grpc/src/csharp/Grpc.Core.Tests/ClientServerTest.cs

#region Copyright notice and license

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#endregion

using System;
using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;
using Grpc.Core;
using Grpc.Core.Internal;
using Grpc.Core.Utils;
using NUnit.Framework;

namespace Grpc.Core.Tests
{
    public class ClientServerTest
    {
        string host = "localhost";

        string serviceName = "/tests.Test";

        Method<string, string> unaryEchoStringMethod = new Method<string, string>(
            MethodType.Unary,
            "/tests.Test/UnaryEchoString",
            Marshallers.StringMarshaller,
            Marshallers.StringMarshaller);

        [TestFixtureSetUp]
        public void Init()
        {
            GrpcEnvironment.Initialize();
        }

        [TestFixtureTearDown]
        public void Cleanup()
        {
            GrpcEnvironment.Shutdown();
        }

        [Test]
        public void UnaryCall()
        {
            Server server = new Server();
            server.AddServiceDefinition(
                ServerServiceDefinition.CreateBuilder(serviceName)
                    .AddMethod(unaryEchoStringMethod, HandleUnaryEchoString).Build());

            int port = server.AddListeningPort(host + ":0");
            server.Start();

            using (Channel channel = new Channel(host + ":" + port))
            {
                var call = new Call<string, string>(serviceName, unaryEchoStringMethod, channel, Metadata.Empty);

                Assert.AreEqual("ABC", Calls.BlockingUnaryCall(call, "ABC", default(CancellationToken)));

                Assert.AreEqual("abcdef", Calls.BlockingUnaryCall(call, "abcdef", default(CancellationToken)));
            }

            server.ShutdownAsync().Wait();
        }

        [Test]
        public void UnaryCallPerformance()
        {
            Server server = new Server();
            server.AddServiceDefinition(
                ServerServiceDefinition.CreateBuilder(serviceName)
                .AddMethod(unaryEchoStringMethod, HandleUnaryEchoString).Build());

            int port = server.AddListeningPort(host + ":0");
            server.Start();

            using (Channel channel = new Channel(host + ":" + port))
            {
                var call = new Call<string, string>(serviceName, unaryEchoStringMethod, channel, Metadata.Empty);
                BenchmarkUtil.RunBenchmark(100, 1000,
                                           () => { Calls.BlockingUnaryCall(call, "ABC", default(CancellationToken)); });
            }

            server.ShutdownAsync().Wait();
        }

        [Test]
        public void UnknownMethodHandler()
        {
            Server server = new Server();
            server.AddServiceDefinition(
                ServerServiceDefinition.CreateBuilder(serviceName).Build());

            int port = server.AddListeningPort(host + ":0");
            server.Start();

            using (Channel channel = new Channel(host + ":" + port))
            {
                var call = new Call<string, string>(serviceName, unaryEchoStringMethod, channel, Metadata.Empty);

                try
                {
                    Calls.BlockingUnaryCall(call, "ABC", default(CancellationToken));
                    Assert.Fail();
                }
                catch (RpcException e)
                {
                    Assert.AreEqual(StatusCode.Unimplemented, e.Status.StatusCode);
                }
            }

            server.ShutdownAsync().Wait();
        }

        private void HandleUnaryEchoString(string request, IObserver<string> responseObserver)
        {
            responseObserver.OnNext(request);
            responseObserver.OnCompleted();
        }
    }
}