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(
 249         grpc::experimental::ValidateServiceConfigJSON(
 250             InvalidDefaultServiceConfig()),
 251         ::testing::HasSubstr("failed to parse JSON for service config"));
 252     args.SetServiceConfigJSON(InvalidDefaultServiceConfig());
 253     args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR,
 254                     response_generator_.get());
 255     return ::grpc::CreateCustomChannel("fake:///", creds_, args);
 256   }
 257
 258   bool SendRpc(
 259       const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub,
 260       EchoResponse* response = nullptr, int timeout_ms = 1000,
 261       Status* result = nullptr, bool wait_for_ready = false) {
 262     const bool local_response = (response == nullptr);
 263     if (local_response) response = new EchoResponse;
 264     EchoRequest request;
 265     request.set_message(kRequestMessage_);
 266     ClientContext context;
 267     context.set_deadline(grpc_timeout_milliseconds_to_deadline(timeout_ms));
 268     if (wait_for_ready) context.set_wait_for_ready(true);
 269     Status status = stub->Echo(&context, request, response);
 270     if (result != nullptr) *result = status;
 271     if (local_response) delete response;
 272     return status.ok();
 273   }
 274
 275   void CheckRpcSendOk(
 276       const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub,
 277       const grpc_core::DebugLocation& location, bool wait_for_ready = false) {
 278     EchoResponse response;
 279     Status status;
 280     const bool success =
 281         SendRpc(stub, &response, 2000, &status, wait_for_ready);
 282     ASSERT_TRUE(success) << "From " << location.file() << ":" << location.line()
 283                          << "\n"
 284                          << "Error: " << status.error_message() << " "
 285                          << status.error_details();
 286     ASSERT_EQ(response.message(), kRequestMessage_)
 287         << "From " << location.file() << ":" << location.line();
 288     if (!success) abort();
 289   }
 290
 291   void CheckRpcSendFailure(
 292       const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub) {
 293     const bool success = SendRpc(stub);
 294     EXPECT_FALSE(success);
 295   }
 296
 297   struct ServerData {
 298     int port_;
 299     std::unique_ptr<Server> server_;
 300     MyTestServiceImpl service_;
 301     std::unique_ptr<std::thread> thread_;
 302     bool server_ready_ = false;
 303     bool started_ = false;
 304
 305     explicit ServerData(int port = 0) {
 306       port_ = port > 0 ? port : grpc_pick_unused_port_or_die();
 307     }
 308
 309     void Start(const grpc::string& server_host) {
 310       gpr_log(GPR_INFO, "starting server on port %d", port_);
 311       started_ = true;
 312       grpc::internal::Mutex mu;
 313       grpc::internal::MutexLock lock(&mu);
 314       grpc::internal::CondVar cond;
 315       thread_.reset(new std::thread(
 316           std::bind(&ServerData::Serve, this, server_host, &mu, &cond)));
 317       cond.WaitUntil(&mu, [this] { return server_ready_; });
 318       server_ready_ = false;
 319       gpr_log(GPR_INFO, "server startup complete");
 320     }
 321
 322     void Serve(const grpc::string& server_host, grpc::internal::Mutex* mu,
 323                grpc::internal::CondVar* cond) {
 324       std::ostringstream server_address;
 325       server_address << server_host << ":" << port_;
 326       ServerBuilder builder;
 327       std::shared_ptr<ServerCredentials> creds(new SecureServerCredentials(
 328           grpc_fake_transport_security_server_credentials_create()));
 329       builder.AddListeningPort(server_address.str(), std::move(creds));
 330       builder.RegisterService(&service_);
 331       server_ = builder.BuildAndStart();
