Initial checkin of gRPC to third_party/

third_party/grpc/src/csharp/Grpc.Examples.Tests/MathClientServerTests.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.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Utils;
+using NUnit.Framework;
+
+namespace Math.Tests
+{
+    /// <summary>
+    /// Math client talks to local math server.
+    /// </summary>
+    public class MathClientServerTest
+    {
+        const string Host = "localhost";
+        Server server;
+        Channel channel;
+        Math.MathClient client;
+
+        [TestFixtureSetUp]
+        public void Init()
+        {
+            server = new Server
+            {
+                Services = { Math.BindService(new MathServiceImpl()) },
+                Ports = { { Host, ServerPort.PickUnused, ServerCredentials.Insecure } }
+            };
+            server.Start();
+            channel = new Channel(Host, server.Ports.Single().BoundPort, ChannelCredentials.Insecure);
+            client = Math.NewClient(channel);
+        }
+
+        [TestFixtureTearDown]
+        public void Cleanup()
+        {
+            channel.ShutdownAsync().Wait();
+            server.ShutdownAsync().Wait();
+        }
+
+        [Test]
+        public void Div1()
+        {
+            DivReply response = client.Div(new DivArgs { Dividend = 10, Divisor = 3 });
+            Assert.AreEqual(3, response.Quotient);
+            Assert.AreEqual(1, response.Remainder);
+        }
+
+        [Test]
+        public void Div2()
+        {
+            DivReply response = client.Div(new DivArgs { Dividend = 0, Divisor = 1 });
+            Assert.AreEqual(0, response.Quotient);
+            Assert.AreEqual(0, response.Remainder);
+        }
+
+        [Test]
+        public void DivByZero()
+        {
+            var ex = Assert.Throws<RpcException>(() => client.Div(new DivArgs { Dividend = 0, Divisor = 0 }));
+            Assert.AreEqual(StatusCode.Unknown, ex.Status.StatusCode);
+        }
+
+        [Test]
+        public async Task DivAsync()
+        {
+            DivReply response = await client.DivAsync(new DivArgs { Dividend = 10, Divisor = 3 });
+            Assert.AreEqual(3, response.Quotient);
+            Assert.AreEqual(1, response.Remainder);
+        }
+
+        [Test]
+        public async Task Fib()
+        {
+            using (var call = client.Fib(new FibArgs { Limit = 6 }))
+            {
+                var responses = await call.ResponseStream.ToListAsync();
+                CollectionAssert.AreEqual(new List<long> { 1, 1, 2, 3, 5, 8 },
+                    responses.ConvertAll((n) => n.Num_));
+            }
+        }
+
+        [Test]
+        public async Task FibWithCancel()
+        {
+            var cts = new CancellationTokenSource();
+
+            using (var call = client.Fib(new FibArgs { Limit = 0 }, cancellationToken: cts.Token))
+            {
+                List<long> responses = new List<long>();
+
+                try
+                {
+                    while (await call.ResponseStream.MoveNext())
+                    {
+                        if (responses.Count == 0)
+                        {
+                            cts.CancelAfter(500);  // make sure we cancel soon
+                        }
+                        responses.Add(call.ResponseStream.Current.Num_);
+                    }
+                    Assert.Fail();
+                }
+                catch (RpcException e)
+                {
+                    Assert.IsTrue(responses.Count > 0);
+                    Assert.AreEqual(StatusCode.Cancelled, e.Status.StatusCode);
+                }
+            }
+        }
+
+        [Test]
+        public async Task FibWithDeadline()
+        {
+            using (var call = client.Fib(new FibArgs { Limit = 0 }, 
+                deadline: DateTime.UtcNow.AddMilliseconds(500)))
+            {
+                var ex = Assert.Throws<RpcException>(async () => await call.ResponseStream.ToListAsync());
+
+                // We can't guarantee the status code always DeadlineExceeded. See issue #2685.
+                Assert.Contains(ex.Status.StatusCode, new[] { StatusCode.DeadlineExceeded, StatusCode.Internal });
+            }
+        }
+
+        // TODO: test Fib with limit=0 and cancellation
+        [Test]
+        public async Task Sum()
+        {
+            using (var call = client.Sum())
+            {
+                var numbers = new List<long> { 10, 20, 30 }.ConvertAll(n => new Num { Num_ = n });
+
+                await call.RequestStream.WriteAllAsync(numbers);
+                var result = await call.ResponseAsync;
+                Assert.AreEqual(60, result.Num_);
+            }
+        }
+
+        [Test]
+        public async Task DivMany()
+        {
+            var divArgsList = new List<DivArgs>
+            {
+                new DivArgs { Dividend = 10, Divisor = 3 },
+                new DivArgs { Dividend = 100, Divisor = 21 },
+                new DivArgs { Dividend = 7, Divisor = 2 }
+            };
+
+            using (var call = client.DivMany())
+            {
+                await call.RequestStream.WriteAllAsync(divArgsList);
+                var result = await call.ResponseStream.ToListAsync();
+
+                CollectionAssert.AreEqual(new long[] { 3, 4, 3 }, result.ConvertAll((divReply) => divReply.Quotient));
+                CollectionAssert.AreEqual(new long[] { 1, 16, 1 }, result.ConvertAll((divReply) => divReply.Remainder));
+            }
+        }
+    }
+}