using System.IO;
using System.Reflection;

using NUnit.Framework;

using Python.Runtime;

namespace Python.EmbeddingTest.StateSerialization;

public class MethodSerialization
{
 [Test]
 public void GenericRoundtrip()
 {
 var method = typeof(MethodTestHost).GetMethod(nameof(MethodTestHost.Generic));
 var maybeMethod = new MaybeMethodBase<MethodBase>(method);
 var restored = SerializationRoundtrip(maybeMethod);
 Assert.IsTrue(restored.Valid);
 Assert.AreEqual(method, restored.Value);
 }

 [Test]
 public void ConstrctorRoundtrip()
 {
 var ctor = typeof(MethodTestHost).GetConstructor(new[] { typeof(int) });
 var maybeConstructor = new MaybeMethodBase<MethodBase>(ctor);
 var restored = SerializationRoundtrip(maybeConstructor);
 Assert.IsTrue(restored.Valid);
 Assert.AreEqual(ctor, restored.Value);
 }

 static T SerializationRoundtrip<T>(T item)
 {
 using var buf = new MemoryStream();
 var formatter = RuntimeData.CreateFormatter();
 formatter.Serialize(buf, item);
 buf.Position = 0;
 return (T)formatter.Deserialize(buf);
 }
}

public class MethodTestHost
{
 public MethodTestHost(int _) { }
 public void Generic<T>(T item, T[] array, ref T @ref) { }
}