test/cpp/end2end/service_config_end2end_test.cc

   1 /*
   2  *
   3  * Copyright 2016 gRPC authors.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  *
  17  */
  18
  19 #include <algorithm>
  20 #include <memory>
  21 #include <mutex>
  22 #include <random>
  23 #include <set>
  24 #include <thread>
  25
  26 #include <grpc/grpc.h>
  27 #include <grpc/support/alloc.h>
  28 #include <grpc/support/atm.h>
  29 #include <grpc/support/log.h>
  30 #include <grpc/support/string_util.h>
  31 #include <grpc/support/time.h>
  32 #include <grpcpp/channel.h>
  33 #include <grpcpp/client_context.h>
  34 #include <grpcpp/create_channel.h>
  35 #include <grpcpp/health_check_service_interface.h>
  36 #include <grpcpp/impl/codegen/sync.h>
  37 #include <grpcpp/server.h>
  38 #include <grpcpp/server_builder.h>
  39 #include <grpcpp/support/validate_service_config.h>
  40
  41 #include "src/core/ext/filters/client_channel/backup_poller.h"
  42 #include "src/core/ext/filters/client_channel/global_subchannel_pool.h"
  43 #include "src/core/ext/filters/client_channel/parse_address.h"
  44 #include "src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h"
  45 #include "src/core/ext/filters/client_channel/server_address.h"
  46 #include "src/core/lib/backoff/backoff.h"
  47 #include "src/core/lib/channel/channel_args.h"
  48 #include "src/core/lib/gprpp/debug_location.h"
  49 #include "src/core/lib/gprpp/ref_counted_ptr.h"
  50 #include "src/core/lib/iomgr/tcp_client.h"
  51 #include "src/core/lib/security/credentials/fake/fake_credentials.h"
  52 #include "src/cpp/client/secure_credentials.h"
  53 #include "src/cpp/server/secure_server_credentials.h"
  54
  55 #include "src/proto/grpc/testing/echo.grpc.pb.h"
  56 #include "test/core/util/port.h"
  57 #include "test/core/util/test_config.h"
  58 #include "test/cpp/end2end/test_service_impl.h"
  59
  60 #include <gmock/gmock.h>
  61 #include <gtest/gtest.h>
  62
  63 using grpc::testing::EchoRequest;
  64 using grpc::testing::EchoResponse;
  65 using std::chrono::system_clock;
  66
  67 namespace grpc {
  68 namespace testing {
  69 namespace {
  70
  71 // Subclass of TestServiceImpl that increments a request counter for
  72 // every call to the Echo RPC.
  73 class MyTestServiceImpl : public TestServiceImpl {
  74  public:
  75   MyTestServiceImpl() : request_count_(0) {}
  76
  77   Status Echo(ServerContext* context, const EchoRequest* request,
  78               EchoResponse* response) override {
  79     {
  80       grpc::internal::MutexLock lock(&mu_);
  81       ++request_count_;
  82     }
  83     AddClient(context->peer());
  84     return TestServiceImpl::Echo(context, request, response);
  85   }
  86
  87   int request_count() {
  88     grpc::internal::MutexLock lock(&mu_);
  89     return request_count_;
  90   }
  91
  92   void ResetCounters() {
  93     grpc::internal::MutexLock lock(&mu_);
  94     request_count_ = 0;
  95   }
  96
  97   std::set<grpc::string> clients() {
  98     grpc::internal::MutexLock lock(&clients_mu_);
  99     return clients_;
 100   }
 101
 102  private:
 103   void AddClient(const grpc::string& client) {
 104     grpc::internal::MutexLock lock(&clients_mu_);
 105     clients_.insert(client);
 106   }
 107
 108   grpc::internal::Mutex mu_;
 109   int request_count_;
 110   grpc::internal::Mutex clients_mu_;
 111   std::set<grpc::string> clients_;
 112 };
 113
 114 class ServiceConfigEnd2endTest : public ::testing::Test {
 115  protected:
 116   ServiceConfigEnd2endTest()
 117       : server_host_("localhost"),
 118         kRequestMessage_("Live long and prosper."),
 119         creds_(new SecureChannelCredentials(
 120             grpc_fake_transport_security_credentials_create())) {}
 121
 122   static void SetUpTestCase() {
 123     // Make the backup poller poll very frequently in order to pick up
 124     // updates from all the subchannels's FDs.
