| 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169 | /* * * Copyright 2018 gRPC authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *     http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */#include <memory>#include <vector>#include <grpcpp/channel.h>#include <grpcpp/client_context.h>#include <grpcpp/create_channel.h>#include <grpcpp/generic/generic_stub.h>#include <grpcpp/impl/codegen/proto_utils.h>#include <grpcpp/server.h>#include <grpcpp/server_builder.h>#include <grpcpp/server_context.h>#include <grpcpp/support/client_interceptor.h>#include "absl/memory/memory.h"#include "src/proto/grpc/testing/echo.grpc.pb.h"#include "test/core/util/port.h"#include "test/core/util/test_config.h"#include "test/cpp/end2end/interceptors_util.h"#include "test/cpp/end2end/test_service_impl.h"#include "test/cpp/util/byte_buffer_proto_helper.h"#include "test/cpp/util/string_ref_helper.h"#include <gtest/gtest.h>namespace grpc {namespace testing {namespace {enum class RPCType {  kSyncUnary,  kSyncClientStreaming,  kSyncServerStreaming,  kSyncBidiStreaming,  kAsyncCQUnary,  kAsyncCQClientStreaming,  kAsyncCQServerStreaming,  kAsyncCQBidiStreaming,};/* Hijacks Echo RPC and fills in the expected values */class HijackingInterceptor : public experimental::Interceptor { public:  HijackingInterceptor(experimental::ClientRpcInfo* info) {    info_ = info;    // Make sure it is the right method    EXPECT_EQ(strcmp("/grpc.testing.EchoTestService/Echo", info->method()), 0);    EXPECT_EQ(info->type(), experimental::ClientRpcInfo::Type::UNARY);  }  void Intercept(experimental::InterceptorBatchMethods* methods) override {    bool hijack = false;    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_INITIAL_METADATA)) {      auto* map = methods->GetSendInitialMetadata();      // Check that we can see the test metadata      ASSERT_EQ(map->size(), static_cast<unsigned>(1));      auto iterator = map->begin();      EXPECT_EQ("testkey", iterator->first);      EXPECT_EQ("testvalue", iterator->second);      hijack = true;    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_MESSAGE)) {      EchoRequest req;      auto* buffer = methods->GetSerializedSendMessage();      auto copied_buffer = *buffer;      EXPECT_TRUE(          SerializationTraits<EchoRequest>::Deserialize(&copied_buffer, &req)              .ok());      EXPECT_EQ(req.message(), "Hello");    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_CLOSE)) {      // Got nothing to do here for now    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_INITIAL_METADATA)) {      auto* map = methods->GetRecvInitialMetadata();      // Got nothing better to do here for now      EXPECT_EQ(map->size(), static_cast<unsigned>(0));    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_MESSAGE)) {      EchoResponse* resp =          static_cast<EchoResponse*>(methods->GetRecvMessage());      // Check that we got the hijacked message, and re-insert the expected      // message      EXPECT_EQ(resp->message(), "Hello1");      resp->set_message("Hello");    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_STATUS)) {      auto* map = methods->GetRecvTrailingMetadata();      bool found = false;      // Check that we received the metadata as an echo      for (const auto& pair : *map) {        found = pair.first.starts_with("testkey") &&                pair.second.starts_with("testvalue");        if (found) break;      }      EXPECT_EQ(found, true);      auto* status = methods->GetRecvStatus();      EXPECT_EQ(status->ok(), true);    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_RECV_INITIAL_METADATA)) {      auto* map = methods->GetRecvInitialMetadata();      // Got nothing better to do here at the moment      EXPECT_EQ(map->size(), static_cast<unsigned>(0));    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_RECV_MESSAGE)) {      // Insert a different message than expected      EchoResponse* resp =          static_cast<EchoResponse*>(methods->GetRecvMessage());      resp->set_message("Hello1");    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_RECV_STATUS)) {      auto* map = methods->GetRecvTrailingMetadata();      // insert the metadata that we want      EXPECT_EQ(map->size(), static_cast<unsigned>(0));      map->insert(std::make_pair("testkey", "testvalue"));      auto* status = methods->GetRecvStatus();      *status = Status(StatusCode::OK, "");    }    if (hijack) {      methods->Hijack();    } else {      methods->Proceed();    }  } private:  experimental::ClientRpcInfo* info_;};class HijackingInterceptorFactory    : public experimental::ClientInterceptorFactoryInterface { public:  experimental::Interceptor* CreateClientInterceptor(      experimental::ClientRpcInfo* info) override {    return new HijackingInterceptor(info);  }};class HijackingInterceptorMakesAnotherCall : public experimental::Interceptor { public:  HijackingInterceptorMakesAnotherCall(experimental::ClientRpcInfo* info) {    info_ = info;    // Make sure it is the right method    EXPECT_EQ(strcmp("/grpc.testing.EchoTestService/Echo", info->method()), 0);  }  void Intercept(experimental::InterceptorBatchMethods* methods) override {    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_INITIAL_METADATA)) {      auto* map = methods->GetSendInitialMetadata();      // Check that we can see the test metadata      ASSERT_EQ(map->size(), static_cast<unsigned>(1));      auto iterator = map->begin();      EXPECT_EQ("testkey", iterator->first);      EXPECT_EQ("testvalue", iterator->second);      // Make a copy of the map      metadata_map_ = *map;    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_MESSAGE)) {      EchoRequest req;      auto* buffer = methods->GetSerializedSendMessage();      auto copied_buffer = *buffer;      EXPECT_TRUE(          SerializationTraits<EchoRequest>::Deserialize(&copied_buffer, &req)              .ok());      EXPECT_EQ(req.message(), "Hello");      req_ = req;      stub_ = grpc::testing::EchoTestService::NewStub(          methods->GetInterceptedChannel());      ctx_.AddMetadata(metadata_map_.begin()->first,                       metadata_map_.begin()->second);      stub_->experimental_async()->Echo(&ctx_, &req_, &resp_,                                        [this, methods](Status s) {                                          EXPECT_EQ(s.ok(), true);                                          EXPECT_EQ(resp_.message(), "Hello");                                          methods->Hijack();                                        });      // This is a Unary RPC and we have got nothing interesting to do in the      // PRE_SEND_CLOSE interception hook point for this interceptor, so let's      // return here. (We do not want to call methods->Proceed(). When the new      // RPC returns, we will call methods->Hijack() instead.)      return;    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_CLOSE)) {      // Got nothing to do here for now    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_INITIAL_METADATA)) {      auto* map = methods->GetRecvInitialMetadata();      // Got nothing better to do here for now      EXPECT_EQ(map->size(), static_cast<unsigned>(0));    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_MESSAGE)) {      EchoResponse* resp =          static_cast<EchoResponse*>(methods->GetRecvMessage());      // Check that we got the hijacked message, and re-insert the expected      // message      EXPECT_EQ(resp->message(), "Hello");    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_STATUS)) {      auto* map = methods->GetRecvTrailingMetadata();      bool found = false;      // Check that we received the metadata as an echo      for (const auto& pair : *map) {        found = pair.first.starts_with("testkey") &&                pair.second.starts_with("testvalue");        if (found) break;      }      EXPECT_EQ(found, true);      auto* status = methods->GetRecvStatus();      EXPECT_EQ(status->ok(), true);    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_RECV_INITIAL_METADATA)) {      auto* map = methods->GetRecvInitialMetadata();      // Got nothing better to do here at the moment      EXPECT_EQ(map->size(), static_cast<unsigned>(0));    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_RECV_MESSAGE)) {      // Insert a different message than expected      EchoResponse* resp =          static_cast<EchoResponse*>(methods->GetRecvMessage());      resp->set_message(resp_.message());    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_RECV_STATUS)) {      auto* map = methods->GetRecvTrailingMetadata();      // insert the metadata that we want      EXPECT_EQ(map->size(), static_cast<unsigned>(0));      map->insert(std::make_pair("testkey", "testvalue"));      auto* status = methods->GetRecvStatus();      *status = Status(StatusCode::OK, "");    }    methods->Proceed();  } private:  experimental::ClientRpcInfo* info_;  std::multimap<std::string, std::string> metadata_map_;  ClientContext ctx_;  EchoRequest req_;  EchoResponse resp_;  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;};class HijackingInterceptorMakesAnotherCallFactory    : public experimental::ClientInterceptorFactoryInterface { public:  experimental::Interceptor* CreateClientInterceptor(      