added tests

Tests/MQTTnet.AspNetCore.Tests/MqttPacketSerializerTests.cs

@@ -0,0 +1,17 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using MQTTnet.Core.Tests;
+using MQTTnet.Serializer;
+
+namespace MQTTnet.AspNetCore.Tests
+{
+    [TestClass]
+    public class MqttPacketSerializerTestsWithSpanBasedReader : MqttPacketSerializerTests
+    {
+        protected override IPacketBodyReader ReaderFactory(byte[] data)
+        {
+            var result = new SpanBasedMqttPacketBodyReader();
+            result.SetBuffer(data);
+            return result;
+        }
+    }
+}

Tests/MQTTnet.Core.Tests/MqttPacketSerializer_Tests.cs

@@ -528,7 +528,12 @@ namespace MQTTnet.Tests
             Assert.AreEqual(expectedBase64Value, Convert.ToBase64String(Join(data)));
         }
 
-        private static void DeserializeAndCompare(MqttBasePacket packet, string expectedBase64Value, MqttProtocolVersion protocolVersion = MqttProtocolVersion.V311)
+        protected virtual IMqttPacketBodyReader ReaderFactory(byte[] data)
+        {
+            return new MqttPacketBodyReader(data, 0, data.Length);
+        }
+
+        private void DeserializeAndCompare(MqttBasePacket packet, string expectedBase64Value, MqttProtocolVersion protocolVersion = MqttProtocolVersion.V311)
         {
             IMqttPacketFormatter serializer;
             if (protocolVersion == MqttProtocolVersion.V311)