 125     GPR_GLOBAL_CONFIG_SET(grpc_client_channel_backup_poll_interval_ms, 1);
 126   }
 127
 128   void SetUp() override {
 129     grpc_init();
 130     response_generator_ =
 131         grpc_core::MakeRefCounted<grpc_core::FakeResolverResponseGenerator>();
 132   }
 133
 134   void TearDown() override {
 135     for (size_t i = 0; i < servers_.size(); ++i) {
 136       servers_[i]->Shutdown();
 137     }
 138     // Explicitly destroy all the members so that we can make sure grpc_shutdown
 139     // has finished by the end of this function, and thus all the registered
 140     // LB policy factories are removed.
 141     stub_.reset();
 142     servers_.clear();
 143     creds_.reset();
 144     grpc_shutdown_blocking();
 145   }
 146
 147   void CreateServers(size_t num_servers,
 148                      std::vector<int> ports = std::vector<int>()) {
 149     servers_.clear();
 150     for (size_t i = 0; i < num_servers; ++i) {
 151       int port = 0;
 152       if (ports.size() == num_servers) port = ports[i];
 153       servers_.emplace_back(new ServerData(port));
 154     }
 155   }
 156
 157   void StartServer(size_t index) { servers_[index]->Start(server_host_); }
 158
 159   void StartServers(size_t num_servers,
 160                     std::vector<int> ports = std::vector<int>()) {
 161     CreateServers(num_servers, std::move(ports));
 162     for (size_t i = 0; i < num_servers; ++i) {
 163       StartServer(i);
 164     }
 165   }
 166
 167   grpc_core::Resolver::Result BuildFakeResults(const std::vector<int>& ports) {
 168     grpc_core::Resolver::Result result;
 169     for (const int& port : ports) {
 170       char* lb_uri_str;
 171       gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", port);
 172       grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
 173       GPR_ASSERT(lb_uri != nullptr);
 174       grpc_resolved_address address;
 175       GPR_ASSERT(grpc_parse_uri(lb_uri, &address));
 176       result.addresses.emplace_back(address.addr, address.len,
 177                                     nullptr /* args */);
 178       grpc_uri_destroy(lb_uri);
 179       gpr_free(lb_uri_str);
 180     }
 181     return result;
 182   }
 183
 184   void SetNextResolutionNoServiceConfig(const std::vector<int>& ports) {
 185     grpc_core::ExecCtx exec_ctx;
 186     grpc_core::Resolver::Result result = BuildFakeResults(ports);
 187     response_generator_->SetResponse(result);
 188   }
 189
 190   void SetNextResolutionValidServiceConfig(const std::vector<int>& ports) {
 191     grpc_core::ExecCtx exec_ctx;
 192     grpc_core::Resolver::Result result = BuildFakeResults(ports);
 193     result.service_config =
 194         grpc_core::ServiceConfig::Create("{}", &result.service_config_error);
 195     response_generator_->SetResponse(result);
 196   }
 197
 198   void SetNextResolutionInvalidServiceConfig(const std::vector<int>& ports) {
 199     grpc_core::ExecCtx exec_ctx;
 200     grpc_core::Resolver::Result result = BuildFakeResults(ports);
 201     result.service_config =
 202         grpc_core::ServiceConfig::Create("{", &result.service_config_error);
 203     response_generator_->SetResponse(result);
 204   }
 205
 206   void SetNextResolutionWithServiceConfig(const std::vector<int>& ports,
 207                                           const char* svc_cfg) {
 208     grpc_core::ExecCtx exec_ctx;
 209     grpc_core::Resolver::Result result = BuildFakeResults(ports);
 210     result.service_config =
 211         grpc_core::ServiceConfig::Create(svc_cfg, &result.service_config_error);
 212     response_generator_->SetResponse(result);
 213   }
 214
 215   std::vector<int> GetServersPorts(size_t start_index = 0) {
 216     std::vector<int> ports;
 217     for (size_t i = start_index; i < servers_.size(); ++i) {
 218       ports.push_back(servers_[i]->port_);
