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// 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 <vector>
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"
#include "base/run_loop.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
namespace {
class FakeMidiManager : public MidiManager {
public:
FakeMidiManager() : start_initialization_is_called_(false) {}
virtual ~FakeMidiManager() {}
// MidiManager implementation.
virtual void StartInitialization() OVERRIDE {
start_initialization_is_called_ = true;
}
virtual void DispatchSendMidiData(MidiManagerClient* client,
uint32 port_index,
const std::vector<uint8>& data,
double timestamp) OVERRIDE {}
// Utility functions for testing.
void CallCompleteInitialization(MidiResult result) {
CompleteInitialization(result);
}
size_t GetClientCount() const {
return clients_size_for_testing();
}
size_t GetPendingClientCount() const {
return pending_clients_size_for_testing();
}
bool start_initialization_is_called_;
private:
DISALLOW_COPY_AND_ASSIGN(FakeMidiManager);
};
class FakeMidiManagerClient : public MidiManagerClient {
public:
explicit FakeMidiManagerClient(int client_id)
: client_id_(client_id),
result_(MIDI_NOT_SUPPORTED),
wait_for_result_(true) {}
virtual ~FakeMidiManagerClient() {}
// MidiManagerClient implementation.
virtual void CompleteStartSession(int client_id, MidiResult result) OVERRIDE {
EXPECT_TRUE(wait_for_result_);
CHECK_EQ(client_id_, client_id);
result_ = result;
wait_for_result_ = false;
}
virtual void ReceiveMidiData(uint32 port_index, const uint8* data,
size_t size, double timestamp) OVERRIDE {}
virtual void AccumulateMidiBytesSent(size_t size) OVERRIDE {}
int client_id() const { return client_id_; }
MidiResult result() const { return result_; }
MidiResult WaitForResult() {
base::RunLoop run_loop;
// CompleteStartSession() is called inside the message loop on the same
// thread. Protection for |wait_for_result_| is not needed.
while (wait_for_result_)
run_loop.RunUntilIdle();
return result();
}
private:
int client_id_;
MidiResult result_;
bool wait_for_result_;
DISALLOW_COPY_AND_ASSIGN(FakeMidiManagerClient);
};
class MidiManagerTest : public ::testing::Test {
public:
MidiManagerTest()
: manager_(new FakeMidiManager),
message_loop_(new base::MessageLoop) {}
virtual ~MidiManagerTest() {}
protected:
void StartTheFirstSession(FakeMidiManagerClient* client) {
EXPECT_FALSE(manager_->start_initialization_is_called_);
EXPECT_EQ(0U, manager_->GetClientCount());
EXPECT_EQ(0U, manager_->GetPendingClientCount());
manager_->StartSession(client, client->client_id());
EXPECT_EQ(0U, manager_->GetClientCount());
EXPECT_EQ(1U, manager_->GetPendingClientCount());
EXPECT_TRUE(manager_->start_initialization_is_called_);
EXPECT_EQ(0U, manager_->GetClientCount());
EXPECT_EQ(1U, manager_->GetPendingClientCount());
EXPECT_TRUE(manager_->start_initialization_is_called_);
}
void StartTheNthSession(FakeMidiManagerClient* client, size_t nth) {
EXPECT_EQ(nth != 1, manager_->start_initialization_is_called_);
EXPECT_EQ(0U, manager_->GetClientCount());
EXPECT_EQ(nth - 1, manager_->GetPendingClientCount());
// StartInitialization() should not be called for the second and later
// sessions.
