test/cpp/interop/interop_client.cc - platform/external/grpc-grpc - Gitiles

 /*
  *
  * 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 "test/cpp/interop/interop_client.h"

 #include <memory>

 #include <unistd.h>

 #include <grpc/grpc.h>
 #include <grpc/support/log.h>
 #include <grpc++/channel_interface.h>
 #include <grpc++/client_context.h>
 #include <grpc++/status.h>
 #include <grpc++/stream.h>
 #include "test/proto/test.grpc.pb.h"
 #include "test/cpp/interop/empty.grpc.pb.h"
 #include "test/cpp/interop/messages.grpc.pb.h"

 namespace grpc {
 namespace testing {

 namespace {
 // The same value is defined by the Java client.
 const std::vector<int> request_stream_sizes = {27182, 8, 1828, 45904};
 const std::vector<int> response_stream_sizes = {31415, 9, 2653, 58979};
 const int kNumResponseMessages = 2000;
 const int kResponseMessageSize = 1030;
 const int kReceiveDelayMilliSeconds = 20;
 const int kLargeRequestSize = 314159;
 const int kLargeResponseSize = 271812;
 }  // namespace

 InteropClient::InteropClient(std::shared_ptr<ChannelInterface> channel)
     : channel_(channel) {}

 void InteropClient::AssertOkOrPrintErrorStatus(const Status& s) {
   if (s.IsOk()) {
     return;
   }
   gpr_log(GPR_INFO, "Error status code: %d, message: %s", s.code(),
           s.details().c_str());
   GPR_ASSERT(0);
 }

 void InteropClient::DoEmpty() {
   gpr_log(GPR_INFO, "Sending an empty rpc...");
   std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

   Empty request = Empty::default_instance();
   Empty response = Empty::default_instance();
   ClientContext context;

   Status s = stub->EmptyCall(&context, request, &response);
   AssertOkOrPrintErrorStatus(s);

   gpr_log(GPR_INFO, "Empty rpc done.");
 }

 // Shared code to set large payload, make rpc and check response payload.
 void InteropClient::PerformLargeUnary(SimpleRequest* request,
                                       SimpleResponse* response) {
   std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

   ClientContext context;
   request->set_response_type(PayloadType::COMPRESSABLE);
   request->set_response_size(kLargeResponseSize);
   grpc::string payload(kLargeRequestSize, '\0');
   request->mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);

   Status s = stub->UnaryCall(&context, *request, response);

   AssertOkOrPrintErrorStatus(s);
   GPR_ASSERT(response->payload().type() == PayloadType::COMPRESSABLE);
   GPR_ASSERT(response->payload().body() ==
              grpc::string(kLargeResponseSize, '\0'));
 }

 void InteropClient::DoComputeEngineCreds(
     const grpc::string& default_service_account,
     const grpc::string& oauth_scope) {
   gpr_log(GPR_INFO,
           "Sending a large unary rpc with compute engine credentials ...");
   SimpleRequest request;
   SimpleResponse response;
   request.set_fill_username(true);
   request.set_fill_oauth_scope(true);
   PerformLargeUnary(&request, &response);
   gpr_log(GPR_INFO, "Got username %s", response.username().c_str());
   gpr_log(GPR_INFO, "Got oauth_scope %s", response.oauth_scope().c_str());
   GPR_ASSERT(!response.username().empty());
   GPR_ASSERT(response.username().c_str() == default_service_account);
   GPR_ASSERT(!response.oauth_scope().empty());
   const char* oauth_scope_str = response.oauth_scope().c_str();
   GPR_ASSERT(oauth_scope.find(oauth_scope_str) != grpc::string::npos);
   gpr_log(GPR_INFO, "Large unary with compute engine creds done.");
 }

 void InteropClient::DoServiceAccountCreds(const grpc::string& username,
                                           const grpc::string& oauth_scope) {
   gpr_log(GPR_INFO,
           "Sending a large unary rpc with service account credentials ...");
   SimpleRequest request;
   SimpleResponse response;
   request.set_fill_username(true);
   request.set_fill_oauth_scope(true);
   PerformLargeUnary(&request, &response);
   GPR_ASSERT(!response.username().empty());
   GPR_ASSERT(!response.oauth_scope().empty());
   GPR_ASSERT(username.find(response.username()) != grpc::string::npos);
   const char* oauth_scope_str = response.oauth_scope().c_str();
   GPR_ASSERT(oauth_scope.find(oauth_scope_str) != grpc::string::npos);
   gpr_log(GPR_INFO, "Large unary with service account creds done.");
 }

