v4.0.0 (#1357)

Source/MQTTnet.Tests/Mockups/TestApplicationMessageReceivedHandler.cs

@@ -0,0 +1,52 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using MQTTnet.Client;
+using MQTTnet.Implementations;
+
+namespace MQTTnet.Tests.Mockups
+{
+    public sealed class TestApplicationMessageReceivedHandler
+    {
+        readonly List<MqttApplicationMessageReceivedEventArgs> _receivedEventArgs = new List<MqttApplicationMessageReceivedEventArgs>();
+
+        public TestApplicationMessageReceivedHandler(MqttClient mqttClient)
+        {
+            mqttClient.ApplicationMessageReceivedAsync += MqttClientOnApplicationMessageReceivedAsync;
+        }
+
+        public List<MqttApplicationMessageReceivedEventArgs> ReceivedEventArgs
+        {
+            get
+            {
+                lock (_receivedEventArgs)
+                {
+                    return _receivedEventArgs.ToList();
+                }
+            }
+        }
+
+        public void AssertReceivedCountEquals(int expectedCount)
+        {
+            lock (_receivedEventArgs)
+            {
+                Assert.AreEqual(expectedCount, _receivedEventArgs.Count);
+            }
+        }
+
+        Task MqttClientOnApplicationMessageReceivedAsync(MqttApplicationMessageReceivedEventArgs eventArgs)
+        {
+            lock (_receivedEventArgs)
+            {
+                _receivedEventArgs.Add(eventArgs);
+            }
+
+            return PlatformAbstractionLayer.CompletedTask;
+        }
+    }
+}