 332       grpc::internal::MutexLock lock(mu);
 333       server_ready_ = true;
 334       cond->Signal();
 335     }
 336
 337     void Shutdown() {
 338       if (!started_) return;
 339       server_->Shutdown(grpc_timeout_milliseconds_to_deadline(0));
 340       thread_->join();
 341       started_ = false;
 342     }
 343
 344     void SetServingStatus(const grpc::string& service, bool serving) {
 345       server_->GetHealthCheckService()->SetServingStatus(service, serving);
 346     }
 347   };
 348
 349   void ResetCounters() {
 350     for (const auto& server : servers_) server->service_.ResetCounters();
 351   }
 352
 353   void WaitForServer(
 354       const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub,
 355       size_t server_idx, const grpc_core::DebugLocation& location,
 356       bool ignore_failure = false) {
 357     do {
 358       if (ignore_failure) {
 359         SendRpc(stub);
 360       } else {
 361         CheckRpcSendOk(stub, location, true);
 362       }
 363     } while (servers_[server_idx]->service_.request_count() == 0);
 364     ResetCounters();
 365   }
 366
 367   bool WaitForChannelNotReady(Channel* channel, int timeout_seconds = 5) {
 368     const gpr_timespec deadline =
 369         grpc_timeout_seconds_to_deadline(timeout_seconds);
 370     grpc_connectivity_state state;
 371     while ((state = channel->GetState(false /* try_to_connect */)) ==
 372            GRPC_CHANNEL_READY) {
 373       if (!channel->WaitForStateChange(state, deadline)) return false;
 374     }
 375     return true;
 376   }
 377
 378   bool WaitForChannelReady(Channel* channel, int timeout_seconds = 5) {
 379     const gpr_timespec deadline =
 380         grpc_timeout_seconds_to_deadline(timeout_seconds);
 381     grpc_connectivity_state state;
 382     while ((state = channel->GetState(true /* try_to_connect */)) !=
 383            GRPC_CHANNEL_READY) {
 384       if (!channel->WaitForStateChange(state, deadline)) return false;
 385     }
 386     return true;
 387   }
 388
 389   bool SeenAllServers() {
 390     for (const auto& server : servers_) {
 391       if (server->service_.request_count() == 0) return false;
 392     }
 393     return true;
 394   }
 395
 396   // Updates \a connection_order by appending to it the index of the newly
 397   // connected server. Must be called after every single RPC.
 398   void UpdateConnectionOrder(
 399       const std::vector<std::unique_ptr<ServerData>>& servers,
 400       std::vector<int>* connection_order) {
 401     for (size_t i = 0; i < servers.size(); ++i) {
 402       if (servers[i]->service_.request_count() == 1) {
 403         // Was the server index known? If not, update connection_order.
 404         const auto it =
 405             std::find(connection_order->begin(), connection_order->end(), i);
 406         if (it == connection_order->end()) {
 407           connection_order->push_back(i);
 408           return;
 409         }
 410       }
 411     }
 412   }
 413
 414   const char* ValidServiceConfigV1() { return "{\"version\": \"1\"}"; }
 415
 416   const char* ValidServiceConfigV2() { return "{\"version\": \"2\"}"; }
 417
 418   const char* ValidDefaultServiceConfig() {
 419     return "{\"version\": \"valid_default\"}";
 420   }
 421
 422   const char* InvalidDefaultServiceConfig() {
 423     return "{\"version\": \"invalid_default\"";
 424   }
 425
 426   const grpc::string server_host_;
 427   std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
 428   std::vector<std::unique_ptr<ServerData>> servers_;
 429   grpc_core::RefCountedPtr<grpc_core::FakeResolverResponseGenerator>
 430       response_generator_;
 431   const grpc::string kRequestMessage_;
 432   std::shared_ptr<ChannelCredentials> creds_;
 433 };
 434
 435 TEST_F(ServiceConfigEnd2endTest, NoServiceConfigTest) {
 436   StartServers(1);
 437   auto channel = BuildChannel();