 219     }
 220     return ports;
 221   }
 222
 223   std::unique_ptr<grpc::testing::EchoTestService::Stub> BuildStub(
 224       const std::shared_ptr<Channel>& channel) {
 225     return grpc::testing::EchoTestService::NewStub(channel);
 226   }
 227
 228   std::shared_ptr<Channel> BuildChannel() {
 229     ChannelArguments args;
 230     args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR,
 231                     response_generator_.get());
 232     return ::grpc::CreateCustomChannel("fake:///", creds_, args);
 233   }
 234
 235   std::shared_ptr<Channel> BuildChannelWithDefaultServiceConfig() {
 236     ChannelArguments args;
 237     EXPECT_THAT(grpc::experimental::ValidateServiceConfigJSON(
 238                     ValidDefaultServiceConfig()),
 239                 ::testing::StrEq(""));
 240     args.SetServiceConfigJSON(ValidDefaultServiceConfig());
 241     args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR,
 242                     response_generator_.get());
 243     return ::grpc::CreateCustomChannel("fake:///", creds_, args);
 244   }
 245
 246   std::shared_ptr<Channel> BuildChannelWithInvalidDefaultServiceConfig() {
 247     ChannelArguments args;
 248     EXPECT_THAT(grpc::experimental::ValidateServiceConfigJSON(
 249                     InvalidDefaultServiceConfig()),
 250                 ::testing::HasSubstr("JSON parse error"));
 251     args.SetServiceConfigJSON(InvalidDefaultServiceConfig());
 252     args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR,
 253                     response_generator_.get());
 254     return ::grpc::CreateCustomChannel("fake:///", creds_, args);
 255   }
 256
 257   bool SendRpc(
 258       const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub,
 259       EchoResponse* response = nullptr, int timeout_ms = 1000,
 260       Status* result = nullptr, bool wait_for_ready = false) {
 261     const bool local_response = (response == nullptr);
 262     if (local_response) response = new EchoResponse;
 263     EchoRequest request;
 264     request.set_message(kRequestMessage_);
 265     ClientContext context;
 266     context.set_deadline(grpc_timeout_milliseconds_to_deadline(timeout_ms));
 267     if (wait_for_ready) context.set_wait_for_ready(true);
 268     Status status = stub->Echo(&context, request, response);
 269     if (result != nullptr) *result = status;
 270     if (local_response) delete response;
 271     return status.ok();
 272   }
 273
 274   void CheckRpcSendOk(
 275       const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub,
 276       const grpc_core::DebugLocation& location, bool wait_for_ready = false) {
 277     EchoResponse response;
 278     Status status;
 279     const bool success =
 280         SendRpc(stub, &response, 2000, &status, wait_for_ready);
 281     ASSERT_TRUE(success) << "From " << location.file() << ":" << location.line()
 282                          << "\n"
 283                          << "Error: " << status.error_message() << " "
 284                          << status.error_details();
 285     ASSERT_EQ(response.message(), kRequestMessage_)
 286         << "From " << location.file() << ":" << location.line();
 287     if (!success) abort();
 288   }
 289
 290   void CheckRpcSendFailure(
 291       const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub) {
 292     const bool success = SendRpc(stub);
 293     EXPECT_FALSE(success);
 294   }
 295
 296   struct ServerData {
 297     int port_;
 298     std::unique_ptr<Server> server_;
 299     MyTestServiceImpl service_;
 300     std::unique_ptr<std::thread> thread_;
 301     bool server_ready_ = false;
 302     bool started_ = false;
 303
 304     explicit ServerData(int port = 0) {
 305       port_ = port > 0 ? port : grpc_pick_unused_port_or_die();
 306     }
 307
 308     void Start(const grpc::string& server_host) {
