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fix-binaryformatter-usage

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Events.cs

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using System;

using System.Diagnostics;

using System.Threading;

using NUnit.Framework;

using Python.Runtime;

namespace Python.EmbeddingTest;

public class Events

{

[OneTimeSetUp]

public void SetUp()

{

PythonEngine.Initialize();

}

[OneTimeTearDown]

public void Dispose()

{

PythonEngine.Shutdown();

}

[Test]

public void UsingDoesNotLeak()

{

using var scope = Py.CreateScope();

scope.Exec(@"

import gc

from Python.EmbeddingTest import ClassWithEventHandler

def event_handler():

pass

for _ in range(2000):

example = ClassWithEventHandler()

example.LeakEvent += event_handler

example.LeakEvent -= event_handler

del example

gc.collect()

");

Runtime.Runtime.TryCollectingGarbage(10);

Assert.AreEqual(0, ClassWithEventHandler.alive);

}

}

public class ClassWithEventHandler

{

internal static int alive;

public event EventHandler LeakEvent;

private Array arr; // dummy array to exacerbate memory leak

public ClassWithEventHandler()

{

Interlocked.Increment(ref alive);

this.arr = new int[800];

}

~ClassWithEventHandler()

{

Interlocked.Decrement(ref alive);

}

}