experimental::ClientRpcInfo* info) override {    return new HijackingInterceptorMakesAnotherCall(info);  }};class BidiStreamingRpcHijackingInterceptor : public experimental::Interceptor { public:  BidiStreamingRpcHijackingInterceptor(experimental::ClientRpcInfo* info) {    info_ = info;  }  void Intercept(experimental::InterceptorBatchMethods* methods) override {    bool hijack = false;    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_INITIAL_METADATA)) {      CheckMetadata(*methods->GetSendInitialMetadata(), "testkey", "testvalue");      hijack = true;    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_MESSAGE)) {      EchoRequest req;      auto* buffer = methods->GetSerializedSendMessage();      auto copied_buffer = *buffer;      EXPECT_TRUE(          SerializationTraits<EchoRequest>::Deserialize(&copied_buffer, &req)              .ok());      EXPECT_EQ(req.message().find("Hello"), 0u);      msg = req.message();    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_CLOSE)) {      // Got nothing to do here for now    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_STATUS)) {      CheckMetadata(*methods->GetRecvTrailingMetadata(), "testkey",                    "testvalue");      auto* status = methods->GetRecvStatus();      EXPECT_EQ(status->ok(), true);    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_RECV_MESSAGE)) {      EchoResponse* resp =          static_cast<EchoResponse*>(methods->GetRecvMessage());      resp->set_message(msg);    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_MESSAGE)) {      EXPECT_EQ(static_cast<EchoResponse*>(methods->GetRecvMessage())                    ->message()                    .find("Hello"),                0u);    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_RECV_STATUS)) {      auto* map = methods->GetRecvTrailingMetadata();      // insert the metadata that we want      EXPECT_EQ(map->size(), static_cast<unsigned>(0));      map->insert(std::make_pair("testkey", "testvalue"));      auto* status = methods->GetRecvStatus();      *status = Status(StatusCode::OK, "");    }    if (hijack) {      methods->Hijack();    } else {      methods->Proceed();    }  } private:  experimental::ClientRpcInfo* info_;  std::string msg;};class ClientStreamingRpcHijackingInterceptor    : public experimental::Interceptor { public:  ClientStreamingRpcHijackingInterceptor(experimental::ClientRpcInfo* info) {    info_ = info;  }  void Intercept(experimental::InterceptorBatchMethods* methods) override {    bool hijack = false;    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_INITIAL_METADATA)) {      hijack = true;    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_MESSAGE)) {      if (++count_ > 10) {        methods->FailHijackedSendMessage();      }    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_SEND_MESSAGE)) {      EXPECT_FALSE(got_failed_send_);      got_failed_send_ = !methods->GetSendMessageStatus();    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_RECV_STATUS)) {      auto* status = methods->GetRecvStatus();      *status = Status(StatusCode::UNAVAILABLE, "Done sending 10 messages");    }    if (hijack) {      methods->Hijack();    } else {      methods->Proceed();    }  }  static bool GotFailedSend() { return got_failed_send_; } private:  experimental::ClientRpcInfo* info_;  int count_ = 0;  static bool got_failed_send_;};bool ClientStreamingRpcHijackingInterceptor::got_failed_send_ = false;class ClientStreamingRpcHijackingInterceptorFactory    : public experimental::ClientInterceptorFactoryInterface { public:  experimental::Interceptor* CreateClientInterceptor(      experimental::ClientRpcInfo* info) override {    return new ClientStreamingRpcHijackingInterceptor(info);  }};class ServerStreamingRpcHijackingInterceptor    : public experimental::Interceptor { public:  ServerStreamingRpcHijackingInterceptor(experimental::ClientRpcInfo* info) {    info_ = info;    got_failed_message_ = false;  }  void Intercept(experimental::InterceptorBatchMethods* methods) override {    bool hijack = false;    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_INITIAL_METADATA)) {      auto* map = methods->GetSendInitialMetadata();      // Check that we can see the test metadata      ASSERT_EQ(map->size(), static_cast<unsigned>(1));      auto iterator = map->begin();      EXPECT_EQ("testkey", iterator->first);      EXPECT_EQ("testvalue", iterator->second);      hijack = true;    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_MESSAGE)) {      EchoRequest req;      auto* buffer = methods->GetSerializedSendMessage();      auto copied_buffer = *buffer;      