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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.Collections.Generic;
using System.IO;
using System.Runtime.InteropServices;
using System.Threading.Tasks;
using Grpc.Core.Internal;
using NUnit.Framework;
namespace Grpc.Core.Internal.Tests
{
/// <summary>
/// Uses fake native call to test interaction of <c>AsyncCallServer</c> wrapping code with C core in different situations.
/// </summary>
public class AsyncCallServerTest
{
Server server;
FakeNativeCall fakeCall;
AsyncCallServer<string, string> asyncCallServer;
[SetUp]
public void Init()
{
// Create a fake server just so we have an instance to refer to.
// The server won't actually be used at all.
server = new Server()
{
Ports = { { "localhost", 0, ServerCredentials.Insecure } }
};
server.Start();
fakeCall = new FakeNativeCall();
asyncCallServer = new AsyncCallServer<string, string>(
Marshallers.StringMarshaller.Serializer, Marshallers.StringMarshaller.Deserializer,
server);
asyncCallServer.InitializeForTesting(fakeCall);
}
[TearDown]
public void Cleanup()
{
server.ShutdownAsync().Wait();
}
[Test]
public void CancelNotificationAfterStartDisposes()
{
var finishedTask = asyncCallServer.ServerSideCallAsync();
fakeCall.ReceivedCloseOnServerCallback.OnReceivedCloseOnServer(true, cancelled: true);
AssertFinished(asyncCallServer, fakeCall, finishedTask);
}
[Test]
public void CancelNotificationAfterStartDisposesAfterPendingReadFinishes()
{
var finishedTask = asyncCallServer.ServerSideCallAsync();
var requestStream = new ServerRequestStream<string, string>(asyncCallServer);
var moveNextTask = requestStream.MoveNext();
fakeCall.ReceivedCloseOnServerCallback.OnReceivedCloseOnServer(true, cancelled: true);
fakeCall.ReceivedMessageCallback.OnReceivedMessage(true, null);
Assert.IsFalse(moveNextTask.Result);
AssertFinished(asyncCallServer, fakeCall, finishedTask);
}
[Test]
public void ReadAfterCancelNotificationCanSucceed()
{
var finishedTask = asyncCallServer.ServerSideCallAsync();
var requestStream = new ServerRequestStream<string, string>(asyncCallServer);
fakeCall.ReceivedCloseOnServerCallback.OnReceivedCloseOnServer(true, cancelled: true);
// Check that starting a read after cancel notification has been processed is legal.
var moveNextTask = requestStream.MoveNext();
Assert.IsFalse(moveNextTask.Result);
AssertFinished(asyncCallServer, fakeCall, finishedTask);
}
[Test]
public void ReadCompletionFailureClosesRequestStream()
{
var finishedTask = asyncCallServer.ServerSideCallAsync();
var requestStream = new ServerRequestStream<string, string>(asyncCallServer);
// if a read completion's success==false, the request stream will silently finish
// and we rely on C core cancelling the call.
var moveNextTask = requestStream.MoveNext();
fakeCall.ReceivedMessageCallback.OnReceivedMessage(false, null);
Assert.IsFalse(moveNextTask.Result);
fakeCall.ReceivedCloseOnServerCallback.OnReceivedCloseOnServer(true, cancelled: true);
AssertFinished(asyncCallServer, fakeCall, finishedTask);
}
[Test]
public void WriteAfterCancelNotificationFails()
{
var finishedTask = asyncCallServer.ServerSideCallAsync();
var responseStream = new ServerResponseStream<string, string>(asyncCallServer);
fakeCall.ReceivedCloseOnServerCallback.OnReceivedCloseOnServer(true, cancelled: true);
// TODO(jtattermusch): should we throw a different exception type instead?
Assert.Throws(typeof(InvalidOperationException), () => responseStream.WriteAsync("request1"));
AssertFinished(asyncCallServer, fakeCall, finishedTask);
}
[Test]
public void WriteCompletionFailureThrows()
{
var finishedTask = asyncCallServer.ServerSideCallAsync();
var responseStream = new ServerResponseStream<string, string>(asyncCallServer);
var writeTask = responseStream.WriteAsync("request1");
fakeCall.SendCompletionCallback.OnSendCompletion(false);
Assert.ThrowsAsync(typeof(IOException), async () => await writeTask);
fakeCall.ReceivedCloseOnServerCallback.OnReceivedCloseOnServer(true, cancelled: true);
AssertFinished(asyncCallServer, fakeCall, finishedTask);
}
[Test]
public void WriteAndWriteStatusCanRunConcurrently()
{
var finishedTask = asyncCallServer.ServerSideCallAsync();
var responseStream = new ServerResponseStream<string, string>(asyncCallServer);
var writeTask = responseStream.WriteAsync("request1");
var writeStatusTask = asyncCallServer.SendStatusFromServerAsync(Status.DefaultSuccess, new Metadata(), null);
fakeCall.SendCompletionCallback.OnSendCompletion(true);
fakeCall.SendStatusFromServerCallback.OnSendStatusFromServerCompletion(true);
Assert.DoesNotThrowAsync(async () => await writeTask);
Assert.DoesNotThrowAsync(async () => await writeStatusTask);
fakeCall.ReceivedCloseOnServerCallback.OnReceivedCloseOnServer(true, cancelled: true);
AssertFinished(asyncCallServer, fakeCall, finishedTask);
}
[Test]
public void WriteAfterWriteStatusThrowsInvalidOperationException()
{
var finishedTask = asyncCallServer.ServerSideCallAsync();
var responseStream = new ServerResponseStream<string, string>(asyncCallServer);
asyncCallServer.SendStatusFromServerAsync(Status.DefaultSuccess, new Metadata(), null);
Assert.ThrowsAsync(typeof(InvalidOperationException), async () => await responseStream.WriteAsync("request1"));
fakeCall.SendStatusFromServerCallback.OnSendStatusFromServerCompletion(true);
fakeCall.ReceivedCloseOnServerCallback.OnReceivedCloseOnServer(true, cancelled: true);
AssertFinished(asyncCallServer, fakeCall, finishedTask);
}
static void AssertFinished(AsyncCallServer<string, string> asyncCallServer, FakeNativeCall fakeCall, Task finishedTask)
{
Assert.IsTrue(fakeCall.IsDisposed);
Assert.IsTrue(finishedTask.IsCompleted);
Assert.DoesNotThrow(() => finishedTask.Wait());
}
}
}
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