 309       gpr_log(GPR_INFO, "starting server on port %d", port_);
 310       started_ = true;
 311       grpc::internal::Mutex mu;
 312       grpc::internal::MutexLock lock(&mu);
 313       grpc::internal::CondVar cond;
 314       thread_.reset(new std::thread(
 315           std::bind(&ServerData::Serve, this, server_host, &mu, &cond)));
 316       cond.WaitUntil(&mu, [this] { return server_ready_; });
 317       server_ready_ = false;
 318       gpr_log(GPR_INFO, "server startup complete");
 319     }
 320
 321     void Serve(const grpc::string& server_host, grpc::internal::Mutex* mu,
 322                grpc::internal::CondVar* cond) {
 323       std::ostringstream server_address;
 324       server_address << server_host << ":" << port_;
 325       ServerBuilder builder;
 326       std::shared_ptr<ServerCredentials> creds(new SecureServerCredentials(
 327           grpc_fake_transport_security_server_credentials_create()));
 328       builder.AddListeningPort(server_address.str(), std::move(creds));
 329       builder.RegisterService(&service_);
 330       server_ = builder.BuildAndStart();
 331       grpc::internal::MutexLock lock(mu);
 332       server_ready_ = true;
 333       cond->Signal();
 334     }
 335
 336     void Shutdown() {
 337       if (!started_) return;
 338       server_->Shutdown(grpc_timeout_milliseconds_to_deadline(0));
 339       thread_->join();
 340       started_ = false;
 341     }
 342
 343     void SetServingStatus(const grpc::string& service, bool serving) {
 344       server_->GetHealthCheckService()->SetServingStatus(service, serving);
 345     }
 346   };
 347
 348   void ResetCounters() {
 349     for (const auto& server : servers_) server->service_.ResetCounters();
 350   }
 351
 352   void WaitForServer(
 353       const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub,
 354       size_t server_idx, const grpc_core::DebugLocation& location,
 355       bool ignore_failure = false) {
 356     do {
 357       if (ignore_failure) {
 358         SendRpc(stub);
 359       } else {
 360         CheckRpcSendOk(stub, location, true);
 361       }
 362     } while (servers_[server_idx]->service_.request_count() == 0);
 363     ResetCounters();
 364   }
 365
 366   bool WaitForChannelNotReady(Channel* channel, int timeout_seconds = 5) {
 367     const gpr_timespec deadline =
 368         grpc_timeout_seconds_to_deadline(timeout_seconds);
 369     grpc_connectivity_state state;
 370     while ((state = channel->GetState(false /* try_to_connect */)) ==
 371            GRPC_CHANNEL_READY) {
 372       if (!channel->WaitForStateChange(state, deadline)) return false;
 373     }
 374     return true;
 375   }
 376
 377   bool WaitForChannelReady(Channel* channel, int timeout_seconds = 5) {
 378     const gpr_timespec deadline =
 379         grpc_timeout_seconds_to_deadline(timeout_seconds);
 380     grpc_connectivity_state state;
 381     while ((state = channel->GetState(true /* try_to_connect */)) !=
 382            GRPC_CHANNEL_READY) {
 383       if (!channel->WaitForStateChange(state, deadline)) return false;
 384     }
 385     return true;
 386   }
 387
 388   bool SeenAllServers() {
 389     for (const auto& server : servers_) {
 390       if (server->service_.request_count() == 0) return false;
 391     }
 392     return true;
 393   }
 394
 395   // Updates \a connection_order by appending to it the index of the newly
 396   // connected server. Must be called after every single RPC.
 397   void UpdateConnectionOrder(
 398       const std::vector<std::unique_ptr<ServerData>>& servers,
 399       std::vector<int>* connection_order) {
 400     for (size_t i = 0; i < servers.size(); ++i) {
 401       if (servers[i]->service_.request_count() == 1) {
 402         // Was the server index known? If not, update connection_order.