 void InteropClient::DoJwtTokenCreds(const grpc::string& username) {
   gpr_log(GPR_INFO, "Sending a large unary rpc with JWT token credentials ...");
   SimpleRequest request;
   SimpleResponse response;
   request.set_fill_username(true);
   PerformLargeUnary(&request, &response);
   GPR_ASSERT(!response.username().empty());
   GPR_ASSERT(username.find(response.username()) != grpc::string::npos);
   gpr_log(GPR_INFO, "Large unary with JWT token creds done.");
 }

 void InteropClient::DoLargeUnary() {
   gpr_log(GPR_INFO, "Sending a large unary rpc...");
   SimpleRequest request;
   SimpleResponse response;
   PerformLargeUnary(&request, &response);
   gpr_log(GPR_INFO, "Large unary done.");
 }

 void InteropClient::DoRequestStreaming() {
   gpr_log(GPR_INFO, "Sending request steaming rpc ...");
   std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

   ClientContext context;
   StreamingInputCallRequest request;
   StreamingInputCallResponse response;

   std::unique_ptr<ClientWriter<StreamingInputCallRequest>> stream(
       stub->StreamingInputCall(&context, &response));

   int aggregated_payload_size = 0;
   for (unsigned int i = 0; i < request_stream_sizes.size(); ++i) {
     Payload* payload = request.mutable_payload();
     payload->set_body(grpc::string(request_stream_sizes[i], '\0'));
     GPR_ASSERT(stream->Write(request));
     aggregated_payload_size += request_stream_sizes[i];
   }
   stream->WritesDone();
   Status s = stream->Finish();

   GPR_ASSERT(response.aggregated_payload_size() == aggregated_payload_size);
   AssertOkOrPrintErrorStatus(s);
   gpr_log(GPR_INFO, "Request streaming done.");
 }

 void InteropClient::DoResponseStreaming() {
   gpr_log(GPR_INFO, "Receiving response steaming rpc ...");
   std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

   ClientContext context;
   StreamingOutputCallRequest request;
   for (unsigned int i = 0; i < response_stream_sizes.size(); ++i) {
     ResponseParameters* response_parameter = request.add_response_parameters();
     response_parameter->set_size(response_stream_sizes[i]);
   }
   StreamingOutputCallResponse response;
   std::unique_ptr<ClientReader<StreamingOutputCallResponse>> stream(
       stub->StreamingOutputCall(&context, request));

   unsigned int i = 0;
   while (stream->Read(&response)) {
     GPR_ASSERT(response.payload().body() ==
                grpc::string(response_stream_sizes[i], '\0'));
     ++i;
   }
   GPR_ASSERT(response_stream_sizes.size() == i);
   Status s = stream->Finish();

   AssertOkOrPrintErrorStatus(s);
   gpr_log(GPR_INFO, "Response streaming done.");
 }

 void InteropClient::DoResponseStreamingWithSlowConsumer() {
   gpr_log(GPR_INFO, "Receiving response steaming rpc with slow consumer ...");
   std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

   ClientContext context;
   StreamingOutputCallRequest request;

   for (int i = 0; i < kNumResponseMessages; ++i) {
     ResponseParameters* response_parameter = request.add_response_parameters();
     response_parameter->set_size(kResponseMessageSize);
   }
   StreamingOutputCallResponse response;
   std::unique_ptr<ClientReader<StreamingOutputCallResponse>> stream(
       stub->StreamingOutputCall(&context, request));

   int i = 0;
   while (stream->Read(&response)) {
     GPR_ASSERT(response.payload().body() ==
                grpc::string(kResponseMessageSize, '\0'));
     gpr_log(GPR_INFO, "received message %d", i);
     usleep(kReceiveDelayMilliSeconds * 1000);
     ++i;
   }
   GPR_ASSERT(kNumResponseMessages == i);
   Status s = stream->Finish();

   AssertOkOrPrintErrorStatus(s);
   gpr_log(GPR_INFO, "Response streaming done.");
 }

 void InteropClient::DoHalfDuplex() {
   gpr_log(GPR_INFO, "Sending half-duplex streaming rpc ...");
   std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

   ClientContext context;
   std::unique_ptr<ClientReaderWriter<StreamingOutputCallRequest,
                                      StreamingOutputCallResponse>>
       stream(stub->HalfDuplexCall(&context));

