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#region Copyright notice and license
// Copyright 2015 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion
using System;
using System.Diagnostics;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Grpc.Core;
using Grpc.Core.Internal;
using Grpc.Core.Utils;
using NUnit.Framework;
namespace Grpc.Core.Tests
{
public class ContextPropagationTest
{
MockServiceHelper helper;
Server server;
Channel channel;
[SetUp]
public void Init()
{
helper = new MockServiceHelper();
server = helper.GetServer();
server.Start();
channel = helper.GetChannel();
}
[TearDown]
public void Cleanup()
{
channel.ShutdownAsync().Wait();
server.ShutdownAsync().Wait();
}
[Test]
public async Task PropagateCancellation()
{
var readyToCancelTcs = new TaskCompletionSource<object>();
var successTcs = new TaskCompletionSource<string>();
helper.UnaryHandler = new UnaryServerMethod<string, string>(async (request, context) =>
{
readyToCancelTcs.SetResult(null); // child call running, ready to parent call
while (!context.CancellationToken.IsCancellationRequested)
{
await Task.Delay(10);
}
successTcs.SetResult("CHILD_CALL_CANCELLED");
return "";
});
helper.ClientStreamingHandler = new ClientStreamingServerMethod<string, string>(async (requestStream, context) =>
{
var propagationToken = context.CreatePropagationToken();
Assert.IsNotNull(propagationToken.ParentCall);
var callOptions = new CallOptions(propagationToken: propagationToken);
try
{
await Calls.AsyncUnaryCall(helper.CreateUnaryCall(callOptions), "xyz");
}
catch(RpcException)
{
// Child call will get cancelled, eat the exception.
}
return "";
});
var cts = new CancellationTokenSource();
var parentCall = Calls.AsyncClientStreamingCall(helper.CreateClientStreamingCall(new CallOptions(cancellationToken: cts.Token)));
await readyToCancelTcs.Task;
cts.Cancel();
try
{
// cannot use Assert.ThrowsAsync because it uses Task.Wait and would deadlock.
await parentCall;
Assert.Fail();
}
catch (RpcException)
{
}
Assert.AreEqual("CHILD_CALL_CANCELLED", await successTcs.Task);
}
[Test]
public async Task PropagateDeadline()
{
var deadline = DateTime.UtcNow.AddDays(7);
helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) =>
{
Assert.IsTrue(context.Deadline < deadline.AddMinutes(1));
Assert.IsTrue(context.Deadline > deadline.AddMinutes(-1));
return Task.FromResult("PASS");
});
helper.ClientStreamingHandler = new ClientStreamingServerMethod<string, string>(async (requestStream, context) =>
{
Assert.Throws(typeof(ArgumentException), () =>
{
// Trying to override deadline while propagating deadline from parent call will throw.
Calls.BlockingUnaryCall(helper.CreateUnaryCall(
new CallOptions(deadline: DateTime.UtcNow.AddDays(8),
propagationToken: context.CreatePropagationToken())), "");
});
var callOptions = new CallOptions(propagationToken: context.CreatePropagationToken());
return await Calls.AsyncUnaryCall(helper.CreateUnaryCall(callOptions), "xyz");
});
var call = Calls.AsyncClientStreamingCall(helper.CreateClientStreamingCall(new CallOptions(deadline: deadline)));
await call.RequestStream.CompleteAsync();
Assert.AreEqual("PASS", await call);
}
[Test]
public async Task SuppressDeadlinePropagation()
{
helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) =>
{
Assert.AreEqual(DateTime.MaxValue, context.Deadline);
return Task.FromResult("PASS");
});
helper.ClientStreamingHandler = new ClientStreamingServerMethod<string, string>(async (requestStream, context) =>
{
Assert.IsTrue(context.CancellationToken.CanBeCanceled);
var callOptions = new CallOptions(propagationToken: context.CreatePropagationToken(new ContextPropagationOptions(propagateDeadline: false)));
return await Calls.AsyncUnaryCall(helper.CreateUnaryCall(callOptions), "xyz");
});
var cts = new CancellationTokenSource();
var call = Calls.AsyncClientStreamingCall(helper.CreateClientStreamingCall(new CallOptions(deadline: DateTime.UtcNow.AddDays(7))));
await call.RequestStream.CompleteAsync();
Assert.AreEqual("PASS", await call);
}
}
}
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