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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include <string>
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/functional/callback_helpers.h"
#include "base/run_loop.h"
#include "base/synchronization/waitable_event.h"
#include "base/test/task_environment.h"
#include "net/base/net_errors.h"
#include "net/socket/socket.h"
#include "remoting/protocol/fake_stream_socket.h"
#include "remoting/protocol/message_reader.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/webrtc/rtc_base/byte_order.h"
using testing::_;
using testing::DoAll;
using testing::Mock;
using testing::SaveArg;
namespace remoting::protocol {
namespace {
const char kTestMessage1[] = "Message1";
const char kTestMessage2[] = "Message2";
} // namespace
class MockMessageReceivedCallback {
public:
MOCK_METHOD0(OnMessage, void());
};
class MessageReaderTest : public testing::Test {
public:
// Following two methods are used by the ReadFromCallback test.
void AddSecondMessage() { AddMessage(kTestMessage2); }
// Used by the DeleteFromCallback() test.
void DeleteReader() { reader_.reset(); }
protected:
void SetUp() override { reader_ = std::make_unique<MessageReader>(); }
void InitReader() {
reader_->StartReading(&socket_,
base::BindRepeating(&MessageReaderTest::OnMessage,
base::Unretained(this)),
base::BindOnce(&MessageReaderTest::OnReadError,
base::Unretained(this)));
}
void AddMessage(const std::string& message) {
std::string data = std::string(4, ' ') + message;
webrtc::SetBE32(const_cast<char*>(data.data()), message.size());
socket_.AppendInputData(data);
}
bool CompareResult(CompoundBuffer* buffer, const std::string& expected) {
std::string result(buffer->total_bytes(), ' ');
buffer->CopyTo(const_cast<char*>(result.data()), result.size());
return result == expected;
}
void OnReadError(int error) {
read_error_ = error;
reader_.reset();
}
void OnMessage(std::unique_ptr<CompoundBuffer> buffer) {
messages_.push_back(std::move(buffer));
callback_.OnMessage();
}
base::test::SingleThreadTaskEnvironment task_environment_;
std::unique_ptr<MessageReader> reader_;
FakeStreamSocket socket_;
MockMessageReceivedCallback callback_;
int read_error_ = 0;
std::vector<std::unique_ptr<CompoundBuffer>> messages_;
};
// Receive one message.
TEST_F(MessageReaderTest, OneMessage) {
AddMessage(kTestMessage1);
EXPECT_CALL(callback_, OnMessage()).Times(1);
InitReader();
base::RunLoop().RunUntilIdle();
EXPECT_TRUE(socket_.read_pending());
EXPECT_EQ(1U, messages_.size());
}
// Receive two messages in one packet.
TEST_F(MessageReaderTest, TwoMessages_Together) {
AddMessage(kTestMessage1);
AddMessage(kTestMessage2);
EXPECT_CALL(callback_, OnMessage()).Times(2);
InitReader();
base::RunLoop().RunUntilIdle();
Mock::VerifyAndClearExpectations(&callback_);
Mock::VerifyAndClearExpectations(&socket_);
EXPECT_TRUE(CompareResult(messages_[0].get(), kTestMessage1));
EXPECT_TRUE(CompareResult(messages_[1].get(), kTestMessage2));
EXPECT_TRUE(socket_.read_pending());
}
// Receive two messages in separate packets.
TEST_F(MessageReaderTest, TwoMessages_Separately) {
AddMessage(kTestMessage1);
EXPECT_CALL(callback_, OnMessage()).Times(1);
InitReader();
base::RunLoop().RunUntilIdle();
Mock::VerifyAndClearExpectations(&callback_);
Mock::VerifyAndClearExpectations(&socket_);
EXPECT_TRUE(CompareResult(messages_[0].get(), kTestMessage1));
EXPECT_TRUE(socket_.read_pending());
// Write another message and verify that we receive it.
EXPECT_CALL(callback_, OnMessage()).Times(1);
AddMessage(kTestMessage2);
base::RunLoop().RunUntilIdle();
EXPECT_TRUE(CompareResult(messages_[1].get(), kTestMessage2));
EXPECT_TRUE(socket_.read_pending());
}
// Read() returns error.
TEST_F(MessageReaderTest, ReadError) {
socket_.SetReadError(net::ERR_FAILED);
EXPECT_CALL(callback_, OnMessage()).Times(0);
InitReader();
EXPECT_EQ(net::ERR_FAILED, read_error_);
EXPECT_FALSE(reader_);
}
// Read() returns 0 (end of stream).
TEST_F(MessageReaderTest, EndOfStream) {
socket_.SetReadError(0);
EXPECT_CALL(callback_, OnMessage()).Times(0);
InitReader();
EXPECT_EQ(0, read_error_);
EXPECT_FALSE(reader_);
}
// Verify that we the OnMessage callback is not reentered.
TEST_F(MessageReaderTest, ReadFromCallback) {
AddMessage(kTestMessage1);
EXPECT_CALL(callback_, OnMessage())
.Times(2)
.WillOnce(Invoke(this, &MessageReaderTest::AddSecondMessage));
InitReader();
base::RunLoop().RunUntilIdle();
EXPECT_TRUE(socket_.read_pending());
}
// Verify that we stop getting callbacks after deleting MessageReader.
TEST_F(MessageReaderTest, DeleteFromCallback) {
AddMessage(kTestMessage1);
AddMessage(kTestMessage2);
// OnMessage() should never be called for the second message.
EXPECT_CALL(callback_, OnMessage())
.Times(1)
.WillOnce(Invoke(this, &MessageReaderTest::DeleteReader));
InitReader();
base::RunLoop().RunUntilIdle();
}
} // namespace remoting::protocol
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