 403         const auto it =
 404             std::find(connection_order->begin(), connection_order->end(), i);
 405         if (it == connection_order->end()) {
 406           connection_order->push_back(i);
 407           return;
 408         }
 409       }
 410     }
 411   }
 412
 413   const char* ValidServiceConfigV1() { return "{\"version\": \"1\"}"; }
 414
 415   const char* ValidServiceConfigV2() { return "{\"version\": \"2\"}"; }
 416
 417   const char* ValidDefaultServiceConfig() {
 418     return "{\"version\": \"valid_default\"}";
 419   }
 420
 421   const char* InvalidDefaultServiceConfig() {
 422     return "{\"version\": \"invalid_default\"";
 423   }
 424
 425   const grpc::string server_host_;
 426   std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
 427   std::vector<std::unique_ptr<ServerData>> servers_;
 428   grpc_core::RefCountedPtr<grpc_core::FakeResolverResponseGenerator>
 429       response_generator_;
 430   const grpc::string kRequestMessage_;
 431   std::shared_ptr<ChannelCredentials> creds_;
 432 };
 433
 434 TEST_F(ServiceConfigEnd2endTest, NoServiceConfigTest) {
 435   StartServers(1);
 436   auto channel = BuildChannel();
 437   auto stub = BuildStub(channel);
 438   SetNextResolutionNoServiceConfig(GetServersPorts());
 439   CheckRpcSendOk(stub, DEBUG_LOCATION);
 440   EXPECT_STREQ("", channel->GetServiceConfigJSON().c_str());
 441 }
 442
 443 TEST_F(ServiceConfigEnd2endTest, NoServiceConfigWithDefaultConfigTest) {
 444   StartServers(1);
 445   auto channel = BuildChannelWithDefaultServiceConfig();
 446   auto stub = BuildStub(channel);
 447   SetNextResolutionNoServiceConfig(GetServersPorts());
 448   CheckRpcSendOk(stub, DEBUG_LOCATION);
 449   EXPECT_STREQ(ValidDefaultServiceConfig(),
 450                channel->GetServiceConfigJSON().c_str());
 451 }
 452
 453 TEST_F(ServiceConfigEnd2endTest, InvalidServiceConfigTest) {
 454   StartServers(1);
 455   auto channel = BuildChannel();
 456   auto stub = BuildStub(channel);
 457   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 458   CheckRpcSendFailure(stub);
 459 }
 460
 461 TEST_F(ServiceConfigEnd2endTest, InvalidServiceConfigWithDefaultConfigTest) {
 462   StartServers(1);
 463   auto channel = BuildChannelWithDefaultServiceConfig();
 464   auto stub = BuildStub(channel);
 465   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 466   CheckRpcSendOk(stub, DEBUG_LOCATION);
 467   EXPECT_STREQ(ValidDefaultServiceConfig(),
 468                channel->GetServiceConfigJSON().c_str());
 469 }
 470
 471 TEST_F(ServiceConfigEnd2endTest, ValidServiceConfigUpdatesTest) {
 472   StartServers(1);
 473   auto channel = BuildChannel();
 474   auto stub = BuildStub(channel);
 475   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV1());
 476   CheckRpcSendOk(stub, DEBUG_LOCATION);
 477   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 478   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV2());
 479   CheckRpcSendOk(stub, DEBUG_LOCATION);
 480   EXPECT_STREQ(ValidServiceConfigV2(), channel->GetServiceConfigJSON().c_str());
 481 }
 482
 483 TEST_F(ServiceConfigEnd2endTest,
 484        NoServiceConfigUpdateAfterValidServiceConfigTest) {
 485   StartServers(1);
 486   auto channel = BuildChannel();
 487   auto stub = BuildStub(channel);
 488   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV1());
 489   CheckRpcSendOk(stub, DEBUG_LOCATION);
 490   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 491   SetNextResolutionNoServiceConfig(GetServersPorts());
 492   CheckRpcSendOk(stub, DEBUG_LOCATION);
 493   EXPECT_STREQ("", channel->GetServiceConfigJSON().c_str());
 494 }
 495
 496 TEST_F(ServiceConfigEnd2endTest,
 497        NoServiceConfigUpdateAfterValidServiceConfigWithDefaultConfigTest) {
 498   StartServers(1);
 499   auto channel = BuildChannelWithDefaultServiceConfig();
 500   auto stub = BuildStub(channel);
 501   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV1());
 502   CheckRpcSendOk(stub, DEBUG_LOCATION);
 503   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 504   SetNextResolutionNoServiceConfig(GetServersPorts());
 505   CheckRpcSendOk(stub, DEBUG_LOCATION);
 506   EXPECT_STREQ(ValidDefaultServiceConfig(),
 507                channel->GetServiceConfigJSON().c_str());
 508 }
 509
 510 TEST_F(ServiceConfigEnd2endTest,
 511        InvalidServiceConfigUpdateAfterValidServiceConfigTest) {
