Tests,GrpcClient,GrpcServer: made e2e GRPC test

Made end-to-end GRPC test that makes sure GRPC communication is
working.

src/FX.GrpcClient/Instance.cs

@@ -12,9 +12,12 @@ public class Instance
         private static string serverFqdn =
             "localhost";
 
+        public static readonly int Port = 5178;
+        public static readonly int HttpsPort = 7178;
+
         public FXGrpcService.FXGrpcServiceClient Connect()
         {
-            var channel = GrpcChannel.ForAddress($"http://{serverFqdn}:8080");
+            var channel = GrpcChannel.ForAddress($"http://{serverFqdn}:{Port}");
             var client = new FXGrpcService.FXGrpcServiceClient(channel);
             return client;
         }
@@ -23,9 +26,10 @@ public async Task<string> SendMessage(string message)
         {
             var client = Connect();
             var reply = await client.GenericMethodAsync(
-                new GenericInputParam { MsgIn = "hello" }
+                new GenericInputParam { MsgIn = message }
             );
             Console.WriteLine($"Got response: {reply.MsgOut}");
+            return reply.MsgOut;
         }
     }
 }

src/FX.GrpcService/Services/FXService.cs

@@ -20,7 +20,7 @@ public override async Task GenericStreamOutputMethod(GenericInputParam request,
         {
             Console.WriteLine(request.MsgIn);
 
-            await responseStream.WriteAsync(new GenericOutputParam { MsgOut = "ack" });
+            await responseStream.WriteAsync(new GenericOutputParam { MsgOut = "received " + request.MsgIn });
         }
     }
 }

src/FX.Tests/E2ETests.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Threading.Tasks;
+using FsharpExchangeDotNetStandard;
+
+using NUnit.Framework;
+using StackExchange.Redis;
+
+namespace FsharpExchange.Tests
+{
+    [TestFixture]
+    public class E2ETests
+    {
+        private Process LaunchGrpcServer()
+        {
+            var solutionDir = (new DirectoryInfo(Environment.CurrentDirectory)).Parent?.Parent?.Parent?.Parent?.Parent;
+            var serviceExeDir = Path.Join(solutionDir.FullName, "src", "FX.GrpcService", "bin", "Debug", "net8.0");
+
+            var argsString = $"--urls http://localhost:{GrpcClient.Instance.Port}";
+
+            if (OperatingSystem.IsWindows())
+            {
+                var serviceExePath = Path.Join(serviceExeDir, "FX.GrpcService.exe");
+                return Process.Start(serviceExePath, argsString);
+            }
+            else 
+            {
+                var processInfo = new ProcessStartInfo
+                {
+                    UseShellExecute = false,
+                    CreateNoWindow = true,
+                    FileName = "dotnet",
+                    Arguments = Path.Join(serviceExeDir, "FX.GrpcService.dll") + " " + argsString
+                };
+                return Process.Start(processInfo);
+            }
+        }
+
+        [Test]
+        async public Task GrpcE2ETest()
+        {
+            using var serverProcess = LaunchGrpcServer();
+            await Task.Delay(TimeSpan.FromSeconds(1.0));
+
+            var client = new GrpcClient.Instance();
+            client.Connect();
+
+            var message = "hello";
+            var response = await client.SendMessage(message);
+
+            Assert.That(response, Is.EqualTo("received " + message));
+        }
+    }
+}

src/FX.Tests/FX.Tests.csproj

@@ -17,5 +17,6 @@
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\FX.Core\FX.Core.fsproj" />
+    <ProjectReference Include="..\FX.GrpcClient\FX.GrpcClient.csproj" />
   </ItemGroup>
 </Project>