| #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.Diagnostics; |
| using System.Linq; |
| using System.Threading; |
| using System.Threading.Tasks; |
| using Grpc.Core; |
| using Grpc.Core.Internal; |
| using Grpc.Core.Profiling; |
| using Grpc.Core.Utils; |
| using NUnit.Framework; |
| |
| namespace Grpc.Core.Tests |
| { |
| public class CallCancellationTest |
| { |
| const string Host = "127.0.0.1"; |
| |
| MockServiceHelper helper; |
| Server server; |
| Channel channel; |
| |
| [SetUp] |
| public void Init() |
| { |
| helper = new MockServiceHelper(Host); |
| server = helper.GetServer(); |
| server.Start(); |
| channel = helper.GetChannel(); |
| } |
| |
| [TearDown] |
| public void Cleanup() |
| { |
| channel.ShutdownAsync().Wait(); |
| server.ShutdownAsync().Wait(); |
| } |
| |
| [Test] |
| public async Task ClientStreamingCall_CancelAfterBegin() |
| { |
| var barrier = new TaskCompletionSource<object>(); |
| |
| helper.ClientStreamingHandler = new ClientStreamingServerMethod<string, string>(async (requestStream, context) => |
| { |
| barrier.SetResult(null); |
| await requestStream.ToListAsync(); |
| return ""; |
| }); |
| |
| var cts = new CancellationTokenSource(); |
| var call = Calls.AsyncClientStreamingCall(helper.CreateClientStreamingCall(new CallOptions(cancellationToken: cts.Token))); |
| |
| await barrier.Task; // make sure the handler has started. |
| cts.Cancel(); |
| |
| try |
| { |
| // cannot use Assert.ThrowsAsync because it uses Task.Wait and would deadlock. |
| await call.ResponseAsync; |
| Assert.Fail(); |
| } |
| catch (RpcException ex) |
| { |
| Assert.AreEqual(StatusCode.Cancelled, ex.Status.StatusCode); |
| } |
| } |
| |
| [Test] |
| public async Task ClientStreamingCall_ServerSideReadAfterCancelNotificationReturnsNull() |
| { |
| var handlerStartedBarrier = new TaskCompletionSource<object>(); |
| var cancelNotificationReceivedBarrier = new TaskCompletionSource<object>(); |
| var successTcs = new TaskCompletionSource<string>(); |
| |
| helper.ClientStreamingHandler = new ClientStreamingServerMethod<string, string>(async (requestStream, context) => |
| { |
| handlerStartedBarrier.SetResult(null); |
| |
| // wait for cancellation to be delivered. |
| context.CancellationToken.Register(() => cancelNotificationReceivedBarrier.SetResult(null)); |
| await cancelNotificationReceivedBarrier.Task; |
| |
| var moveNextResult = await requestStream.MoveNext(); |
| successTcs.SetResult(!moveNextResult ? "SUCCESS" : "FAIL"); |
| return ""; |
| }); |
| |
| var cts = new CancellationTokenSource(); |
| var call = Calls.AsyncClientStreamingCall(helper.CreateClientStreamingCall(new CallOptions(cancellationToken: cts.Token))); |
| |
| await handlerStartedBarrier.Task; |
| cts.Cancel(); |
| |
| try |
| { |
| await call.ResponseAsync; |
| Assert.Fail(); |
| } |
| catch (RpcException ex) |
| { |
| Assert.AreEqual(StatusCode.Cancelled, ex.Status.StatusCode); |
| } |
| Assert.AreEqual("SUCCESS", await successTcs.Task); |
| } |
| |
| [Test] |
| public async Task ClientStreamingCall_CancelServerSideRead() |
| { |
| helper.ClientStreamingHandler = new ClientStreamingServerMethod<string, string>(async (requestStream, context) => |
| { |
| var cts = new CancellationTokenSource(); |
| var moveNextTask = requestStream.MoveNext(cts.Token); |
| cts.Cancel(); |
| await moveNextTask; |
| return ""; |
| }); |
| |
| var call = Calls.AsyncClientStreamingCall(helper.CreateClientStreamingCall()); |
| try |
| { |
| // cannot use Assert.ThrowsAsync because it uses Task.Wait and would deadlock. |
| await call.ResponseAsync; |
| Assert.Fail(); |
| } |
| catch (RpcException ex) |
| { |
| Assert.AreEqual(StatusCode.Cancelled, ex.Status.StatusCode); |
| } |
| } |
| |
| [Test] |
| public async Task ServerStreamingCall_CancelClientSideRead() |
| { |
| helper.ServerStreamingHandler = new ServerStreamingServerMethod<string, string>(async (request, responseStream, context) => |
| { |
| await responseStream.WriteAsync("abc"); |
| while (!context.CancellationToken.IsCancellationRequested) |
| { |
| await Task.Delay(10); |
| } |
| }); |
| |
| var call = Calls.AsyncServerStreamingCall(helper.CreateServerStreamingCall(), ""); |
| await call.ResponseStream.MoveNext(); |
| Assert.AreEqual("abc", call.ResponseStream.Current); |
| |
| var cts = new CancellationTokenSource(); |
| var moveNextTask = call.ResponseStream.MoveNext(cts.Token); |
| cts.Cancel(); |
| |
| try |
| { |
| // cannot use Assert.ThrowsAsync because it uses Task.Wait and would deadlock. |
| await moveNextTask; |
| Assert.Fail(); |
| } |
| catch (RpcException ex) |
| { |
| Assert.AreEqual(StatusCode.Cancelled, ex.Status.StatusCode); |
| } |
| } |
| } |
| } |