Initial checkin of gRPC to third_party/

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

+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Profiling;
+using Grpc.Core.Utils;
+using NUnit.Framework;
+
+namespace Grpc.Core.Tests
+{
+    public class ClientServerTest
+    {
+        const string Host = "127.0.0.1";
+
+        MockServiceHelper helper;
+        Server server;
+        Channel channel;
+
+        [SetUp]
+        public void Init()
+        {
+            helper = new MockServiceHelper(Host);
+            server = helper.GetServer();
+            server.Start();
+            channel = helper.GetChannel();
+        }
+
+        [TearDown]
+        public void Cleanup()
+        {
+            channel.ShutdownAsync().Wait();
+            server.ShutdownAsync().Wait();
+        }
+
+        [Test]
+        public async Task UnaryCall()
+        {
+            helper.UnaryHandler = new UnaryServerMethod<string, string>(async (request, context) =>
+            {
+                return request;
+            });
+
+            Assert.AreEqual("ABC", Calls.BlockingUnaryCall(helper.CreateUnaryCall(), "ABC"));
+
+            Assert.AreEqual("ABC", await Calls.AsyncUnaryCall(helper.CreateUnaryCall(), "ABC"));
+        }
+
+        [Test]
+        public void UnaryCall_ServerHandlerThrows()
+        {
+            helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) =>
+            {
+                throw new Exception("This was thrown on purpose by a test");
+            });
+                
+            var ex = Assert.Throws<RpcException>(() => Calls.BlockingUnaryCall(helper.CreateUnaryCall(), "abc"));
+            Assert.AreEqual(StatusCode.Unknown, ex.Status.StatusCode); 
+
+            var ex2 = Assert.Throws<RpcException>(async () => await Calls.AsyncUnaryCall(helper.CreateUnaryCall(), "abc"));
+            Assert.AreEqual(StatusCode.Unknown, ex2.Status.StatusCode);
+        }
+
+        [Test]
+        public void UnaryCall_ServerHandlerThrowsRpcException()
+        {
+            helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) =>
+            {
+                throw new RpcException(new Status(StatusCode.Unauthenticated, ""));
+            });
+
+            var ex = Assert.Throws<RpcException>(() => Calls.BlockingUnaryCall(helper.CreateUnaryCall(), "abc"));
+            Assert.AreEqual(StatusCode.Unauthenticated, ex.Status.StatusCode);
+
+            var ex2 = Assert.Throws<RpcException>(async () => await Calls.AsyncUnaryCall(helper.CreateUnaryCall(), "abc"));
+            Assert.AreEqual(StatusCode.Unauthenticated, ex2.Status.StatusCode);
+        }
+
+        [Test]
+        public void UnaryCall_ServerHandlerSetsStatus()
+        {
+            helper.UnaryHandler = new UnaryServerMethod<string, string>(async (request, context) =>
+            {
+                context.Status = new Status(StatusCode.Unauthenticated, "");
+                return "";
+            });
+
+            var ex = Assert.Throws<RpcException>(() => Calls.BlockingUnaryCall(helper.CreateUnaryCall(), "abc"));
+            Assert.AreEqual(StatusCode.Unauthenticated, ex.Status.StatusCode);
+
+            var ex2 = Assert.Throws<RpcException>(async () => await Calls.AsyncUnaryCall(helper.CreateUnaryCall(), "abc"));
+            Assert.AreEqual(StatusCode.Unauthenticated, ex2.Status.StatusCode);
+        }
+
+        [Test]
+        public async Task ClientStreamingCall()
+        {
+            helper.ClientStreamingHandler = new ClientStreamingServerMethod<string, string>(async (requestStream, context) =>
+            {
+                string result = "";
+                await requestStream.ForEachAsync(async (request) =>
+                {
+                    result += request;
+                });
+                await Task.Delay(100);
+                return result;
+            });
+
+            var call = Calls.AsyncClientStreamingCall(helper.CreateClientStreamingCall());
+            await call.RequestStream.WriteAllAsync(new string[] { "A", "B", "C" });
+            Assert.AreEqual("ABC", await call.ResponseAsync);
+
+            Assert.AreEqual(StatusCode.OK, call.GetStatus().StatusCode);
+            Assert.IsNotNull(call.GetTrailers());
+        }
+
+        [Test]
+        public async Task ServerStreamingCall()
+        {
+            helper.ServerStreamingHandler = new ServerStreamingServerMethod<string, string>(async (request, responseStream, context) =>
+            {
+                await responseStream.WriteAllAsync(request.Split(new []{' '}));
+                context.ResponseTrailers.Add("xyz", "");
+            });
+
+            var call = Calls.AsyncServerStreamingCall(helper.CreateServerStreamingCall(), "A B C");
+            CollectionAssert.AreEqual(new string[] { "A", "B", "C" }, await call.ResponseStream.ToListAsync());
+
+            Assert.AreEqual(StatusCode.OK, call.GetStatus().StatusCode);
+            Assert.IsNotNull("xyz", call.GetTrailers()[0].Key);
+        }
+
+        [Test]
+        public async Task DuplexStreamingCall()
+        {
+            helper.DuplexStreamingHandler = new DuplexStreamingServerMethod<string, string>(async (requestStream, responseStream, context) =>
+            {
+                while (await requestStream.MoveNext())
+                {
+                    await responseStream.WriteAsync(requestStream.Current);
+                }
+                context.ResponseTrailers.Add("xyz", "xyz-value");
+            });
+
+            var call = Calls.AsyncDuplexStreamingCall(helper.CreateDuplexStreamingCall());
+            await call.RequestStream.WriteAllAsync(new string[] { "A", "B", "C" });
+            CollectionAssert.AreEqual(new string[] { "A", "B", "C" }, await call.ResponseStream.ToListAsync());
+
+            Assert.AreEqual(StatusCode.OK, call.GetStatus().StatusCode);
+            Assert.IsNotNull("xyz-value", call.GetTrailers()[0].Value);
+        }
+
+        [Test]
+        public async Task ClientStreamingCall_CancelAfterBegin()
+        {
+            var barrier = new TaskCompletionSource<object>();
+
+            helper.ClientStreamingHandler = new ClientStreamingServerMethod<string, string>(async (requestStream, context) =>
+            {
+                barrier.SetResult(null);
+                await requestStream.ToListAsync();
+                return "";
+            });
+
+            var cts = new CancellationTokenSource();
+            var call = Calls.AsyncClientStreamingCall(helper.CreateClientStreamingCall(new CallOptions(cancellationToken: cts.Token)));
+
+            await barrier.Task;  // make sure the handler has started.
