Initial commit

source/test/MyTelegram.Schema.Tests/Serializer/Int256SerializerTests.cs

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+using System.Buffers;
+using MyTelegram.Schema.Extensions;
+
+namespace MyTelegram.Schema.Serializer;
+
+
+
+public class Int256SerializerTests
+{
+    [Fact]
+    public void DeserializeTest()
+    {
+        var expectedBytes = "6B5DB1FB13049F1CBC9FE635C66786F220BF979222CF064F1A59DD0C23971293".ToBytes();
+        //var stream = new MemoryStream(expectedBytes);
+        //var br = new BinaryReader(stream);
+        ReadOnlyMemory<byte> buffer = expectedBytes;
+        var serializer = CreateSerializer();
+
+        var actualBytes = serializer.Deserialize(ref buffer);
+
+        actualBytes.ShouldBeEquivalentTo(expectedBytes);
+    }
+
+    [Fact]
+    public void SerializeTest()
+    {
+        var expectedBytes = "6B5DB1FB13049F1CBC9FE635C66786F220BF979222CF064F1A59DD0C23971293".ToBytes();
+        //var stream = new MemoryStream();
+        //var bw = new BinaryWriter(stream);
+        using var writer = new ArrayPoolBufferWriter<byte>();
+        var serializer = CreateSerializer();
+
+        serializer.Serialize(expectedBytes, writer);
+
+        writer.WrittenSpan.ToArray().ShouldBeEquivalentTo(expectedBytes);
+    }
+
+    private Int256Serializer CreateSerializer() => new();
+}