 512   StartServers(1);
 513   auto channel = BuildChannel();
 514   auto stub = BuildStub(channel);
 515   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV1());
 516   CheckRpcSendOk(stub, DEBUG_LOCATION);
 517   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 518   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 519   CheckRpcSendOk(stub, DEBUG_LOCATION);
 520   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 521 }
 522
 523 TEST_F(ServiceConfigEnd2endTest,
 524        InvalidServiceConfigUpdateAfterValidServiceConfigWithDefaultConfigTest) {
 525   StartServers(1);
 526   auto channel = BuildChannelWithDefaultServiceConfig();
 527   auto stub = BuildStub(channel);
 528   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV1());
 529   CheckRpcSendOk(stub, DEBUG_LOCATION);
 530   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 531   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 532   CheckRpcSendOk(stub, DEBUG_LOCATION);
 533   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 534 }
 535
 536 TEST_F(ServiceConfigEnd2endTest,
 537        ValidServiceConfigAfterInvalidServiceConfigTest) {
 538   StartServers(1);
 539   auto channel = BuildChannel();
 540   auto stub = BuildStub(channel);
 541   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 542   CheckRpcSendFailure(stub);
 543   SetNextResolutionValidServiceConfig(GetServersPorts());
 544   CheckRpcSendOk(stub, DEBUG_LOCATION);
 545 }
 546
 547 TEST_F(ServiceConfigEnd2endTest, NoServiceConfigAfterInvalidServiceConfigTest) {
 548   StartServers(1);
 549   auto channel = BuildChannel();
 550   auto stub = BuildStub(channel);
 551   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 552   CheckRpcSendFailure(stub);
 553   SetNextResolutionNoServiceConfig(GetServersPorts());
 554   CheckRpcSendOk(stub, DEBUG_LOCATION);
 555   EXPECT_STREQ("", channel->GetServiceConfigJSON().c_str());
 556 }
 557
 558 TEST_F(ServiceConfigEnd2endTest,
 559        AnotherInvalidServiceConfigAfterInvalidServiceConfigTest) {
 560   StartServers(1);
 561   auto channel = BuildChannel();
 562   auto stub = BuildStub(channel);
 563   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 564   CheckRpcSendFailure(stub);
 565   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 566   CheckRpcSendFailure(stub);
 567 }
 568
 569 TEST_F(ServiceConfigEnd2endTest, InvalidDefaultServiceConfigTest) {
 570   StartServers(1);
 571   auto channel = BuildChannelWithInvalidDefaultServiceConfig();
 572   auto stub = BuildStub(channel);
 573   // An invalid default service config results in a lame channel which fails all
 574   // RPCs
 575   CheckRpcSendFailure(stub);
 576 }
 577
 578 TEST_F(ServiceConfigEnd2endTest,
 579        InvalidDefaultServiceConfigTestWithValidServiceConfig) {
 580   StartServers(1);
 581   auto channel = BuildChannelWithInvalidDefaultServiceConfig();
 582   auto stub = BuildStub(channel);
 583   CheckRpcSendFailure(stub);
 584   // An invalid default service config results in a lame channel which fails all
 585   // RPCs
 586   SetNextResolutionValidServiceConfig(GetServersPorts());
 587   CheckRpcSendFailure(stub);
 588 }
 589
 590 TEST_F(ServiceConfigEnd2endTest,
 591        InvalidDefaultServiceConfigTestWithInvalidServiceConfig) {
 592   StartServers(1);
 593   auto channel = BuildChannelWithInvalidDefaultServiceConfig();
 594   auto stub = BuildStub(channel);
 595   CheckRpcSendFailure(stub);
 596   // An invalid default service config results in a lame channel which fails all
 597   // RPCs
 598   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 599   CheckRpcSendFailure(stub);
 600 }
 601
 602 TEST_F(ServiceConfigEnd2endTest,
 603        InvalidDefaultServiceConfigTestWithNoServiceConfig) {
 604   StartServers(1);
 605   auto channel = BuildChannelWithInvalidDefaultServiceConfig();
 606   auto stub = BuildStub(channel);
 607   CheckRpcSendFailure(stub);
 608   // An invalid default service config results in a lame channel which fails all
 609   // RPCs
 610   SetNextResolutionNoServiceConfig(GetServersPorts());
 611   CheckRpcSendFailure(stub);
 612 }
 613
 614 }  // namespace
 615 }  // namespace testing
 616 }  // namespace grpc
 617
 618 int main(int argc, char** argv) {
 619   ::testing::InitGoogleTest(&argc, argv);
 620   grpc::testing::TestEnvironment env(argc, argv);
 621   const auto result = RUN_ALL_TESTS();
 622   return result;
 623 }