1 files changed, 126 insertions, 0 deletions
diff --git a/src/csharp/Grpc.Core.Tests/Interceptors/ServerInterceptorTest.cs b/src/csharp/Grpc.Core.Tests/Interceptors/ServerInterceptorTest.cs
new file mode 100644
index 0000000000..e76f21d098
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+++ b/src/csharp/Grpc.Core.Tests/Interceptors/ServerInterceptorTest.cs
@@ -0,0 +1,126 @@
+#region Copyright notice and license
+
+// 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.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Interceptors;
+using Grpc.Core.Internal;
+using Grpc.Core.Tests;
+using Grpc.Core.Utils;
+using NUnit.Framework;
+
+namespace Grpc.Core.Interceptors.Tests
+{
+    public class ServerInterceptorTest
+    {
+        const string Host = "127.0.0.1";
+
+        [Test]
+        public void AddRequestHeaderInServerInterceptor()
+        {
+            var helper = new MockServiceHelper(Host);
+            const string MetadataKey = "x-interceptor";
+            const string MetadataValue = "hello world";
+            var interceptor = new ServerCallContextInterceptor(ctx => ctx.RequestHeaders.Add(new Metadata.Entry(MetadataKey, MetadataValue)));
+            helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) =>
+            {
+                var interceptorHeader = context.RequestHeaders.Last(m => (m.Key == MetadataKey)).Value;
+                Assert.AreEqual(interceptorHeader, MetadataValue);
+                return Task.FromResult("PASS");
+            });
+            helper.ServiceDefinition = helper.ServiceDefinition.Intercept(interceptor);
+            var server = helper.GetServer();
+            server.Start();
+            var channel = helper.GetChannel();
+            Assert.AreEqual("PASS", Calls.BlockingUnaryCall(helper.CreateUnaryCall(), ""));
+        }
+
+        [Test]
+        public void VerifyInterceptorOrdering()
+        {
+            var helper = new MockServiceHelper(Host);
+            helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) =>
+            {
+                return Task.FromResult("PASS");
+            });
+            var stringBuilder = new StringBuilder();
+            helper.ServiceDefinition = helper.ServiceDefinition
+                .Intercept(new ServerCallContextInterceptor(ctx => stringBuilder.Append("A")))
+                .Intercept(new ServerCallContextInterceptor(ctx => stringBuilder.Append("B1")),
+                    new ServerCallContextInterceptor(ctx => stringBuilder.Append("B2")),
+                    new ServerCallContextInterceptor(ctx => stringBuilder.Append("B3")))
+                .Intercept(new ServerCallContextInterceptor(ctx => stringBuilder.Append("C")));
+            var server = helper.GetServer();
+            server.Start();
+            var channel = helper.GetChannel();
+            Assert.AreEqual("PASS", Calls.BlockingUnaryCall(helper.CreateUnaryCall(), ""));
+            Assert.AreEqual("CB1B2B3A", stringBuilder.ToString());
+        }
+
+        [Test]
+        public void CheckNullInterceptorRegistrationFails()
+        {
+            var helper = new MockServiceHelper(Host);
+            var sd = helper.ServiceDefinition;
+            Assert.Throws<ArgumentNullException>(() => sd.Intercept(default(Interceptor)));
+            Assert.Throws<ArgumentNullException>(() => sd.Intercept(new[]{default(Interceptor)}));
+            Assert.Throws<ArgumentNullException>(() => sd.Intercept(new[]{new ServerCallContextInterceptor(ctx=>{}), null}));
+            Assert.Throws<ArgumentNullException>(() => sd.Intercept(default(Interceptor[])));
+        }
+
+        private class ServerCallContextInterceptor : Interceptor
+        {
+            readonly Action<ServerCallContext> interceptor;
+
+            public ServerCallContextInterceptor(Action<ServerCallContext> interceptor)
+            {
+                GrpcPreconditions.CheckNotNull(interceptor, nameof(interceptor));
+                this.interceptor = interceptor;
+            }
+
+            public override Task<TResponse> UnaryServerHandler<TRequest, TResponse>(TRequest request, ServerCallContext context, UnaryServerMethod<TRequest, TResponse> continuation)
+            {
+                interceptor(context);
+                return continuation(request, context);
+            }
+
+            public override Task<TResponse> ClientStreamingServerHandler<TRequest, TResponse>(IAsyncStreamReader<TRequest> requestStream, ServerCallContext context, ClientStreamingServerMethod<TRequest, TResponse> continuation)
+            {
+                interceptor(context);
+                return continuation(requestStream, context);
+            }
+
+            public override Task ServerStreamingServerHandler<TRequest, TResponse>(TRequest request, IServerStreamWriter<TResponse> responseStream, ServerCallContext context, ServerStreamingServerMethod<TRequest, TResponse> continuation)
+            {
+                interceptor(context);
+                return continuation(request, responseStream, context);
+            }
+
+            public override Task DuplexStreamingServerHandler<TRequest, TResponse>(IAsyncStreamReader<TRequest> requestStream, IServerStreamWriter<TResponse> responseStream, ServerCallContext context, DuplexStreamingServerMethod<TRequest, TResponse> continuation)
+            {
+                interceptor(context);
+                return continuation(requestStream, responseStream, context);
+            }
+        }
+    }
+}