EXPECT_TRUE(          SerializationTraits<EchoRequest>::Deserialize(&copied_buffer, &req)              .ok());      EXPECT_EQ(req.message(), "Hello");    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_CLOSE)) {      // Got nothing to do here for now    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_STATUS)) {      auto* map = methods->GetRecvTrailingMetadata();      bool found = false;      // Check that we received the metadata as an echo      for (const auto& pair : *map) {        found = pair.first.starts_with("testkey") &&                pair.second.starts_with("testvalue");        if (found) break;      }      EXPECT_EQ(found, true);      auto* status = methods->GetRecvStatus();      EXPECT_EQ(status->ok(), true);    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_RECV_MESSAGE)) {      if (++count_ > 10) {        methods->FailHijackedRecvMessage();      }      EchoResponse* resp =          static_cast<EchoResponse*>(methods->GetRecvMessage());      resp->set_message("Hello");    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_MESSAGE)) {      // Only the last message will be a failure      EXPECT_FALSE(got_failed_message_);      got_failed_message_ = methods->GetRecvMessage() == nullptr;    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_RECV_STATUS)) {      auto* map = methods->GetRecvTrailingMetadata();      // insert the metadata that we want      EXPECT_EQ(map->size(), static_cast<unsigned>(0));      map->insert(std::make_pair("testkey", "testvalue"));      auto* status = methods->GetRecvStatus();      *status = Status(StatusCode::OK, "");    }    if (hijack) {      methods->Hijack();    } else {      methods->Proceed();    }  }  static bool GotFailedMessage() { return got_failed_message_; } private:  experimental::ClientRpcInfo* info_;  static bool got_failed_message_;  int count_ = 0;};bool ServerStreamingRpcHijackingInterceptor::got_failed_message_ = false;class ServerStreamingRpcHijackingInterceptorFactory    : public experimental::ClientInterceptorFactoryInterface { public:  experimental::Interceptor* CreateClientInterceptor(      experimental::ClientRpcInfo* info) override {    return new ServerStreamingRpcHijackingInterceptor(info);  }};class BidiStreamingRpcHijackingInterceptorFactory    : public experimental::ClientInterceptorFactoryInterface { public:  experimental::Interceptor* CreateClientInterceptor(      experimental::ClientRpcInfo* info) override {    return new BidiStreamingRpcHijackingInterceptor(info);  }};// The logging interceptor is for testing purposes only. It is used to verify// that all the appropriate hook points are invoked for an RPC. The counts are// reset each time a new object of LoggingInterceptor is created, so only a// single RPC should be made on the channel before calling the Verify methods.class LoggingInterceptor : public experimental::Interceptor { public:  LoggingInterceptor(experimental::ClientRpcInfo* /*info*/) {    pre_send_initial_metadata_ = false;    pre_send_message_count_ = 0;    pre_send_close_ = false;    post_recv_initial_metadata_ = false;    post_recv_message_count_ = 0;    post_recv_status_ = false;  }  void Intercept(experimental::InterceptorBatchMethods* methods) override {    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_INITIAL_METADATA)) {      auto* map = methods->GetSendInitialMetadata();      // Check that we can see the test metadata      ASSERT_EQ(map->size(), static_cast<unsigned>(1));      auto iterator = map->begin();      EXPECT_EQ("testkey", iterator->first);      EXPECT_EQ("testvalue", iterator->second);      ASSERT_FALSE(pre_send_initial_metadata_);      pre_send_initial_metadata_ = true;    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_MESSAGE)) {      EchoRequest req;      auto* send_msg = methods->GetSendMessage();      if (send_msg == nullptr) {        // We did not get the non-serialized form of the message. Get the        // serialized form.        auto* buffer = methods->GetSerializedSendMessage();        auto copied_buffer = *buffer;        EchoRequest req;        EXPECT_TRUE(            SerializationTraits<EchoRequest>::Deserialize(&copied_buffer, &req)                .ok());        EXPECT_EQ(req.message(), "Hello");      } else {        EXPECT_EQ(            static_cast<const EchoRequest*>(send_msg)->message().find("Hello"),            0u);      }      auto* buffer = methods->GetSerializedSendMessage();      auto copied_buffer = *buffer;      EXPECT_TRUE(          SerializationTraits<EchoRequest>::Deserialize(&copied_buffer, &req)              .ok());      EXPECT_TRUE(req.message().find("Hello") == 0u);      