   StreamingOutputCallRequest request;
   ResponseParameters* response_parameter = request.add_response_parameters();
   for (unsigned int i = 0; i < response_stream_sizes.size(); ++i) {
     response_parameter->set_size(response_stream_sizes[i]);
     GPR_ASSERT(stream->Write(request));
   }
   stream->WritesDone();

   unsigned int i = 0;
   StreamingOutputCallResponse response;
   while (stream->Read(&response)) {
     GPR_ASSERT(response.payload().has_body());
     GPR_ASSERT(response.payload().body() ==
                grpc::string(response_stream_sizes[i], '\0'));
     ++i;
   }
   GPR_ASSERT(response_stream_sizes.size() == i);
   Status s = stream->Finish();
   AssertOkOrPrintErrorStatus(s);
   gpr_log(GPR_INFO, "Half-duplex streaming rpc done.");
 }

 void InteropClient::DoPingPong() {
   gpr_log(GPR_INFO, "Sending Ping Pong streaming rpc ...");
   std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

   ClientContext context;
   std::unique_ptr<ClientReaderWriter<StreamingOutputCallRequest,
                                      StreamingOutputCallResponse>>
       stream(stub->FullDuplexCall(&context));

   StreamingOutputCallRequest request;
   request.set_response_type(PayloadType::COMPRESSABLE);
   ResponseParameters* response_parameter = request.add_response_parameters();
   Payload* payload = request.mutable_payload();
   StreamingOutputCallResponse response;
   for (unsigned int i = 0; i < request_stream_sizes.size(); ++i) {
     response_parameter->set_size(response_stream_sizes[i]);
     payload->set_body(grpc::string(request_stream_sizes[i], '\0'));
     GPR_ASSERT(stream->Write(request));
     GPR_ASSERT(stream->Read(&response));
     GPR_ASSERT(response.payload().has_body());
     GPR_ASSERT(response.payload().body() ==
                grpc::string(response_stream_sizes[i], '\0'));
   }

   stream->WritesDone();
   GPR_ASSERT(!stream->Read(&response));
   Status s = stream->Finish();
   AssertOkOrPrintErrorStatus(s);
   gpr_log(GPR_INFO, "Ping pong streaming done.");
 }

 }  // namespace testing
 }  // namespace grpc
	/*
	*
	* 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 "test/cpp/interop/interop_client.h"

	#include <memory>

	#include <unistd.h>

	#include <grpc/grpc.h>
	#include <grpc/support/log.h>
	#include <grpc++/channel_interface.h>
	#include <grpc++/client_context.h>
	#include <grpc++/status.h>
	#include <grpc++/stream.h>
	#include "test/proto/test.grpc.pb.h"
	#include "test/cpp/interop/empty.grpc.pb.h"
	#include "test/cpp/interop/messages.grpc.pb.h"

	namespace grpc {
	namespace testing {

	namespace {
	// The same value is defined by the Java client.
	const std::vector<int> request_stream_sizes = {27182, 8, 1828, 45904};
	const std::vector<int> response_stream_sizes = {31415, 9, 2653, 58979};
	const int kNumResponseMessages = 2000;
	const int kResponseMessageSize = 1030;
	const int kReceiveDelayMilliSeconds = 20;
	const int kLargeRequestSize = 314159;
	const int kLargeResponseSize = 271812;
	} // namespace

	InteropClient::InteropClient(std::shared_ptr<ChannelInterface> channel)
	: channel_(channel) {}

	void InteropClient::AssertOkOrPrintErrorStatus(const Status& s) {
	if (s.IsOk()) {
	return;
	}
	gpr_log(GPR_INFO, "Error status code: %d, message: %s", s.code(),
	s.details().c_str());
	GPR_ASSERT(0);
	}

	void InteropClient::DoEmpty() {
	gpr_log(GPR_INFO, "Sending an empty rpc...");
	std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

	Empty request = Empty::default_instance();
	Empty response = Empty::default_instance();
	ClientContext context;

	Status s = stub->EmptyCall(&context, request, &response);
	AssertOkOrPrintErrorStatus(s);

	gpr_log(GPR_INFO, "Empty rpc done.");
	}

	// Shared code to set large payload, make rpc and check response payload.
	void InteropClient::PerformLargeUnary(SimpleRequest* request,
	SimpleResponse* response) {
	std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

	ClientContext context;
	request->set_response_type(PayloadType::COMPRESSABLE);
	request->set_response_size(kLargeResponseSize);
	grpc::string payload(kLargeRequestSize, '\0');
	request->mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);

