The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#) https://grpc.io/
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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <thread>
#include "test/core/util/port.h"
#include "test/core/util/test_config.h"
#include "test/cpp/util/echo_duplicate.grpc.pb.h"
#include "test/cpp/util/echo.grpc.pb.h"
#include <grpc++/channel_arguments.h>
#include <grpc++/channel_interface.h>
#include <grpc++/client_context.h>
#include <grpc++/create_channel.h>
#include <grpc++/credentials.h>
#include <grpc++/dynamic_thread_pool.h>
#include <grpc++/server.h>
#include <grpc++/server_builder.h>
#include <grpc++/server_context.h>
#include <grpc++/server_credentials.h>
#include <grpc++/status.h>
#include <grpc++/stream.h>
#include <grpc++/time.h>
#include <gtest/gtest.h>
#include <grpc/grpc.h>
#include <grpc/support/thd.h>
#include <grpc/support/time.h>
using grpc::cpp::test::util::EchoRequest;
using grpc::cpp::test::util::EchoResponse;
using grpc::cpp::test::util::TestService;
using std::chrono::system_clock;
namespace grpc {
namespace testing {
namespace {
template <class W, class R>
class MockClientReaderWriter GRPC_FINAL
: public ClientReaderWriterInterface<W, R> {
public:
void WaitForInitialMetadata() {}
bool Read(R* msg) GRPC_OVERRIDE { return true; }
bool Write(const W& msg) GRPC_OVERRIDE { return true; }
bool WritesDone() GRPC_OVERRIDE { return true; }
Status Finish() GRPC_OVERRIDE { return Status::OK; }
};
template <>
class MockClientReaderWriter<EchoRequest, EchoResponse> GRPC_FINAL
: public ClientReaderWriterInterface<EchoRequest, EchoResponse> {
public:
MockClientReaderWriter() : writes_done_(false) {}
void WaitForInitialMetadata() {}
bool Read(EchoResponse* msg) GRPC_OVERRIDE {
if (writes_done_) return false;
msg->set_message(last_message_);
return true;
}
bool Write(const EchoRequest& msg,
const WriteOptions& options) GRPC_OVERRIDE {
gpr_log(GPR_INFO, "mock recv msg %s", msg.message().c_str());
last_message_ = msg.message();
return true;
}
bool WritesDone() GRPC_OVERRIDE {
writes_done_ = true;
return true;
}
Status Finish() GRPC_OVERRIDE { return Status::OK; }
private:
bool writes_done_;
grpc::string last_message_;
};
// Mocked stub.
class MockStub : public TestService::StubInterface {
public:
MockStub() {}
~MockStub() {}
Status Echo(ClientContext* context, const EchoRequest& request,
EchoResponse* response) GRPC_OVERRIDE {
response->set_message(request.message());
return Status::OK;
}
Status Unimplemented(ClientContext* context, const EchoRequest& request,
EchoResponse* response) GRPC_OVERRIDE {
return Status::OK;
}
private:
ClientAsyncResponseReaderInterface<EchoResponse>* AsyncEchoRaw(
ClientContext* context, const EchoRequest& request,
CompletionQueue* cq) GRPC_OVERRIDE {
return nullptr;
}
ClientWriterInterface<EchoRequest>* RequestStreamRaw(
ClientContext* context, EchoResponse* response) GRPC_OVERRIDE {
return nullptr;
}
ClientAsyncWriterInterface<EchoRequest>* AsyncRequestStreamRaw(
ClientContext* context, EchoResponse* response, CompletionQueue* cq,
void* tag) GRPC_OVERRIDE {
return nullptr;
}
ClientReaderInterface<EchoResponse>* ResponseStreamRaw(
ClientContext* context, const EchoRequest& request) GRPC_OVERRIDE {
return nullptr;
}
ClientAsyncReaderInterface<EchoResponse>* AsyncResponseStreamRaw(
ClientContext* context, const EchoRequest& request, CompletionQueue* cq,
void* tag) GRPC_OVERRIDE {
return nullptr;
}
ClientReaderWriterInterface<EchoRequest, EchoResponse>* BidiStreamRaw(
ClientContext* context) GRPC_OVERRIDE {
return new MockClientReaderWriter<EchoRequest, EchoResponse>();
}
