text: /*
   *
   * Copyright 2016, 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 <grpc++/impl/codegen/config.h>
  #include <gtest/gtest.h>
  
  #include "src/core/ext/lb_policy/grpclb/load_balancer_api.h"
  #include "src/core/lib/iomgr/sockaddr.h"
  #include "src/core/lib/iomgr/sockaddr_utils.h"
  #include "src/proto/grpc/lb/v1/load_balancer.pb.h"  // C++ version
  
  namespace grpc {
  namespace {
  
  using grpc::lb::v1::LoadBalanceRequest;
  using grpc::lb::v1::LoadBalanceResponse;
  
  class GrpclbTest : public ::testing::Test {};
  
  grpc::string Ip4ToPackedString(const char* ip_str) {
    struct in_addr ip4;
    GPR_ASSERT(inet_pton(AF_INET, ip_str, &ip4) == 1);
    return grpc::string(reinterpret_cast<const char*>(&ip4), sizeof(ip4));
  }
  
  grpc::string PackedStringToIp(const grpc_grpclb_ip_address& pb_ip) {
    char ip_str[46] = {0};
    int af = -1;
    if (pb_ip.size == 4) {
      af = AF_INET;
    } else if (pb_ip.size == 16) {
      af = AF_INET6;
    } else {
      abort();
    }
    GPR_ASSERT(inet_ntop(af, (void*)pb_ip.bytes, ip_str, 46) != NULL);
    return ip_str;
  }
  
  TEST_F(GrpclbTest, CreateRequest) {
    const grpc::string service_name = "AServiceName";
    LoadBalanceRequest request;
    grpc_grpclb_request* c_req = grpc_grpclb_request_create(service_name.c_str());
    grpc_slice slice = grpc_grpclb_request_encode(c_req);
    const int num_bytes_written = GRPC_SLICE_LENGTH(slice);
    EXPECT_GT(num_bytes_written, 0);
    request.ParseFromArray(GRPC_SLICE_START_PTR(slice), num_bytes_written);
    EXPECT_EQ(request.initial_request().name(), service_name);
    grpc_slice_unref(slice);
    grpc_grpclb_request_destroy(c_req);
  }
  
  TEST_F(GrpclbTest, ParseInitialResponse) {
    LoadBalanceResponse response;
    auto* initial_response = response.mutable_initial_response();
    auto* client_stats_report_interval =
        initial_response->mutable_client_stats_report_interval();
    client_stats_report_interval->set_seconds(123);
    client_stats_report_interval->set_nanos(456);
    const grpc::string encoded_response = response.SerializeAsString();
    grpc_slice encoded_slice =
        grpc_slice_from_copied_string(encoded_response.c_str());
  
    grpc_grpclb_initial_response* c_initial_response =
        grpc_grpclb_initial_response_parse(encoded_slice);
    EXPECT_FALSE(c_initial_response->has_load_balancer_delegate);
    EXPECT_EQ(c_initial_response->client_stats_report_interval.seconds, 123);
    EXPECT_EQ(c_initial_response->client_stats_report_interval.nanos, 456);
    grpc_slice_unref(encoded_slice);
    grpc_grpclb_initial_response_destroy(c_initial_response);
  }
  
  TEST_F(GrpclbTest, ParseResponseServerList) {
    LoadBalanceResponse response;
    auto* serverlist = response.mutable_server_list();
    auto* server = serverlist->add_servers();
    server->set_ip_address(Ip4ToPackedString("127.0.0.1"));
    server->set_port(12345);
    server->set_drop_request(true);
    server = response.mutable_server_list()->add_servers();
    server->set_ip_address(Ip4ToPackedString("10.0.0.1"));
    server->set_port(54321);
    server->set_drop_request(false);
    auto* expiration_interval = serverlist->mutable_expiration_interval();
    expiration_interval->set_seconds(888);
    expiration_interval->set_nanos(999);
  
    const grpc::string encoded_response = response.SerializeAsString();
    const grpc_slice encoded_slice = grpc_slice_from_copied_buffer(
        encoded_response.data(), encoded_response.size());
    grpc_grpclb_serverlist* c_serverlist =
        grpc_grpclb_response_parse_serverlist(encoded_slice);
    ASSERT_EQ(c_serverlist->num_servers, 2ul);
    EXPECT_TRUE(c_serverlist->servers[0]->has_ip_address);
    EXPECT_EQ(PackedStringToIp(c_serverlist->servers[0]->ip_address),
              "127.0.0.1");
    EXPECT_EQ(c_serverlist->servers[0]->port, 12345);
    EXPECT_TRUE(c_serverlist->servers[0]->drop_request);
    EXPECT_TRUE(c_serverlist->servers[1]->has_ip_address);
  
    EXPECT_EQ(PackedStringToIp(c_serverlist->servers[1]->ip_address), "10.0.0.1");
    EXPECT_EQ(c_serverlist->servers[1]->port, 54321);
    EXPECT_FALSE(c_serverlist->servers[1]->drop_request);
  
    EXPECT_TRUE(c_serverlist->expiration_interval.has_seconds);
    EXPECT_EQ(c_serverlist->expiration_interval.seconds, 888);
    EXPECT_TRUE(c_serverlist->expiration_interval.has_nanos);
    EXPECT_EQ(c_serverlist->expiration_interval.nanos, 999);
  
    grpc_slice_unref(encoded_slice);
    grpc_grpclb_destroy_serverlist(c_serverlist);
  }
  
  }  // namespace
  }  // namespace grpc
  
  int main(int argc, char** argv) {
    ::testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
  }
  