+            cts.Cancel();
+
+            var ex = Assert.Throws<RpcException>(async () => await call.ResponseAsync);
+            Assert.AreEqual(StatusCode.Cancelled, ex.Status.StatusCode);
+        }
+
+        [Test]
+        public async Task AsyncUnaryCall_EchoMetadata()
+        {
+            helper.UnaryHandler = new UnaryServerMethod<string, string>(async (request, context) =>
+            {
+                foreach (Metadata.Entry metadataEntry in context.RequestHeaders)
+                {
+                    if (metadataEntry.Key != "user-agent")
+                    {
+                        context.ResponseTrailers.Add(metadataEntry);
+                    }
+                }
+                return "";
+            });
+
+            var headers = new Metadata
+            {
+                { "ascii-header", "abcdefg" },
+                { "binary-header-bin", new byte[] { 1, 2, 3, 0, 0xff } }
+            };
+            var call = Calls.AsyncUnaryCall(helper.CreateUnaryCall(new CallOptions(headers: headers)), "ABC");
+            await call;
+
+            Assert.AreEqual(StatusCode.OK, call.GetStatus().StatusCode);
+
+            var trailers = call.GetTrailers();
+            Assert.AreEqual(2, trailers.Count);
+            Assert.AreEqual(headers[0].Key, trailers[0].Key);
+            Assert.AreEqual(headers[0].Value, trailers[0].Value);
+
+            Assert.AreEqual(headers[1].Key, trailers[1].Key);
+            CollectionAssert.AreEqual(headers[1].ValueBytes, trailers[1].ValueBytes);
+        }
+
+        [Test]
+        public void UnknownMethodHandler()
+        {
+            var nonexistentMethod = new Method<string, string>(
+                MethodType.Unary,
+                MockServiceHelper.ServiceName,
+                "NonExistentMethod",
+                Marshallers.StringMarshaller,
+                Marshallers.StringMarshaller);
+
+            var callDetails = new CallInvocationDetails<string, string>(channel, nonexistentMethod, new CallOptions());
+
+            var ex = Assert.Throws<RpcException>(() => Calls.BlockingUnaryCall(callDetails, "abc"));
+            Assert.AreEqual(StatusCode.Unimplemented, ex.Status.StatusCode);
+        }
+
+        [Test]
+        public void ServerCallContext_PeerInfoPresent()
+        {
+            helper.UnaryHandler = new UnaryServerMethod<string, string>(async (request, context) =>
+            {
+                return context.Peer;
+            });
+
+            string peer = Calls.BlockingUnaryCall(helper.CreateUnaryCall(), "abc");
+            Assert.IsTrue(peer.Contains(Host));
+        }
+
+        [Test]
+        public void ServerCallContext_HostAndMethodPresent()
+        {
+            helper.UnaryHandler = new UnaryServerMethod<string, string>(async (request, context) =>
+            {
+                Assert.IsTrue(context.Host.Contains(Host));
+                Assert.AreEqual("/tests.Test/Unary", context.Method);
+                return "PASS";
+            });
+            Assert.AreEqual("PASS", Calls.BlockingUnaryCall(helper.CreateUnaryCall(), "abc"));
+        }
+
+        [Test]
+        public async Task Channel_WaitForStateChangedAsync()
+        {
+            helper.UnaryHandler = new UnaryServerMethod<string, string>(async (request, context) =>
+            {
+                return request;
+            });
+
+            Assert.Throws(typeof(TaskCanceledException), 
+                async () => await channel.WaitForStateChangedAsync(channel.State, DateTime.UtcNow.AddMilliseconds(10)));
+
+            var stateChangedTask = channel.WaitForStateChangedAsync(channel.State);
+
+            await Calls.AsyncUnaryCall(helper.CreateUnaryCall(), "abc");
+
+            await stateChangedTask;
+            Assert.AreEqual(ChannelState.Ready, channel.State);
+        }
+
+        [Test]
+        public async Task Channel_ConnectAsync()
+        {
+            await channel.ConnectAsync();
+            Assert.AreEqual(ChannelState.Ready, channel.State);
+
+            await channel.ConnectAsync(DateTime.UtcNow.AddMilliseconds(1000));
+            Assert.AreEqual(ChannelState.Ready, channel.State);
+        }
+    }
+}