src/csharp/Grpc.IntegrationTesting/HeaderInterceptorTest.cs

#region Copyright notice and license

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//
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#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 Grpc.Testing;
using NUnit.Framework;

namespace Grpc.IntegrationTesting
{
    public class HeaderInterceptorTest
    {
        const string Host = "localhost";
        Server server;
        Channel channel;
        TestService.TestServiceClient client;

        [TestFixtureSetUp]
        public void Init()
        {
            server = new Server
            {
                Services = { TestService.BindService(new TestServiceImpl()) },
                Ports = { { Host, ServerPort.PickUnused, ServerCredentials.Insecure } }
            };
            server.Start();

            channel = new Channel(Host, server.Ports.Single().BoundPort, ChannelCredentials.Insecure);
            client = TestService.NewClient(channel);
        }

        [TestFixtureTearDown]
        public void Cleanup()
        {
            channel.ShutdownAsync().Wait();
            server.ShutdownAsync().Wait();
        }

        [Test]
        public async Task HeaderInterceptor_CreateMetadata()
        {
            var key = "x-grpc-test-echo-initial";
            client.HeaderInterceptor = new HeaderInterceptor((method, metadata) =>
            {
                metadata.Add(key, "ABC");
            });

            var call = client.UnaryCallAsync(new SimpleRequest());
            await call;

           var responseHeaders = await call.ResponseHeadersAsync;
           Assert.AreEqual("ABC", responseHeaders.First((entry) => entry.Key == key).Value);
        }

        [Test]
        public async Task HeaderInterceptor_AppendMetadata()
        {
            var initialKey = "x-grpc-test-echo-initial";
            var trailingKey = "x-grpc-test-echo-trailing-bin";

            client.HeaderInterceptor = new HeaderInterceptor((method, metadata) =>
            {
                metadata.Add(initialKey, "ABC");
            });

            var headers = new Metadata
            {
                { trailingKey, new byte[] {0xaa} }
            };
            var call = client.UnaryCallAsync(new SimpleRequest(), headers: headers);
            await call;

            var responseHeaders = await call.ResponseHeadersAsync;
            Assert.AreEqual("ABC", responseHeaders.First((entry) => entry.Key == initialKey).Value);
            CollectionAssert.AreEqual(new byte[] {0xaa}, call.GetTrailers().First((entry) => entry.Key == trailingKey).ValueBytes);
        }
    }
}