cartographer/cartographer_grpc/framework/server_test.cc

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/*
* Copyright 2017 The Cartographer Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "cartographer_grpc/framework/server.h"
#include "cartographer_grpc/framework/execution_context.h"
#include "cartographer_grpc/framework/proto/math_service.grpc.pb.h"
#include "cartographer_grpc/framework/proto/math_service.pb.h"
#include "cartographer_grpc/framework/rpc_handler.h"
#include "glog/logging.h"
#include "grpc++/grpc++.h"
#include "gtest/gtest.h"
namespace cartographer_grpc {
namespace framework {
namespace {
class MathServerContext : public ExecutionContext {
public:
int additional_increment() { return 10; }
};
class GetSumHandler
: public RpcHandler<Stream<proto::GetSumRequest>, proto::GetSumResponse> {
public:
void OnRequest(const proto::GetSumRequest& request) override {
sum_ += GetContext<MathServerContext>()->additional_increment();
sum_ += request.input();
}
void OnReadsDone() override {
auto response = cartographer::common::make_unique<proto::GetSumResponse>();
response->set_output(sum_);
Send(std::move(response));
}
private:
int sum_ = 0;
};
class GetRunningSumHandler : public RpcHandler<Stream<proto::GetSumRequest>,
Stream<proto::GetSumResponse>> {
public:
void OnRequest(const proto::GetSumRequest& request) override {
sum_ += request.input();
// Respond twice to demonstrate bidirectional streaming.
auto response = cartographer::common::make_unique<proto::GetSumResponse>();
response->set_output(sum_);
Send(std::move(response));
response = cartographer::common::make_unique<proto::GetSumResponse>();
response->set_output(sum_);
Send(std::move(response));
}
void OnReadsDone() override { Finish(::grpc::Status::OK); }
private:
int sum_ = 0;
};
class GetSquareHandler
: public RpcHandler<proto::GetSquareRequest, proto::GetSquareResponse> {
void OnRequest(const proto::GetSquareRequest& request) override {
auto response =
cartographer::common::make_unique<proto::GetSquareResponse>();
response->set_output(request.input() * request.input());
Send(std::move(response));
}
};
// TODO(cschuet): Due to the hard-coded part these tests will become flaky when
// run in parallel. It would be nice to find a way to solve that. gRPC also
// allows to communicate over UNIX domain sockets.
const std::string kServerAddress = "localhost:50051";
const std::size_t kNumThreads = 1;
class ServerTest : public ::testing::Test {
protected:
void SetUp() override {
Server::Builder server_builder;
server_builder.SetServerAddress(kServerAddress);
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server_builder.SetNumGrpcThreads(kNumThreads);
server_builder.SetNumEventThreads(kNumThreads);
server_builder.RegisterHandler<GetSumHandler, proto::Math>("GetSum");
server_builder.RegisterHandler<GetSquareHandler, proto::Math>("GetSquare");
server_builder.RegisterHandler<GetRunningSumHandler, proto::Math>(
"GetRunningSum");
server_ = server_builder.Build();
client_channel_ =
grpc::CreateChannel(kServerAddress, grpc::InsecureChannelCredentials());
stub_ = proto::Math::NewStub(client_channel_);
}
std::unique_ptr<Server> server_;
std::shared_ptr<grpc::Channel> client_channel_;
std::unique_ptr<proto::Math::Stub> stub_;
grpc::ClientContext client_context_;
};
TEST_F(ServerTest, StartAndStopServerTest) {
server_->Start();
server_->Shutdown();
}
TEST_F(ServerTest, ProcessRpcStreamTest) {
server_->SetExecutionContext(
cartographer::common::make_unique<MathServerContext>());
server_->Start();
proto::GetSumResponse result;
std::unique_ptr<grpc::ClientWriter<proto::GetSumRequest>> writer(
stub_->GetSum(&client_context_, &result));
for (int i = 0; i < 3; ++i) {
proto::GetSumRequest request;
request.set_input(i);
EXPECT_TRUE(writer->Write(request));
}
writer->WritesDone();
grpc::Status status = writer->Finish();
EXPECT_TRUE(status.ok());
EXPECT_EQ(result.output(), 33);
server_->Shutdown();
}
TEST_F(ServerTest, ProcessUnaryRpcTest) {
server_->Start();
proto::GetSquareResponse result;
proto::GetSquareRequest request;
request.set_input(11);
grpc::Status status = stub_->GetSquare(&client_context_, request, &result);
EXPECT_TRUE(status.ok());
EXPECT_EQ(result.output(), 121);
server_->Shutdown();
}
TEST_F(ServerTest, ProcessBidiStreamingRpcTest) {
server_->Start();
auto reader_writer = stub_->GetRunningSum(&client_context_);
for (int i = 0; i < 3; ++i) {
proto::GetSumRequest request;
request.set_input(i);
EXPECT_TRUE(reader_writer->Write(request));
}
reader_writer->WritesDone();
proto::GetSumResponse response;
std::list<int> expected_responses = {0, 0, 1, 1, 3, 3};
while (reader_writer->Read(&response)) {
EXPECT_EQ(expected_responses.front(), response.output());
expected_responses.pop_front();
}
EXPECT_TRUE(expected_responses.empty());
server_->Shutdown();
}
} // namespace
} // namespace framework
} // namespace cartographer_grpc