 438   auto stub = BuildStub(channel);
 439   SetNextResolutionNoServiceConfig(GetServersPorts());
 440   CheckRpcSendOk(stub, DEBUG_LOCATION);
 441   EXPECT_STREQ("", channel->GetServiceConfigJSON().c_str());
 442 }
 443
 444 TEST_F(ServiceConfigEnd2endTest, NoServiceConfigWithDefaultConfigTest) {
 445   StartServers(1);
 446   auto channel = BuildChannelWithDefaultServiceConfig();
 447   auto stub = BuildStub(channel);
 448   SetNextResolutionNoServiceConfig(GetServersPorts());
 449   CheckRpcSendOk(stub, DEBUG_LOCATION);
 450   EXPECT_STREQ(ValidDefaultServiceConfig(),
 451                channel->GetServiceConfigJSON().c_str());
 452 }
 453
 454 TEST_F(ServiceConfigEnd2endTest, InvalidServiceConfigTest) {
 455   StartServers(1);
 456   auto channel = BuildChannel();
 457   auto stub = BuildStub(channel);
 458   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 459   CheckRpcSendFailure(stub);
 460 }
 461
 462 TEST_F(ServiceConfigEnd2endTest, InvalidServiceConfigWithDefaultConfigTest) {
 463   StartServers(1);
 464   auto channel = BuildChannelWithDefaultServiceConfig();
 465   auto stub = BuildStub(channel);
 466   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 467   CheckRpcSendOk(stub, DEBUG_LOCATION);
 468   EXPECT_STREQ(ValidDefaultServiceConfig(),
 469                channel->GetServiceConfigJSON().c_str());
 470 }
 471
 472 TEST_F(ServiceConfigEnd2endTest, ValidServiceConfigUpdatesTest) {
 473   StartServers(1);
 474   auto channel = BuildChannel();
 475   auto stub = BuildStub(channel);
 476   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV1());
 477   CheckRpcSendOk(stub, DEBUG_LOCATION);
 478   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 479   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV2());
 480   CheckRpcSendOk(stub, DEBUG_LOCATION);
 481   EXPECT_STREQ(ValidServiceConfigV2(), channel->GetServiceConfigJSON().c_str());
 482 }
 483
 484 TEST_F(ServiceConfigEnd2endTest,
 485        NoServiceConfigUpdateAfterValidServiceConfigTest) {
 486   StartServers(1);
 487   auto channel = BuildChannel();
 488   auto stub = BuildStub(channel);
 489   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV1());
 490   CheckRpcSendOk(stub, DEBUG_LOCATION);
 491   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 492   SetNextResolutionNoServiceConfig(GetServersPorts());
 493   CheckRpcSendOk(stub, DEBUG_LOCATION);
 494   EXPECT_STREQ("", channel->GetServiceConfigJSON().c_str());
 495 }
 496
 497 TEST_F(ServiceConfigEnd2endTest,
 498        NoServiceConfigUpdateAfterValidServiceConfigWithDefaultConfigTest) {
 499   StartServers(1);
 500   auto channel = BuildChannelWithDefaultServiceConfig();
 501   auto stub = BuildStub(channel);
 502   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV1());
 503   CheckRpcSendOk(stub, DEBUG_LOCATION);
 504   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 505   SetNextResolutionNoServiceConfig(GetServersPorts());
 506   CheckRpcSendOk(stub, DEBUG_LOCATION);
 507   EXPECT_STREQ(ValidDefaultServiceConfig(),
 508                channel->GetServiceConfigJSON().c_str());
 509 }
 510
 511 TEST_F(ServiceConfigEnd2endTest,
 512        InvalidServiceConfigUpdateAfterValidServiceConfigTest) {
 513   StartServers(1);
 514   auto channel = BuildChannel();
 515   auto stub = BuildStub(channel);
 516   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV1());
 517   CheckRpcSendOk(stub, DEBUG_LOCATION);
 518   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 519   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 520   CheckRpcSendOk(stub, DEBUG_LOCATION);
 521   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 522 }
 523
 524 TEST_F(ServiceConfigEnd2endTest,
 525        InvalidServiceConfigUpdateAfterValidServiceConfigWithDefaultConfigTest) {
 526   StartServers(1);