	Status s = stub->UnaryCall(&context, *request, response);

	AssertOkOrPrintErrorStatus(s);
	GPR_ASSERT(response->payload().type() == PayloadType::COMPRESSABLE);
	GPR_ASSERT(response->payload().body() ==
	grpc::string(kLargeResponseSize, '\0'));
	}

	void InteropClient::DoComputeEngineCreds(
	const grpc::string& default_service_account,
	const grpc::string& oauth_scope) {
	gpr_log(GPR_INFO,
	"Sending a large unary rpc with compute engine credentials ...");
	SimpleRequest request;
	SimpleResponse response;
	request.set_fill_username(true);
	request.set_fill_oauth_scope(true);
	PerformLargeUnary(&request, &response);
	gpr_log(GPR_INFO, "Got username %s", response.username().c_str());
	gpr_log(GPR_INFO, "Got oauth_scope %s", response.oauth_scope().c_str());
	GPR_ASSERT(!response.username().empty());
	GPR_ASSERT(response.username().c_str() == default_service_account);
	GPR_ASSERT(!response.oauth_scope().empty());
	const char* oauth_scope_str = response.oauth_scope().c_str();
	GPR_ASSERT(oauth_scope.find(oauth_scope_str) != grpc::string::npos);
	gpr_log(GPR_INFO, "Large unary with compute engine creds done.");
	}

	void InteropClient::DoServiceAccountCreds(const grpc::string& username,
	const grpc::string& oauth_scope) {
	gpr_log(GPR_INFO,
	"Sending a large unary rpc with service account credentials ...");
	SimpleRequest request;
	SimpleResponse response;
	request.set_fill_username(true);
	request.set_fill_oauth_scope(true);
	PerformLargeUnary(&request, &response);
	GPR_ASSERT(!response.username().empty());
	GPR_ASSERT(!response.oauth_scope().empty());
	GPR_ASSERT(username.find(response.username()) != grpc::string::npos);
	const char* oauth_scope_str = response.oauth_scope().c_str();
	GPR_ASSERT(oauth_scope.find(oauth_scope_str) != grpc::string::npos);
	gpr_log(GPR_INFO, "Large unary with service account creds done.");
	}

	void InteropClient::DoJwtTokenCreds(const grpc::string& username) {
	gpr_log(GPR_INFO, "Sending a large unary rpc with JWT token credentials ...");
	SimpleRequest request;
	SimpleResponse response;
	request.set_fill_username(true);
	PerformLargeUnary(&request, &response);
	GPR_ASSERT(!response.username().empty());
	GPR_ASSERT(username.find(response.username()) != grpc::string::npos);
	gpr_log(GPR_INFO, "Large unary with JWT token creds done.");
	}

	void InteropClient::DoLargeUnary() {
	gpr_log(GPR_INFO, "Sending a large unary rpc...");
	SimpleRequest request;
	SimpleResponse response;
	PerformLargeUnary(&request, &response);
	gpr_log(GPR_INFO, "Large unary done.");
	}

	void InteropClient::DoRequestStreaming() {
	gpr_log(GPR_INFO, "Sending request steaming rpc ...");
	std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

	ClientContext context;
	StreamingInputCallRequest request;
	StreamingInputCallResponse response;

	std::unique_ptr<ClientWriter<StreamingInputCallRequest>> stream(
	stub->StreamingInputCall(&context, &response));

	int aggregated_payload_size = 0;
	for (unsigned int i = 0; i < request_stream_sizes.size(); ++i) {
	Payload* payload = request.mutable_payload();
	payload->set_body(grpc::string(request_stream_sizes[i], '\0'));
	GPR_ASSERT(stream->Write(request));
	aggregated_payload_size += request_stream_sizes[i];
	}
	stream->WritesDone();
	Status s = stream->Finish();

	GPR_ASSERT(response.aggregated_payload_size() == aggregated_payload_size);
	AssertOkOrPrintErrorStatus(s);
	gpr_log(GPR_INFO, "Request streaming done.");
	}

	void InteropClient::DoResponseStreaming() {
	gpr_log(GPR_INFO, "Receiving response steaming rpc ...");
	std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