pre_send_message_count_++;    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::PRE_SEND_CLOSE)) {      // Got nothing to do here for now      pre_send_close_ = true;    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_INITIAL_METADATA)) {      auto* map = methods->GetRecvInitialMetadata();      // Got nothing better to do here for now      EXPECT_EQ(map->size(), static_cast<unsigned>(0));      post_recv_initial_metadata_ = true;    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_MESSAGE)) {      EchoResponse* resp =          static_cast<EchoResponse*>(methods->GetRecvMessage());      if (resp != nullptr) {        EXPECT_TRUE(resp->message().find("Hello") == 0u);        post_recv_message_count_++;      }    }    if (methods->QueryInterceptionHookPoint(            experimental::InterceptionHookPoints::POST_RECV_STATUS)) {      auto* map = methods->GetRecvTrailingMetadata();      bool found = false;      // Check that we received the metadata as an echo      for (const auto& pair : *map) {        found = pair.first.starts_with("testkey") &&                pair.second.starts_with("testvalue");        if (found) break;      }      EXPECT_EQ(found, true);      auto* status = methods->GetRecvStatus();      EXPECT_EQ(status->ok(), true);      post_recv_status_ = true;    }    methods->Proceed();  }  static void VerifyCall(RPCType type) {    switch (type) {      case RPCType::kSyncUnary:      case RPCType::kAsyncCQUnary:        VerifyUnaryCall();        break;      case RPCType::kSyncClientStreaming:      case RPCType::kAsyncCQClientStreaming:        VerifyClientStreamingCall();        break;      case RPCType::kSyncServerStreaming:      case RPCType::kAsyncCQServerStreaming:        VerifyServerStreamingCall();        break;      case RPCType::kSyncBidiStreaming:      case RPCType::kAsyncCQBidiStreaming:        VerifyBidiStreamingCall();        break;    }  }  static void VerifyCallCommon() {    EXPECT_TRUE(pre_send_initial_metadata_);    EXPECT_TRUE(pre_send_close_);    EXPECT_TRUE(post_recv_initial_metadata_);    EXPECT_TRUE(post_recv_status_);  }  static void VerifyUnaryCall() {    VerifyCallCommon();    EXPECT_EQ(pre_send_message_count_, 1);    EXPECT_EQ(post_recv_message_count_, 1);  }  static void VerifyClientStreamingCall() {    VerifyCallCommon();    EXPECT_EQ(pre_send_message_count_, kNumStreamingMessages);    EXPECT_EQ(post_recv_message_count_, 1);  }  static void VerifyServerStreamingCall() {    VerifyCallCommon();    EXPECT_EQ(pre_send_message_count_, 1);    EXPECT_EQ(post_recv_message_count_, kNumStreamingMessages);  }  static void VerifyBidiStreamingCall() {    VerifyCallCommon();    EXPECT_EQ(pre_send_message_count_, kNumStreamingMessages);    EXPECT_EQ(post_recv_message_count_, kNumStreamingMessages);  } private:  static bool pre_send_initial_metadata_;  static int pre_send_message_count_;  static bool pre_send_close_;  static bool post_recv_initial_metadata_;  static int post_recv_message_count_;  static bool post_recv_status_;};bool LoggingInterceptor::pre_send_initial_metadata_;int LoggingInterceptor::pre_send_message_count_;bool LoggingInterceptor::pre_send_close_;bool LoggingInterceptor::post_recv_initial_metadata_;int LoggingInterceptor::post_recv_message_count_;bool LoggingInterceptor::post_recv_status_;class LoggingInterceptorFactory    : public experimental::ClientInterceptorFactoryInterface { public:  experimental::Interceptor* CreateClientInterceptor(      experimental::ClientRpcInfo* info) override {    return new LoggingInterceptor(info);  }};class TestScenario { public:  explicit TestScenario(const RPCType& type) : type_(type) {}  RPCType type() const { return type_; } private:  RPCType type_;};std::vector<TestScenario> CreateTestScenarios() {  std::vector<TestScenario> scenarios;  scenarios.emplace_back(RPCType::kSyncUnary);  scenarios.emplace_back(RPCType::kSyncClientStreaming);  scenarios.emplace_back(RPCType::kSyncServerStreaming);  scenarios.emplace_back(RPCType::kSyncBidiStreaming);  scenarios.emplace_back(RPCType::kAsyncCQUnary);  scenarios.emplace_back(RPCType::kAsyncCQServerStreaming);  return scenarios;}class ParameterizedClientInterceptorsEnd2endTest    : public ::testing::TestWithParam<TestScenario> { protected:  ParameterizedClientInterceptorsEnd2endTest() {    int port = grpc_pick_unused_port_or_die();    ServerBuilder builder;    server_address_ = "localhost:" + std::to_string(port);    builder.AddListeningPort(server_address_, InsecureServerCredentials());    builder.RegisterService(&service_);    server_ = builder.BuildAndStart();  }  ~ParameterizedClientInterceptorsEnd2endTest() override {    server_->Shutdown();  }  void SendRPC(const std::shared_ptr<Channel>& channel) {    switch (GetParam().type()) {      case RPCType::kSyncUnary:        MakeCall(channel);        break;      case RPCType::kSyncClientStreaming:        MakeClientStreamingCall(channel);        break;      case RPCType::kSyncServerStreaming:        MakeServerStreamingCall(channel);        break;      case RPCType::kSyncBidiStreaming:        MakeBidiStreamingCall(channel);        break;      case RPCType::kAsyncCQUnary:        MakeAsyncCQCall(channel);        break;      case RPCType::kAsyncCQClientStreaming:        // TODO(yashykt) : Fill this out        break;      case RPCType::kAsyncCQServerStreaming:        MakeAsyncCQServerStreamingCall(channel);        break;      case RPCType::kAsyncCQBidiStreaming:        // TODO(yashykt) : Fill this out        break;    }  }  std::string server_address_;  EchoTestServiceStreamingImpl service_;  std::unique_ptr<Server> server_;};TEST_P(ParameterizedClientInterceptorsEnd2endTest,       ClientInterceptorLoggingTest) {  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(absl::make_unique<LoggingInterceptorFactory>());  // Add 20 dummy interceptors  for (auto i = 0; i < 20; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  SendRPC(channel);  LoggingInterceptor::VerifyCall(GetParam().type());  // Make sure all 20 dummy interceptors were run  EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 20);}INSTANTIATE_TEST_SUITE_P(ParameterizedClientInterceptorsEnd2end,                         ParameterizedClientInterceptorsEnd2endTest,                         ::testing::ValuesIn(CreateTestScenarios()));class ClientInterceptorsEnd2endTest    : public ::testing::TestWithParam<TestScenario> { protected:  ClientInterceptorsEnd2endTest() {    int port = grpc_pick_unused_port_or_die();    ServerBuilder builder;    server_address_ = "localhost:" + std::to_string(port);    builder.AddListeningPort(server_address_, InsecureServerCredentials());    builder.RegisterService(&service_);    server_ = builder.BuildAndStart();  }  ~ClientInterceptorsEnd2endTest() override { server_->Shutdown(); }  std::string server_address_;  TestServiceImpl service_;  std::unique_ptr<Server> server_;};TEST_F(ClientInterceptorsEnd2endTest,       LameChannelClientInterceptorHijackingTest) {  ChannelArguments args;  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(absl::make_unique<HijackingInterceptorFactory>());  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, nullptr, args, std::move(creators));  MakeCall(channel);}TEST_F(ClientInterceptorsEnd2endTest, ClientInterceptorHijackingTest) {  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  // Add 20 dummy interceptors before hijacking interceptor  creators.reserve(20);  for (auto i = 0; i < 20; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  creators.push_back(absl::make_unique<HijackingInterceptorFactory>());  // Add 20 dummy interceptors after hijacking interceptor  for (auto i = 0; i < 20; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  MakeCall(channel);  // Make sure only 20 dummy interceptors were run  EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 20);}TEST_F(ClientInterceptorsEnd2endTest, ClientInterceptorLogThenHijackTest) {  ChannelArguments args;  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(absl::make_unique<LoggingInterceptorFactory>());  creators.push_back(absl::make_unique<HijackingInterceptorFactory>());  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  MakeCall(channel);  LoggingInterceptor::VerifyUnaryCall();}TEST_F(ClientInterceptorsEnd2endTest,       ClientInterceptorHijackingMakesAnotherCallTest) {  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  // Add 5 dummy interceptors before hijacking interceptor  creators.reserve(5);  for (auto i = 0; i < 5; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  creators.push_back(      std::unique_ptr<experimental::ClientInterceptorFactoryInterface>(          new HijackingInterceptorMakesAnotherCallFactory()));  // Add 7 dummy interceptors after hijacking interceptor  for (auto i = 0; i < 7; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  auto channel = server_->experimental().InProcessChannelWithInterceptors(      args, std::move(creators));  MakeCall(channel);  // Make sure all interceptors were run once, since the hijacking interceptor  // makes an RPC on the intercepted channel  EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 12);}class ClientInterceptorsCallbackEnd2endTest : public ::testing::Test { protected:  ClientInterceptorsCallbackEnd2endTest() {    