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#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.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>(async (request, context) =>
{
Assert.IsTrue(context.Deadline < deadline.AddMinutes(1));
Assert.IsTrue(context.Deadline > deadline.AddMinutes(-1));
return "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>(async (request, context) =>
{
Assert.AreEqual(DateTime.MaxValue, context.Deadline);
return "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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