From 700535325748ac547903d3c791032d4ce651a59a Mon Sep 17 00:00:00 2001
From: Luke Bakken <luke@bakken.io>
Date: Fri, 31 May 2024 14:38:20 -0700
Subject: [PATCH] Demonstrate that #1038 is fixed

Fixes #1038
---
 .../TestAsyncEventingBasicConsumer.cs         | 110 ++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 projects/Test/Integration/TestAsyncEventingBasicConsumer.cs

diff --git a/projects/Test/Integration/TestAsyncEventingBasicConsumer.cs b/projects/Test/Integration/TestAsyncEventingBasicConsumer.cs
new file mode 100644
index 0000000000..4c07f9bd2d
--- /dev/null
+++ b/projects/Test/Integration/TestAsyncEventingBasicConsumer.cs
@@ -0,0 +1,110 @@
+// This source code is dual-licensed under the Apache License, version
+// 2.0, and the Mozilla Public License, version 2.0.
+//
+// The APL v2.0:
+//
+//---------------------------------------------------------------------------
+//   Copyright (c) 2007-2020 VMware, Inc.
+//
+//   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
+//
+//       https://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.
+//---------------------------------------------------------------------------
+//
+// The MPL v2.0:
+//
+//---------------------------------------------------------------------------
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+//
+//  Copyright (c) 2007-2020 VMware, Inc.  All rights reserved.
+//---------------------------------------------------------------------------
+
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using RabbitMQ.Client;
+using RabbitMQ.Client.Events;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace Test.Integration
+{
+    public class TestAsyncEventingBasicConsumer : IntegrationFixture
+    {
+        private readonly CancellationTokenSource _cts = new CancellationTokenSource(ShortSpan);
+        private readonly CancellationTokenRegistration _ctr;
+        private readonly TaskCompletionSource<bool> _onCallbackExceptionTcs =
+            new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);
+        private readonly TaskCompletionSource<bool> _onReceivedTcs =
+            new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);
+
+        public TestAsyncEventingBasicConsumer(ITestOutputHelper output)
+            : base(output, dispatchConsumersAsync: true, consumerDispatchConcurrency: 2)
+        {
+            _ctr = _cts.Token.Register(OnTokenCanceled);
+        }
+
+        public override Task DisposeAsync()
+        {
+            _ctr.Dispose();
+            _cts.Dispose();
+            return base.DisposeAsync();
+        }
+
+        private void OnTokenCanceled()
+        {
+            _onCallbackExceptionTcs.TrySetCanceled();
+            _onReceivedTcs.TrySetCanceled();
+        }
+
+        private void ConsumerChannelOnCallbackException(object sender, CallbackExceptionEventArgs e)
+        {
+            _onCallbackExceptionTcs.TrySetResult(true);
+        }
+
+        private Task AsyncConsumerOnReceived(object sender, BasicDeliverEventArgs @event)
+        {
+            _onReceivedTcs.TrySetResult(true);
+            throw new Exception("from async subscriber");
+        }
+
+        [Fact]
+        public async Task TestAsyncEventingBasicConsumer_GH1038()
+        {
+            string exchangeName = GenerateExchangeName();
+            string queueName = GenerateQueueName();
+            string routingKey = string.Empty;
+
+            await _channel.ExchangeDeclareAsync(exchangeName, ExchangeType.Direct);
+            await _channel.QueueDeclareAsync(queueName, false, false, true, null);
+            await _channel.QueueBindAsync(queueName, exchangeName, routingKey, null);
+
+            _channel.CallbackException += ConsumerChannelOnCallbackException;
+
+            //async subscriber
+            var consumer = new AsyncEventingBasicConsumer(_channel);
+            consumer.Received += AsyncConsumerOnReceived;
+            await _channel.BasicConsumeAsync(queueName, false, consumer);
+
+            //publisher
+            using IChannel publisherChannel = await _conn.CreateChannelAsync();
+            byte[] messageBodyBytes = System.Text.Encoding.UTF8.GetBytes("Hello, world!");
+            var props = new BasicProperties();
+            await publisherChannel.BasicPublishAsync(exchangeName, "", props, messageBodyBytes);
+
+            await Task.WhenAll(_onReceivedTcs.Task, _onCallbackExceptionTcs.Task);
+            Assert.True(await _onReceivedTcs.Task);
+            Assert.True(await _onCallbackExceptionTcs.Task);
+        }
+    }
+}