grpc/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs

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#endregion

using System;
using System.Collections.Generic;
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
    {
        string host = "localhost";
        Server server;
        Channel channel;
        Math.IMathClient client;

        [TestFixtureSetUp]
        public void Init()
        {
            GrpcEnvironment.Initialize();

            server = new Server();
            server.AddServiceDefinition(Math.BindService(new MathServiceImpl()));
            int port = server.AddListeningPort(host, Server.PickUnusedPort);
            server.Start();
            channel = new Channel(host + ":" + port);

            // TODO(jtattermusch): get rid of the custom header here once we have dedicated tests
            // for header support.
            var stubConfig = new StubConfiguration((headerBuilder) =>
            {
                headerBuilder.Add(new Metadata.MetadataEntry("customHeader", "abcdef"));
            });
            client = Math.NewStub(channel, stubConfig);
        }

        [TestFixtureTearDown]
        public void Cleanup()
        {
            channel.Dispose();

            server.ShutdownAsync().Wait();
            GrpcEnvironment.Shutdown();
        }

        [Test]
        public void Div1()
        {
            DivReply response = client.Div(new DivArgs.Builder { Dividend = 10, Divisor = 3 }.Build());
            Assert.AreEqual(3, response.Quotient);
            Assert.AreEqual(1, response.Remainder);
        }

        [Test]
        public void Div2()
        {
            DivReply response = client.Div(new DivArgs.Builder { Dividend = 0, Divisor = 1 }.Build());
            Assert.AreEqual(0, response.Quotient);
            Assert.AreEqual(0, response.Remainder);
        }

        // TODO(jtattermusch): test division by zero

        [Test]
        public void DivAsync()
        {
            Task.Run(async () =>
            {
                DivReply response = await client.DivAsync(new DivArgs.Builder { Dividend = 10, Divisor = 3 }.Build());
                Assert.AreEqual(3, response.Quotient);
                Assert.AreEqual(1, response.Remainder);
            }).Wait();
        }

        [Test]
        public void Fib()
        {
            Task.Run(async () =>
            {
                var call = client.Fib(new FibArgs.Builder { Limit = 6 }.Build());

                var responses = await call.ResponseStream.ToList();
                CollectionAssert.AreEqual(new List<long> { 1, 1, 2, 3, 5, 8 },
                    responses.ConvertAll((n) => n.Num_));
            }).Wait();
        }

        // TODO: test Fib with limit=0 and cancellation
        [Test]
        public void Sum()
        {
            Task.Run(async () =>
            {
                var call = client.Sum();
                var numbers = new List<long> { 10, 20, 30 }.ConvertAll(
                         n => Num.CreateBuilder().SetNum_(n).Build());

                await call.RequestStream.WriteAll(numbers);
                var result = await call.Result;
                Assert.AreEqual(60, result.Num_);
            }).Wait();
        }

        [Test]
        public void DivMany()
        {
            Task.Run(async () =>
            {
                var divArgsList = new List<DivArgs>
                {
                    new DivArgs.Builder { Dividend = 10, Divisor = 3 }.Build(),
                    new DivArgs.Builder { Dividend = 100, Divisor = 21 }.Build(),
                    new DivArgs.Builder { Dividend = 7, Divisor = 2 }.Build()
                };

                var call = client.DivMany();
                await call.RequestStream.WriteAll(divArgsList);
                var result = await call.ResponseStream.ToList();

                CollectionAssert.AreEqual(new long[] { 3, 4, 3 }, result.ConvertAll((divReply) => divReply.Quotient));
                CollectionAssert.AreEqual(new long[] { 1, 16, 1 }, result.ConvertAll((divReply) => divReply.Remainder));
            }).Wait();
        }
    }
}