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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 "test/core/util/test_config.h"
#include "test/cpp/util/cli_call.h"
#include "test/cpp/util/echo.grpc.pb.h"
#include "src/cpp/server/thread_pool.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++/server.h>
#include <grpc++/server_builder.h>
#include <grpc++/server_context.h>
#include <grpc++/server_credentials.h>
#include <grpc++/status.h>
#include "test/core/util/port.h"
#include <gtest/gtest.h>

#include <grpc/grpc.h>

using grpc::cpp::test::util::EchoRequest;
using grpc::cpp::test::util::EchoResponse;

namespace grpc {
namespace testing {

class TestServiceImpl : public ::grpc::cpp::test::util::TestService::Service {
 public:
  Status Echo(ServerContext* context, const EchoRequest* request,
              EchoResponse* response) GRPC_OVERRIDE {
    response->set_message(request->message());
    return Status::OK;
  }
};

class CliCallTest : public ::testing::Test {
 protected:
  CliCallTest() : 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() {
    channel_ = CreateChannel(server_address_.str(), InsecureCredentials(),
                             ChannelArguments());
    stub_ = std::move(grpc::cpp::test::util::TestService::NewStub(channel_));
  }

  std::shared_ptr<ChannelInterface> channel_;
  std::unique_ptr<grpc::cpp::test::util::TestService::Stub> stub_;
  std::unique_ptr<Server> server_;
  std::ostringstream server_address_;
  TestServiceImpl service_;
  ThreadPool thread_pool_;
};

// Send a rpc with a normal stub and then a CliCall. Verify they match.
TEST_F(CliCallTest, SimpleRpc) {
  ResetStub();
  // Normal stub.
  EchoRequest request;
  EchoResponse response;
  request.set_message("Hello");

  ClientContext context;
  Status s = stub_->Echo(&context, request, &response);
  EXPECT_EQ(response.message(), request.message());
  EXPECT_TRUE(s.IsOk());

  const grpc::string kMethod("/grpc.cpp.test.util.TestService/Echo");
  grpc::string request_bin, response_bin, expected_response_bin;
  EXPECT_TRUE(request.SerializeToString(&request_bin));
  EXPECT_TRUE(response.SerializeToString(&expected_response_bin));
  CliCall::Call(channel_, kMethod, request_bin, &response_bin);
  EXPECT_EQ(expected_response_bin, response_bin);
}

}  // namespace testing
}  // namespace grpc

int main(int argc, char** argv) {
  grpc_test_init(argc, argv);
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}