int port = grpc_pick_unused_port_or_die();    ServerBuilder builder;    server_address_ = "localhost:" + std::to_string(port);    builder.AddListeningPort(server_address_, InsecureServerCredentials());    builder.RegisterService(&service_);    server_ = builder.BuildAndStart();  }  ~ClientInterceptorsCallbackEnd2endTest() override { server_->Shutdown(); }  std::string server_address_;  TestServiceImpl service_;  std::unique_ptr<Server> server_;};TEST_F(ClientInterceptorsCallbackEnd2endTest,       ClientInterceptorLoggingTestWithCallback) {  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(absl::make_unique<LoggingInterceptorFactory>());  // Add 20 dummy interceptors  for (auto i = 0; i < 20; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  auto channel = server_->experimental().InProcessChannelWithInterceptors(      args, std::move(creators));  MakeCallbackCall(channel);  LoggingInterceptor::VerifyUnaryCall();  // Make sure all 20 dummy interceptors were run  EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 20);}TEST_F(ClientInterceptorsCallbackEnd2endTest,       ClientInterceptorFactoryAllowsNullptrReturn) {  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(absl::make_unique<LoggingInterceptorFactory>());  // Add 20 dummy interceptors and 20 null interceptors  for (auto i = 0; i < 20; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());    creators.push_back(absl::make_unique<NullInterceptorFactory>());  }  auto channel = server_->experimental().InProcessChannelWithInterceptors(      args, std::move(creators));  MakeCallbackCall(channel);  LoggingInterceptor::VerifyUnaryCall();  // Make sure all 20 dummy interceptors were run  EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 20);}class ClientInterceptorsStreamingEnd2endTest : public ::testing::Test { protected:  ClientInterceptorsStreamingEnd2endTest() {    int port = grpc_pick_unused_port_or_die();    ServerBuilder builder;    server_address_ = "localhost:" + std::to_string(port);    builder.AddListeningPort(server_address_, InsecureServerCredentials());    builder.RegisterService(&service_);    server_ = builder.BuildAndStart();  }  ~ClientInterceptorsStreamingEnd2endTest() override { server_->Shutdown(); }  std::string server_address_;  EchoTestServiceStreamingImpl service_;  std::unique_ptr<Server> server_;};TEST_F(ClientInterceptorsStreamingEnd2endTest, ClientStreamingTest) {  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(absl::make_unique<LoggingInterceptorFactory>());  // Add 20 dummy interceptors  for (auto i = 0; i < 20; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  MakeClientStreamingCall(channel);  LoggingInterceptor::VerifyClientStreamingCall();  // Make sure all 20 dummy interceptors were run  EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 20);}TEST_F(ClientInterceptorsStreamingEnd2endTest, ServerStreamingTest) {  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(absl::make_unique<LoggingInterceptorFactory>());  // Add 20 dummy interceptors  for (auto i = 0; i < 20; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  MakeServerStreamingCall(channel);  LoggingInterceptor::VerifyServerStreamingCall();  // Make sure all 20 dummy interceptors were run  EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 20);}TEST_F(ClientInterceptorsStreamingEnd2endTest, ClientStreamingHijackingTest) {  ChannelArguments args;  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(      absl::make_unique<ClientStreamingRpcHijackingInterceptorFactory>());  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  auto stub = grpc::testing::EchoTestService::NewStub(channel);  ClientContext ctx;  EchoRequest req;  EchoResponse resp;  req.mutable_param()->set_echo_metadata(true);  req.set_message("Hello");  string expected_resp = "";  auto writer = stub->RequestStream(&ctx, &resp);  for (int i = 0; i < 10; i++) {    EXPECT_TRUE(writer->Write(req));    expected_resp += "Hello";  }  // The interceptor will reject the 11th message  writer->Write(req);  Status s = writer->Finish();  EXPECT_EQ(s.ok(), false);  EXPECT_TRUE(ClientStreamingRpcHijackingInterceptor::GotFailedSend());}TEST_F(ClientInterceptorsStreamingEnd2endTest, ServerStreamingHijackingTest) {  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(      absl::make_unique<ServerStreamingRpcHijackingInterceptorFactory>());  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  MakeServerStreamingCall(channel);  EXPECT_TRUE(ServerStreamingRpcHijackingInterceptor::GotFailedMessage());}TEST_F(ClientInterceptorsStreamingEnd2endTest,       AsyncCQServerStreamingHijackingTest) {  