v4.0.0 (#1357)

Source/MQTTnet.AspNetCore.Tests/Mockups/MemoryOwner.cs

@@ -0,0 +1,37 @@
+// 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;
+using System.Buffers;
+
+namespace MQTTnet.AspNetCore.Tests.Mockups
+{
+    public class MemoryOwner : IMemoryOwner<byte>
+    {
+        private readonly byte[] _raw;
+
+        public MemoryOwner(int size)
+        {
+            if (size <= 0)
+            {
+                size = 1024;
+            }
+
+            if (size > 4096)
+            {
+                size = 4096;
+            }
+
+            _raw = ArrayPool<byte>.Shared.Rent(size);
+            Memory = _raw;
+        }
+
+        public void Dispose()
+        {
+            ArrayPool<byte>.Shared.Return(_raw);
+        }
+
+        public Memory<byte> Memory { get; }
+    }
+}