.MaybeRegisterRemoteFactory(kRenderFrameId, &interface_provider);
+
+  // To make sure that the pointer stored in |ipc_factory| is connected to
+  // |remote_factory|, and also that it's bound to |io_thread|, we create an
+  // AudioOutputIPC object and request device authorization on the IO thread.
+  // This is supposed to call |remote_factory| on the main thread.
+  io_thread->task_runner()->PostTask(
+      FROM_HERE,
+      base::BindOnce(&AudioIPCFactoryTest::RequestAuthorizationOnIOThread,
+                     base::Unretained(this),
+                     ipc_factory.CreateAudioOutputIPC(kRenderFrameId)));
+
+  // Wait for call to |remote_factory|:
+  run_loop.Run();
+
+  ipc_factory.MaybeDeregisterRemoteFactory(0);
+
+  io_thread.reset();
+  base::RunLoop().RunUntilIdle();
+}
+
+TEST_F(AudioIPCFactoryTest, SeveralFactories) {
+  // This test simulates having several frames being created and destructed.
+  base::MessageLoop message_loop;
+  auto io_thread = MakeIOThread();
+  const int n_factories = 5;
+
+  std::vector<service_manager::InterfaceProvider> interface_providers(
+      n_factories);
+
+  std::vector<FakeRemoteFactory> remote_factories(n_factories);
+
+  for (size_t i = 0; i < n_factories; i++) {
+    service_manager::InterfaceProvider::TestApi(&interface_providers[i])
+        .SetBinderForName(
+            mojom::RendererAudioOutputStreamFactory::Name_,
+            base::BindRepeating(&FakeRemoteFactory::Bind,
+                                base::Unretained(&remote_factories[i])));
+  }
+
+  base::RunLoop().RunUntilIdle();
+
+  AudioIPCFactory ipc_factory(nullptr, io_thread->task_runner());
+
+  for (size_t i = 0; i < n_factories; i++) {
+    ipc_factory.MaybeRegisterRemoteFactory(kRenderFrameId + i,
+                                           &interface_providers[i]);
+  }
+
+  base::RunLoop run_loop;
+  remote_factories[0].SetOnCalledCallback(run_loop.QuitWhenIdleClosure());
+  io_thread->task_runner()->PostTask(
+      FROM_HERE,
+      base::BindOnce(&AudioIPCFactoryTest::RequestAuthorizationOnIOThread,
+                     base::Unretained(this),
+                     ipc_factory.CreateAudioOutputIPC(kRenderFrameId)));
+  run_loop.Run();
+
+  // Do some operation and make sure the internal state isn't messed up:
+  ipc_factory.MaybeDeregisterRemoteFactory(1);
+
+  base::RunLoop run_loop2;
+  remote_factories[2].SetOnCalledCallback(run_loop2.QuitWhenIdleClosure());
+  io_thread->task_runner()->PostTask(
+      FROM_HERE,
+      base::BindOnce(&AudioIPCFactoryTest::RequestAuthorizationOnIOThread,
+                     base::Unretained(this),
+                     ipc_factory.CreateAudioOutputIPC(kRenderFrameId + 2)));
+  run_loop2.Run();
+
+  for (size_t i = 0; i < n_factories; i++) {
+    if (i == 1)
+      continue;
+    ipc_factory.MaybeDeregisterRemoteFactory(i);
+  }
+
+  io_thread.reset();
+  base::RunLoop().RunUntilIdle();
+}
+
+TEST_F(AudioIPCFactoryTest, RegisterDeregisterBackToBack_Deregisters) {
+  // This test makes sure that calling Register... followed by Deregister...
+  // correctly sequences the registration before the deregistration.
+  base::MessageLoop message_loop;
+  auto io_thread = MakeIOThread();
+
+  FakeRemoteFactory remote_factory;
+
+  service_manager::InterfaceProvider interface_provider;
+  service_manager::InterfaceProvider::TestApi(&interface_provider)
+      .SetBinderForName(mojom::RendererAudioOutputStreamFactory::Name_,
+                        base::BindRepeating(&FakeRemoteFactory::Bind,
+                                            base::Unretained(&remote_factory)));
+
+  AudioIPCFactory ipc_factory(nullptr, io_thread->task_runner());
+
+  ipc_factory.MaybeRegisterRemoteFactory(kRenderFrameId, &interface_provider);
+  ipc_factory.MaybeDeregisterRemoteFactory(kRenderFrameId);
+  // That there is no factory remaining at destruction is DCHECKed in the
+  // AudioIPCFactory destructor.
+
+  base::RunLoop().RunUntilIdle();
+  io_thread.reset();
+  base::RunLoop().RunUntilIdle();
+}
+
+}  // namespace content