manager_->start_initialization_is_called_ = false;
manager_->StartSession(client, client->client_id());
EXPECT_EQ(nth == 1, manager_->start_initialization_is_called_);
manager_->start_initialization_is_called_ = true;
}
void EndSession(FakeMidiManagerClient* client, size_t before, size_t after) {
EXPECT_EQ(before, manager_->GetClientCount());
manager_->EndSession(client);
EXPECT_EQ(after, manager_->GetClientCount());
}
void CompleteInitialization(MidiResult result) {
manager_->CallCompleteInitialization(result);
}
void RunLoopUntilIdle() {
base::RunLoop run_loop;
run_loop.RunUntilIdle();
}
protected:
scoped_ptr<FakeMidiManager> manager_;
private:
scoped_ptr<base::MessageLoop> message_loop_;
DISALLOW_COPY_AND_ASSIGN(MidiManagerTest);
};
TEST_F(MidiManagerTest, StartAndEndSession) {
scoped_ptr<FakeMidiManagerClient> client;
client.reset(new FakeMidiManagerClient(0));
StartTheFirstSession(client.get());
CompleteInitialization(MIDI_OK);
EXPECT_EQ(MIDI_OK, client->WaitForResult());
EndSession(client.get(), 1U, 0U);
}
TEST_F(MidiManagerTest, StartAndEndSessionWithError) {
scoped_ptr<FakeMidiManagerClient> client;
client.reset(new FakeMidiManagerClient(1));
StartTheFirstSession(client.get());
CompleteInitialization(MIDI_INITIALIZATION_ERROR);
EXPECT_EQ(MIDI_INITIALIZATION_ERROR, client->WaitForResult());
EndSession(client.get(), 0U, 0U);
}
TEST_F(MidiManagerTest, StartMultipleSessions) {
scoped_ptr<FakeMidiManagerClient> client1;
scoped_ptr<FakeMidiManagerClient> client2;
client1.reset(new FakeMidiManagerClient(0));
client2.reset(new FakeMidiManagerClient(1));
StartTheFirstSession(client1.get());
StartTheNthSession(client2.get(), 2);
CompleteInitialization(MIDI_OK);
EXPECT_EQ(MIDI_OK, client1->WaitForResult());
EXPECT_EQ(MIDI_OK, client2->WaitForResult());
EndSession(client1.get(), 2U, 1U);
EndSession(client2.get(), 1U, 0U);
}
TEST_F(MidiManagerTest, TooManyPendingSessions) {
// Push as many client requests for starting session as possible.
ScopedVector<FakeMidiManagerClient> many_existing_clients;
many_existing_clients.resize(MidiManager::kMaxPendingClientCount);
for (size_t i = 0; i < MidiManager::kMaxPendingClientCount; ++i) {
many_existing_clients[i] = new FakeMidiManagerClient(i);
StartTheNthSession(many_existing_clients[i], i + 1);
}
// Push the last client that should be rejected for too many pending requests.
scoped_ptr<FakeMidiManagerClient> additional_client(
new FakeMidiManagerClient(MidiManager::kMaxPendingClientCount));
manager_->start_initialization_is_called_ = false;
manager_->StartSession(additional_client.get(),
additional_client->client_id());
EXPECT_FALSE(manager_->start_initialization_is_called_);
EXPECT_EQ(MIDI_INITIALIZATION_ERROR, additional_client->result());
// Other clients still should not receive a result.
RunLoopUntilIdle();
for (size_t i = 0; i < many_existing_clients.size(); ++i)
EXPECT_EQ(MIDI_NOT_SUPPORTED, many_existing_clients[i]->result());
// The result MIDI_OK should be distributed to other clients.
CompleteInitialization(MIDI_OK);
for (size_t i = 0; i < many_existing_clients.size(); ++i)
EXPECT_EQ(MIDI_OK, many_existing_clients[i]->WaitForResult());
// Close all successful sessions in FIFO order.
size_t sessions = many_existing_clients.size();
for (size_t i = 0; i < many_existing_clients.size(); ++i, --sessions)
EndSession(many_existing_clients[i], sessions, sessions - 1);
}
TEST_F(MidiManagerTest, CreateMidiManager) {
scoped_ptr<FakeMidiManagerClient> client;
client.reset(new FakeMidiManagerClient(0));
scoped_ptr<MidiManager> manager(MidiManager::Create());
manager->StartSession(client.get(), client->client_id());
MidiResult 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(OS_ANDROID) && !defined(OS_CHROMEOS)
EXPECT_EQ(MIDI_NOT_SUPPORTED, result);
#elif defined(USE_ALSA)
// Temporary until http://crbug.com/371230 is resolved.
EXPECT_TRUE((result == MIDI_OK) || (result == MIDI_INITIALIZATION_ERROR));
#else
EXPECT_EQ(MIDI_OK, result);
#endif
}
} // namespace
} // namespace media
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