ClientAsyncReaderWriterInterface<EchoRequest, EchoResponse>*
AsyncBidiStreamRaw(ClientContext* context, CompletionQueue* cq,
void* tag) GRPC_OVERRIDE {
return nullptr;
}
ClientAsyncResponseReaderInterface<EchoResponse>* AsyncUnimplementedRaw(
ClientContext* context, const EchoRequest& request,
CompletionQueue* cq) GRPC_OVERRIDE {
return nullptr;
}
};
class FakeClient {
public:
explicit FakeClient(TestService::StubInterface* stub) : stub_(stub) {}
void DoEcho() {
ClientContext context;
EchoRequest request;
EchoResponse response;
request.set_message("hello world");
Status s = stub_->Echo(&context, request, &response);
EXPECT_EQ(request.message(), response.message());
EXPECT_TRUE(s.ok());
}
void DoBidiStream() {
EchoRequest request;
EchoResponse response;
ClientContext context;
grpc::string msg("hello");
std::unique_ptr<ClientReaderWriterInterface<EchoRequest, EchoResponse>>
stream = stub_->BidiStream(&context);
request.set_message(msg + "0");
EXPECT_TRUE(stream->Write(request));
EXPECT_TRUE(stream->Read(&response));
EXPECT_EQ(response.message(), request.message());
request.set_message(msg + "1");
EXPECT_TRUE(stream->Write(request));
EXPECT_TRUE(stream->Read(&response));
EXPECT_EQ(response.message(), request.message());
request.set_message(msg + "2");
EXPECT_TRUE(stream->Write(request));
EXPECT_TRUE(stream->Read(&response));
EXPECT_EQ(response.message(), request.message());
stream->WritesDone();
EXPECT_FALSE(stream->Read(&response));
Status s = stream->Finish();
EXPECT_TRUE(s.ok());
}
void ResetStub(TestService::StubInterface* stub) { stub_ = stub; }
private:
TestService::StubInterface* stub_;
};
class TestServiceImpl : public TestService::Service {
public:
Status Echo(ServerContext* context, const EchoRequest* request,
EchoResponse* response) GRPC_OVERRIDE {
response->set_message(request->message());
return Status::OK;
}
Status BidiStream(ServerContext* context,
ServerReaderWriter<EchoResponse, EchoRequest>* stream)
GRPC_OVERRIDE {
EchoRequest request;
EchoResponse response;
while (stream->Read(&request)) {
gpr_log(GPR_INFO, "recv msg %s", request.message().c_str());
response.set_message(request.message());
stream->Write(response);
}
return Status::OK;
}
};
class MockTest : public ::testing::Test {
protected:
MockTest() : thread_pool_(2) {}
void SetUp() GRPC_OVERRIDE {
int port = grpc_pick_unused_port_or_die();
server_address_ << "localhost:" << port;
// Setup server
ServerBuilder builder;
builder.AddListeningPort(server_address_.str(),
InsecureServerCredentials());
builder.RegisterService(&service_);
builder.SetThreadPool(&thread_pool_);
server_ = builder.BuildAndStart();
}
void TearDown() GRPC_OVERRIDE { server_->Shutdown(); }
void ResetStub() {
std::shared_ptr<ChannelInterface> channel = CreateChannel(
server_address_.str(), InsecureCredentials(), ChannelArguments());
stub_ = std::move(grpc::cpp::test::util::TestService::NewStub(channel));
}
std::unique_ptr<grpc::cpp::test::util::TestService::Stub> stub_;
std::unique_ptr<Server> server_;
std::ostringstream server_address_;
TestServiceImpl service_;
DynamicThreadPool thread_pool_;
};
// Do one real rpc and one mocked one
TEST_F(MockTest, SimpleRpc) {
ResetStub();
FakeClient client(stub_.get());
client.DoEcho();
MockStub stub;
client.ResetStub(&stub);
client.DoEcho();
}
TEST_F(MockTest, BidiStream) {
ResetStub();
FakeClient client(stub_.get());
client.DoBidiStream();
MockStub stub;
client.ResetStub(&stub);
client.DoBidiStream();
}
} // namespace
} // namespace testing
} // namespace grpc
int main(int argc, char** argv) {
grpc_test_init(argc, argv);
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}