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// Copyright 2020 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 "cast/streaming/rpc_messenger.h"
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "cast/streaming/remoting.pb.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
using testing::_;
using testing::Invoke;
using testing::Return;
namespace openscreen {
namespace cast {
namespace {
class FakeMessenger {
public:
void OnReceivedRpc(std::unique_ptr<RpcMessage> message) {
received_rpc_ = std::move(message);
received_count_++;
}
void OnSentRpc(const std::vector<uint8_t>& message) {
EXPECT_TRUE(sent_rpc_.ParseFromArray(message.data(), message.size()));
sent_count_++;
}
int received_count() const { return received_count_; }
const RpcMessage& received_rpc() const { return *received_rpc_; }
int sent_count() const { return sent_count_; }
const RpcMessage& sent_rpc() const { return sent_rpc_; }
void set_handle(RpcMessenger::Handle handle) { handle_ = handle; }
RpcMessenger::Handle handle() { return handle_; }
private:
std::unique_ptr<RpcMessage> received_rpc_;
int received_count_ = 0;
RpcMessage sent_rpc_;
int sent_count_ = 0;
RpcMessenger::Handle handle_ = -1;
};
} // namespace
class RpcMessengerTest : public testing::Test {
protected:
void SetUp() override {
fake_messenger_ = std::make_unique<FakeMessenger>();
ASSERT_FALSE(fake_messenger_->received_count());
rpc_messenger_ = std::make_unique<RpcMessenger>(
[p = fake_messenger_.get()](std::vector<uint8_t> message) {
p->OnSentRpc(message);
});
const auto handle = rpc_messenger_->GetUniqueHandle();
fake_messenger_->set_handle(handle);
rpc_messenger_->RegisterMessageReceiverCallback(
handle,
[p = fake_messenger_.get()](std::unique_ptr<RpcMessage> message) {
p->OnReceivedRpc(std::move(message));
});
}
void ProcessMessage(const RpcMessage& rpc) {
std::vector<uint8_t> message(rpc.ByteSizeLong());
rpc.SerializeToArray(message.data(), message.size());
rpc_messenger_->ProcessMessageFromRemote(message.data(), message.size());
}
std::unique_ptr<FakeMessenger> fake_messenger_;
std::unique_ptr<RpcMessenger> rpc_messenger_;
};
TEST_F(RpcMessengerTest, TestProcessMessageFromRemoteRegistered) {
RpcMessage rpc;
rpc.set_handle(fake_messenger_->handle());
ProcessMessage(rpc);
ASSERT_EQ(1, fake_messenger_->received_count());
}
TEST_F(RpcMessengerTest, TestProcessMessageFromRemoteUnregistered) {
RpcMessage rpc;
rpc_messenger_->UnregisterMessageReceiverCallback(fake_messenger_->handle());
ProcessMessage(rpc);
ASSERT_EQ(0, fake_messenger_->received_count());
}
TEST_F(RpcMessengerTest, CanSendMultipleMessages) {
for (int i = 0; i < 10; ++i) {
rpc_messenger_->SendMessageToRemote(RpcMessage{});
}
EXPECT_EQ(10, fake_messenger_->sent_count());
}
TEST_F(RpcMessengerTest, SendMessageCallback) {
// Send message for RPC messenger to process.
RpcMessage sent_rpc;
sent_rpc.set_handle(fake_messenger_->handle());
sent_rpc.set_proc(RpcMessage::RPC_R_SETVOLUME);
sent_rpc.set_double_value(2.3);
rpc_messenger_->SendMessageToRemote(sent_rpc);
// Check if received message is identical to the one sent earlier.
ASSERT_EQ(1, fake_messenger_->sent_count());
const RpcMessage& message = fake_messenger_->sent_rpc();
ASSERT_EQ(fake_messenger_->handle(), message.handle());
ASSERT_EQ(RpcMessage::RPC_R_SETVOLUME, message.proc());
ASSERT_EQ(2.3, message.double_value());
}
TEST_F(RpcMessengerTest, ProcessMessageWithRegisteredHandle) {
// Send message for RPC messenger to process.
RpcMessage sent_rpc;
sent_rpc.set_handle(fake_messenger_->handle());
sent_rpc.set_proc(RpcMessage::RPC_DS_INITIALIZE);
sent_rpc.set_integer_value(4004);
ProcessMessage(sent_rpc);
// Checks if received message is identical to the one sent earlier.
ASSERT_EQ(1, fake_messenger_->received_count());
const RpcMessage& received_rpc = fake_messenger_->received_rpc();
ASSERT_EQ(fake_messenger_->handle(), received_rpc.handle());
ASSERT_EQ(RpcMessage::RPC_DS_INITIALIZE, received_rpc.proc());
ASSERT_EQ(4004, received_rpc.integer_value());
}
TEST_F(RpcMessengerTest, ProcessMessageWithUnregisteredHandle) {
// Send message for RPC messenger to process.
RpcMessage sent_rpc;
RpcMessenger::Handle different_handle = fake_messenger_->handle() + 1;
sent_rpc.set_handle(different_handle);
sent_rpc.set_proc(RpcMessage::RPC_R_SETVOLUME);
sent_rpc.set_double_value(4.5);
ProcessMessage(sent_rpc);
// We shouldn't have gotten the message since the handle is different.
ASSERT_EQ(0, fake_messenger_->received_count());
}
TEST_F(RpcMessengerTest, Registration) {
const auto handle = fake_messenger_->handle();
ASSERT_TRUE(rpc_messenger_->IsRegisteredForTesting(handle));
rpc_messenger_->UnregisterMessageReceiverCallback(handle);
ASSERT_FALSE(rpc_messenger_->IsRegisteredForTesting(handle));
}
} // namespace cast
} // namespace openscreen
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