 527   auto channel = BuildChannelWithDefaultServiceConfig();
 528   auto stub = BuildStub(channel);
 529   SetNextResolutionWithServiceConfig(GetServersPorts(), ValidServiceConfigV1());
 530   CheckRpcSendOk(stub, DEBUG_LOCATION);
 531   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 532   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 533   CheckRpcSendOk(stub, DEBUG_LOCATION);
 534   EXPECT_STREQ(ValidServiceConfigV1(), channel->GetServiceConfigJSON().c_str());
 535 }
 536
 537 TEST_F(ServiceConfigEnd2endTest,
 538        ValidServiceConfigAfterInvalidServiceConfigTest) {
 539   StartServers(1);
 540   auto channel = BuildChannel();
 541   auto stub = BuildStub(channel);
 542   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 543   CheckRpcSendFailure(stub);
 544   SetNextResolutionValidServiceConfig(GetServersPorts());
 545   CheckRpcSendOk(stub, DEBUG_LOCATION);
 546 }
 547
 548 TEST_F(ServiceConfigEnd2endTest, NoServiceConfigAfterInvalidServiceConfigTest) {
 549   StartServers(1);
 550   auto channel = BuildChannel();
 551   auto stub = BuildStub(channel);
 552   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 553   CheckRpcSendFailure(stub);
 554   SetNextResolutionNoServiceConfig(GetServersPorts());
 555   CheckRpcSendOk(stub, DEBUG_LOCATION);
 556   EXPECT_STREQ("", channel->GetServiceConfigJSON().c_str());
 557 }
 558
 559 TEST_F(ServiceConfigEnd2endTest,
 560        AnotherInvalidServiceConfigAfterInvalidServiceConfigTest) {
 561   StartServers(1);
 562   auto channel = BuildChannel();
 563   auto stub = BuildStub(channel);
 564   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 565   CheckRpcSendFailure(stub);
 566   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 567   CheckRpcSendFailure(stub);
 568 }
 569
 570 TEST_F(ServiceConfigEnd2endTest, InvalidDefaultServiceConfigTest) {
 571   StartServers(1);
 572   auto channel = BuildChannelWithInvalidDefaultServiceConfig();
 573   auto stub = BuildStub(channel);
 574   // An invalid default service config results in a lame channel which fails all
 575   // RPCs
 576   CheckRpcSendFailure(stub);
 577 }
 578
 579 TEST_F(ServiceConfigEnd2endTest,
 580        InvalidDefaultServiceConfigTestWithValidServiceConfig) {
 581   StartServers(1);
 582   auto channel = BuildChannelWithInvalidDefaultServiceConfig();
 583   auto stub = BuildStub(channel);
 584   CheckRpcSendFailure(stub);
 585   // An invalid default service config results in a lame channel which fails all
 586   // RPCs
 587   SetNextResolutionValidServiceConfig(GetServersPorts());
 588   CheckRpcSendFailure(stub);
 589 }
 590
 591 TEST_F(ServiceConfigEnd2endTest,
 592        InvalidDefaultServiceConfigTestWithInvalidServiceConfig) {
 593   StartServers(1);
 594   auto channel = BuildChannelWithInvalidDefaultServiceConfig();
 595   auto stub = BuildStub(channel);
 596   CheckRpcSendFailure(stub);
 597   // An invalid default service config results in a lame channel which fails all
 598   // RPCs
 599   SetNextResolutionInvalidServiceConfig(GetServersPorts());
 600   CheckRpcSendFailure(stub);
 601 }
 602
 603 TEST_F(ServiceConfigEnd2endTest,
 604        InvalidDefaultServiceConfigTestWithNoServiceConfig) {
 605   StartServers(1);
 606   auto channel = BuildChannelWithInvalidDefaultServiceConfig();
 607   auto stub = BuildStub(channel);
 608   CheckRpcSendFailure(stub);
 609   // An invalid default service config results in a lame channel which fails all
 610   // RPCs
 611   SetNextResolutionNoServiceConfig(GetServersPorts());
 612   CheckRpcSendFailure(stub);
 613 }
 614
 615 }  // namespace
 616 }  // namespace testing
 617 }  // namespace grpc
 618
 619 int main(int argc, char** argv) {
 620   ::testing::InitGoogleTest(&argc, argv);
 621   grpc::testing::TestEnvironment env(argc, argv);
 622   const auto result = RUN_ALL_TESTS();
 623   return result;
 624 }