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//
// Copyright 2022 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 <gmock/gmock.h>
#include <gtest/gtest.h>
#include "absl/strings/str_cat.h"
#include "absl/strings/str_format.h"
#include <grpcpp/create_channel.h>
#include <grpcpp/security/credentials.h>
#include <grpcpp/server_builder.h>
#include <grpcpp/support/status.h>
#include "src/core/lib/gprpp/host_port.h"
#include "test/core/util/port.h"
#include "test/core/util/test_config.h"
#include "test/cpp/interop/istio_echo_server_lib.h"
namespace grpc {
namespace testing {
namespace {
using proto::EchoRequest;
using proto::EchoResponse;
using proto::EchoTestService;
using proto::ForwardEchoRequest;
using proto::ForwardEchoResponse;
// A very simple EchoTestService implementation that just echoes back the
// message without handling any other expectations for ForwardEcho.
class SimpleEchoTestServerImpl : public proto::EchoTestService::Service {
public:
explicit SimpleEchoTestServerImpl() {}
grpc::Status Echo(grpc::ServerContext* /* context */,
const proto::EchoRequest* /* request */,
proto::EchoResponse* /* response */) override {
GPR_ASSERT(false);
return Status(StatusCode::INVALID_ARGUMENT, "Unexpected");
}
grpc::Status ForwardEcho(grpc::ServerContext* /*context*/,
const proto::ForwardEchoRequest* request,
proto::ForwardEchoResponse* response) override {
if (fail_rpc_) {
return Status(StatusCode::UNAVAILABLE, "fail rpc");
}
response->add_output(request->message());
return Status::OK;
}
void set_fail_rpc(bool fail_rpc) { fail_rpc_ = fail_rpc; }
private:
std::string hostname_;
std::string forwarding_address_;
std::atomic<bool> fail_rpc_{false};
// The following fields are not set yet. But we may need them later.
// int port_;
// std::string version_;
// std::string cluster_;
// std::string istio_version_;
};
class EchoTest : public ::testing::Test {
protected:
EchoTest() {
// Start the simple server which will handle protocols that
// EchoTestServiceImpl does not handle.
int forwarding_port = grpc_pick_unused_port_or_die();
forwarding_address_ = grpc_core::JoinHostPort("localhost", forwarding_port);
ServerBuilder simple_builder;
simple_builder.RegisterService(&simple_test_service_impl_);
simple_builder.AddListeningPort(forwarding_address_,
InsecureServerCredentials());
simple_server_ = simple_builder.BuildAndStart();
// Start the EchoTestServiceImpl server
ServerBuilder builder;
echo_test_service_impl_ = std::make_unique<EchoTestServiceImpl>(
"hostname", "v1", forwarding_address_);
builder.RegisterService(echo_test_service_impl_.get());
int port = grpc_pick_unused_port_or_die();
server_address_ = grpc_core::JoinHostPort("localhost", port);
builder.AddListeningPort(server_address_, InsecureServerCredentials());
server_ = builder.BuildAndStart();
auto channel = CreateChannel(server_address_, InsecureChannelCredentials());
stub_ = EchoTestService::NewStub(channel);
}
std::string forwarding_address_;
SimpleEchoTestServerImpl simple_test_service_impl_;
std::unique_ptr<EchoTestServiceImpl> echo_test_service_impl_;
std::string server_address_;
std::unique_ptr<Server> server_;
std::unique_ptr<Server> simple_server_;
std::unique_ptr<EchoTestService::Stub> stub_;
};
TEST_F(EchoTest, SimpleEchoTest) {
ClientContext context;
EchoRequest request;
EchoResponse response;
request.set_message("hello");
auto status = stub_->Echo(&context, request, &response);
ASSERT_TRUE(status.ok());
EXPECT_THAT(response.message(),
::testing::AllOf(::testing::HasSubstr("StatusCode=200\n"),
::testing::HasSubstr("Hostname=hostname\n"),
::testing::HasSubstr("Echo=hello\n"),
::testing::HasSubstr("Host="),
::testing::HasSubstr("IP="),
::testing::HasSubstr("ServiceVersion=v1")));
}
TEST_F(EchoTest, ForwardEchoTest) {
ClientContext context;
ForwardEchoRequest request;
ForwardEchoResponse response;
request.set_count(3);
request.set_qps(1);
request.set_timeout_micros(20 * 1000 * 1000); // 20 seconds
request.set_url(absl::StrCat("grpc://", server_address_));
request.set_message("hello");
auto status = stub_->ForwardEcho(&context, request, &response);
ASSERT_TRUE(status.ok());
for (int i = 0; i < 3; ++i) {
EXPECT_THAT(
response.output()[i],
::testing::AllOf(
::testing::HasSubstr(
absl::StrFormat("[%d body] StatusCode=200\n", i)),
::testing::HasSubstr(
absl::StrFormat("[%d body] Hostname=hostname\n", i)),
::testing::HasSubstr(absl::StrFormat("[%d body] Echo=hello\n", i)),
::testing::HasSubstr(absl::StrFormat("[%d body] Host=", i)),
::testing::HasSubstr(
absl::StrFormat("[%d body] ServiceVersion=v1", i))));
}
}
TEST_F(EchoTest, ForwardEchoTestUnhandledProtocols) {
ClientContext context;
ForwardEchoRequest request;
ForwardEchoResponse response;
request.set_count(3);
request.set_qps(1);
request.set_timeout_micros(20 * 1000 * 1000); // 20 seconds
// http protocol is unhandled by EchoTestServiceImpl and should be forwarded
// to SimpleEchoTestServiceImpl
request.set_url(absl::StrCat("http://", server_address_));
request.set_message("hello");
auto status = stub_->ForwardEcho(&context, request, &response);
ASSERT_TRUE(status.ok()) << "Code = " << status.error_code()
<< " Message = " << status.error_message();
ASSERT_FALSE(response.output().empty());
EXPECT_EQ(response.output()[0], "hello");
}
TEST_F(EchoTest, ForwardEchoFailure) {
simple_test_service_impl_.set_fail_rpc(true);
ClientContext context;
ForwardEchoRequest request;
ForwardEchoResponse response;
request.set_count(3);
request.set_qps(1);
request.set_timeout_micros(20 * 1000 * 1000); // 20 seconds
// Use the unhandled protocol to make sure that we forward the request to
// SimpleEchoTestServerImpl.
request.set_url(absl::StrCat("http://", server_address_));
request.set_message("hello");
auto status = stub_->ForwardEcho(&context, request, &response);
ASSERT_EQ(status.error_code(), StatusCode::UNAVAILABLE);
}
} // namespace
} // namespace testing
} // namespace grpc
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
grpc::testing::TestEnvironment env(&argc, argv);
grpc_init();
auto result = RUN_ALL_TESTS();
grpc_shutdown();
return result;
}
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