public void BindingContext_Count_GetWithNullWeakReferenceTarget_ScrubsWeakRefs()
{
var context = new BindingContext();
var dataSource1 = new DataSource {
Property = 1
};
var dataSource2 = new DataSource {
Property = 2
};
PropertyManager manager1 = Assert.IsAssignableFrom <PropertyManager>(context[dataSource1, "Property"]);
PropertyManager manager2 = Assert.IsAssignableFrom <PropertyManager>(context[dataSource2, "Property"]);
var array = new DictionaryEntry[4];
((ICollection)context).CopyTo(array, 0);
WeakReference reference1 = Assert.IsType <WeakReference>(array.Single(p => ((WeakReference)p.Value).Target == manager1).Value);
WeakReference reference2 = Assert.IsType <WeakReference>(array.Single(p => ((WeakReference)p.Value).Target == manager2).Value);
Assert.Same(manager1, reference1.Target);
Assert.Same(manager2, reference2.Target);
// Simulate a GC by assigning the weak reference to null.
reference1.Target = null;
reference2.Target = null;
// Verify these weak references have been scrubbed.
Assert.Equal(2, ((ICollection)context).Count);
}
