grpc/src/csharp/Grpc.Core.Tests/ChannelTest.cs

#region Copyright notice and license

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//
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// copyright notice, this list of conditions and the following disclaimer
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#endregion

using System;
using Grpc.Core;
using Grpc.Core.Internal;
using Grpc.Core.Utils;
using NUnit.Framework;

namespace Grpc.Core.Tests
{
    public class ChannelTest
    {
        [Test]
        public void Constructor_RejectsInvalidParams()
        {
            Assert.Throws(typeof(ArgumentNullException), () => new Channel(null, Credentials.Insecure));
        }

        [Test]
        public void State_IdleAfterCreation()
        {
            var channel = new Channel("localhost", Credentials.Insecure);
            Assert.AreEqual(ChannelState.Idle, channel.State);
            channel.ShutdownAsync().Wait();
        }

        [Test]
        public void WaitForStateChangedAsync_InvalidArgument()
        {
            var channel = new Channel("localhost", Credentials.Insecure);
            Assert.Throws(typeof(ArgumentException), () => channel.WaitForStateChangedAsync(ChannelState.FatalFailure));
            channel.ShutdownAsync().Wait();
        }

        [Test]
        public void ResolvedTarget()
        {
            var channel = new Channel("127.0.0.1", Credentials.Insecure);
            Assert.IsTrue(channel.ResolvedTarget.Contains("127.0.0.1"));
            channel.ShutdownAsync().Wait();
        }

        [Test]
        public void Shutdown_AllowedOnlyOnce()
        {
            var channel = new Channel("localhost", Credentials.Insecure);
            channel.ShutdownAsync().Wait();
            Assert.Throws(typeof(InvalidOperationException), () => channel.ShutdownAsync().GetAwaiter().GetResult());
        }
    }
}