add C# test demoing custom error details
diff --git a/src/csharp/Grpc.IntegrationTesting/CustomErrorDetailsTest.cs b/src/csharp/Grpc.IntegrationTesting/CustomErrorDetailsTest.cs
new file mode 100644
index 0000000..be996f9
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting/CustomErrorDetailsTest.cs
@@ -0,0 +1,112 @@
+#region Copyright notice and license
+
+// Copyright 2015-2016 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.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Google.Protobuf;
+using Grpc.Core;
+using Grpc.Core.Utils;
+using Grpc.Testing;
+using NUnit.Framework;
+
+namespace Grpc.IntegrationTesting
+{
+ /// <summary>
+ /// Shows how to attach custom error details as a binary trailer.
+ /// </summary>
+ public class CustomErrorDetailsTest
+ {
+ const string DebugInfoTrailerName = "debug-info-bin";
+ const string ExceptionDetail = "Exception thrown on purpose.";
+ const string Host = "localhost";
+ Server server;
+ Channel channel;
+ TestService.TestServiceClient client;
+
+ [TestFixtureSetUp]
+ public void Init()
+ {
+ // Disable SO_REUSEPORT to prevent https://github.com/grpc/grpc/issues/10755
+ server = new Server(new[] { new ChannelOption(ChannelOptions.SoReuseport, 0) })
+ {
+ Services = { TestService.BindService(new CustomErrorDetailsTestServiceImpl()) },
+ Ports = { { Host, ServerPort.PickUnused, ServerCredentials.Insecure } }
+ };
+ server.Start();
+
+ channel = new Channel(Host, server.Ports.Single().BoundPort, ChannelCredentials.Insecure);
+ client = new TestService.TestServiceClient(channel);
+ }
+
+ [TestFixtureTearDown]
+ public void Cleanup()
+ {
+ channel.ShutdownAsync().Wait();
+ server.ShutdownAsync().Wait();
+ }
+
+ [Test]
+ public async Task UnaryCall()
+ {
+ var call = client.UnaryCallAsync(new SimpleRequest { ResponseSize = 10 });
+
+ try
+ {
+ await call.ResponseAsync;
+ Assert.Fail();
+ }
+ catch (RpcException e)
+ {
+ Assert.AreEqual(StatusCode.Unknown, e.Status.StatusCode);
+ var debugInfo = GetDebugInfo(call.GetTrailers());
+ Assert.AreEqual(debugInfo.Detail, ExceptionDetail);
+ Assert.IsNotEmpty(debugInfo.StackEntries);
+ }
+ }
+
+ private DebugInfo GetDebugInfo(Metadata trailers)
+ {
+ var entry = trailers.First((e) => e.Key == DebugInfoTrailerName);
+ return DebugInfo.Parser.ParseFrom(entry.ValueBytes);
+ }
+
+ private class CustomErrorDetailsTestServiceImpl : TestService.TestServiceBase
+ {
+ public override async Task<SimpleResponse> UnaryCall(SimpleRequest request, ServerCallContext context)
+ {
+ try
+ {
+ throw new ArgumentException(ExceptionDetail);
+ }
+ catch (Exception e)
+ {
+ // Fill debug info with some structured details about the failure.
+ var debugInfo = new DebugInfo();
+ debugInfo.Detail = e.Message;
+ debugInfo.StackEntries.AddRange(e.StackTrace.Split(new[] { Environment.NewLine }, StringSplitOptions.None));
+ context.ResponseTrailers.Add(DebugInfoTrailerName, debugInfo.ToByteArray());
+ throw new RpcException(new Status(StatusCode.Unknown, "The handler threw exception."));
+ }
+ }
+ }
+ }
+}
diff --git a/src/csharp/generate_proto_csharp.sh b/src/csharp/generate_proto_csharp.sh
index 8caaaab..1a1adbb 100755
--- a/src/csharp/generate_proto_csharp.sh
+++ b/src/csharp/generate_proto_csharp.sh
@@ -37,4 +37,4 @@
# don't match the package names. Setting -I to the correct value src/proto
# breaks the code generation.
$PROTOC --plugin=$PLUGIN --csharp_out=$TESTING_DIR --grpc_out=$TESTING_DIR \
- -I . src/proto/grpc/testing/{control,empty,messages,metrics,payloads,services,stats,test}.proto
+ -I . src/proto/grpc/testing/{control,echo_messages,empty,messages,metrics,payloads,services,stats,test}.proto
diff --git a/src/csharp/tests.json b/src/csharp/tests.json
index 707d140..bc6adbb 100644
--- a/src/csharp/tests.json
+++ b/src/csharp/tests.json
@@ -42,6 +42,7 @@
"Grpc.HealthCheck.Tests.HealthServiceImplTest"
],
"Grpc.IntegrationTesting": [
+ "Grpc.IntegrationTesting.CustomErrorDetailsTest",
"Grpc.IntegrationTesting.GeneratedClientTest",
"Grpc.IntegrationTesting.GeneratedServiceBaseTest",
"Grpc.IntegrationTesting.HistogramTest",