public void Add_triggers_CollectionChanged()
{
var sut = new EventRaisingSet <Person> (_source);
NotifyCollectionChangedEventArgs capturedArgs = default;
void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs args) => capturedArgs = args;
sut.CollectionChanged += OnCollectionChanged;
sut.Add(new Person());
sut.CollectionChanged -= OnCollectionChanged;
Assert.That(capturedArgs, Is.Not.Null);
}