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(      absl::make_unique<ServerStreamingRpcHijackingInterceptorFactory>());  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  MakeAsyncCQServerStreamingCall(channel);  EXPECT_TRUE(ServerStreamingRpcHijackingInterceptor::GotFailedMessage());}TEST_F(ClientInterceptorsStreamingEnd2endTest, BidiStreamingHijackingTest) {  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(      absl::make_unique<BidiStreamingRpcHijackingInterceptorFactory>());  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  MakeBidiStreamingCall(channel);}TEST_F(ClientInterceptorsStreamingEnd2endTest, BidiStreamingTest) {  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  creators.push_back(absl::make_unique<LoggingInterceptorFactory>());  // Add 20 dummy interceptors  for (auto i = 0; i < 20; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  MakeBidiStreamingCall(channel);  LoggingInterceptor::VerifyBidiStreamingCall();  // Make sure all 20 dummy interceptors were run  EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 20);}class ClientGlobalInterceptorEnd2endTest : public ::testing::Test { protected:  ClientGlobalInterceptorEnd2endTest() {    int port = grpc_pick_unused_port_or_die();    ServerBuilder builder;    server_address_ = "localhost:" + std::to_string(port);    builder.AddListeningPort(server_address_, InsecureServerCredentials());    builder.RegisterService(&service_);    server_ = builder.BuildAndStart();  }  ~ClientGlobalInterceptorEnd2endTest() override { server_->Shutdown(); }  std::string server_address_;  TestServiceImpl service_;  std::unique_ptr<Server> server_;};TEST_F(ClientGlobalInterceptorEnd2endTest, DummyGlobalInterceptor) {  // We should ideally be registering a global interceptor only once per  // process, but for the purposes of testing, it should be fine to modify the  // registered global interceptor when there are no ongoing gRPC operations  DummyInterceptorFactory global_factory;  experimental::RegisterGlobalClientInterceptorFactory(&global_factory);  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  // Add 20 dummy interceptors  creators.reserve(20);  for (auto i = 0; i < 20; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  MakeCall(channel);  // Make sure all 20 dummy interceptors were run with the global interceptor  EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 21);  experimental::TestOnlyResetGlobalClientInterceptorFactory();}TEST_F(ClientGlobalInterceptorEnd2endTest, LoggingGlobalInterceptor) {  // We should ideally be registering a global interceptor only once per  // process, but for the purposes of testing, it should be fine to modify the  // registered global interceptor when there are no ongoing gRPC operations  LoggingInterceptorFactory global_factory;  experimental::RegisterGlobalClientInterceptorFactory(&global_factory);  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  // Add 20 dummy interceptors  creators.reserve(20);  for (auto i = 0; i < 20; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  MakeCall(channel);  LoggingInterceptor::VerifyUnaryCall();  // Make sure all 20 dummy interceptors were run  EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 20);  experimental::TestOnlyResetGlobalClientInterceptorFactory();}TEST_F(ClientGlobalInterceptorEnd2endTest, HijackingGlobalInterceptor) {  // We should ideally be registering a global interceptor only once per  // process, but for the purposes of testing, it should be fine to modify the  // registered global interceptor when there are no ongoing gRPC operations  HijackingInterceptorFactory global_factory;  experimental::RegisterGlobalClientInterceptorFactory(&global_factory);  ChannelArguments args;  DummyInterceptor::Reset();  std::vector<std::unique_ptr<experimental::ClientInterceptorFactoryInterface>>      creators;  // Add 20 dummy interceptors  creators.reserve(20);  for (auto i = 0; i < 20; i++) {    creators.push_back(absl::make_unique<DummyInterceptorFactory>());  }  auto channel = experimental::CreateCustomChannelWithInterceptors(      server_address_, InsecureChannelCredentials(), args, std::move(creators));  MakeCall(channel);  // Make sure all 20 dummy interceptors were run  EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 20);  experimental::TestOnlyResetGlobalClientInterceptorFactory();}}  // namespace}  // namespace testing}  // namespace grpcint main(int argc, char** argv) {  grpc::testing::TestEnvironment env(argc, argv);  ::testing::InitGoogleTest(&argc, argv);  return RUN_ALL_TESTS();}
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