	ClientContext context;
	StreamingOutputCallRequest request;
	for (unsigned int i = 0; i < response_stream_sizes.size(); ++i) {
	ResponseParameters* response_parameter = request.add_response_parameters();
	response_parameter->set_size(response_stream_sizes[i]);
	}
	StreamingOutputCallResponse response;
	std::unique_ptr<ClientReader<StreamingOutputCallResponse>> stream(
	stub->StreamingOutputCall(&context, request));

	unsigned int i = 0;
	while (stream->Read(&response)) {
	GPR_ASSERT(response.payload().body() ==
	grpc::string(response_stream_sizes[i], '\0'));
	++i;
	}
	GPR_ASSERT(response_stream_sizes.size() == i);
	Status s = stream->Finish();

	AssertOkOrPrintErrorStatus(s);
	gpr_log(GPR_INFO, "Response streaming done.");
	}

	void InteropClient::DoResponseStreamingWithSlowConsumer() {
	gpr_log(GPR_INFO, "Receiving response steaming rpc with slow consumer ...");
	std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

	ClientContext context;
	StreamingOutputCallRequest request;

	for (int i = 0; i < kNumResponseMessages; ++i) {
	ResponseParameters* response_parameter = request.add_response_parameters();
	response_parameter->set_size(kResponseMessageSize);
	}
	StreamingOutputCallResponse response;
	std::unique_ptr<ClientReader<StreamingOutputCallResponse>> stream(
	stub->StreamingOutputCall(&context, request));

	int i = 0;
	while (stream->Read(&response)) {
	GPR_ASSERT(response.payload().body() ==
	grpc::string(kResponseMessageSize, '\0'));
	gpr_log(GPR_INFO, "received message %d", i);
	usleep(kReceiveDelayMilliSeconds * 1000);
	++i;
	}
	GPR_ASSERT(kNumResponseMessages == i);
	Status s = stream->Finish();

	AssertOkOrPrintErrorStatus(s);
	gpr_log(GPR_INFO, "Response streaming done.");
	}

	void InteropClient::DoHalfDuplex() {
	gpr_log(GPR_INFO, "Sending half-duplex streaming rpc ...");
	std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

	ClientContext context;
	std::unique_ptr<ClientReaderWriter<StreamingOutputCallRequest,
	StreamingOutputCallResponse>>
	stream(stub->HalfDuplexCall(&context));

	StreamingOutputCallRequest request;
	ResponseParameters* response_parameter = request.add_response_parameters();
	for (unsigned int i = 0; i < response_stream_sizes.size(); ++i) {
	response_parameter->set_size(response_stream_sizes[i]);
	GPR_ASSERT(stream->Write(request));
	}
	stream->WritesDone();

	unsigned int i = 0;
	StreamingOutputCallResponse response;
	while (stream->Read(&response)) {
	GPR_ASSERT(response.payload().has_body());
	GPR_ASSERT(response.payload().body() ==
	grpc::string(response_stream_sizes[i], '\0'));
	++i;
	}
	GPR_ASSERT(response_stream_sizes.size() == i);
	Status s = stream->Finish();
	AssertOkOrPrintErrorStatus(s);
	gpr_log(GPR_INFO, "Half-duplex streaming rpc done.");
	}

	void InteropClient::DoPingPong() {
	gpr_log(GPR_INFO, "Sending Ping Pong streaming rpc ...");
	std::unique_ptr<TestService::Stub> stub(TestService::NewStub(channel_));

	ClientContext context;
	std::unique_ptr<ClientReaderWriter<StreamingOutputCallRequest,
	StreamingOutputCallResponse>>
	stream(stub->FullDuplexCall(&context));

	StreamingOutputCallRequest request;
	request.set_response_type(PayloadType::COMPRESSABLE);
	ResponseParameters* response_parameter = request.add_response_parameters();
	Payload* payload = request.mutable_payload();
	StreamingOutputCallResponse response;
	for (unsigned int i = 0; i < request_stream_sizes.size(); ++i) {
	response_parameter->set_size(response_stream_sizes[i]);
	payload->set_body(grpc::string(request_stream_sizes[i], '\0'));
	GPR_ASSERT(stream->Write(request));
	GPR_ASSERT(stream->Read(&response));
	GPR_ASSERT(response.payload().has_body());
	GPR_ASSERT(response.payload().body() ==
	grpc::string(response_stream_sizes[i], '\0'));
	}

	stream->WritesDone();
	GPR_ASSERT(!stream->Read(&response));
	Status s = stream->Finish();
	AssertOkOrPrintErrorStatus(s);
	gpr_log(GPR_INFO, "Ping pong streaming done.");
	}

	} // namespace testing
	} // namespace grpc