public void When_Dictionary_UpdateItem_RetunsSameValue_Then_DictionaryNotUpdated()
{
var key = new object();
// **I**ImmutableDictionary
IImmutableDictionary <object, object> dictionary_interface = ImmutableDictionary <object, object> .Empty.Add(key, new object());
var dictionary_interface_capture = dictionary_interface;
Transactional.UpdateItem(ref dictionary_interface, key, (k, v) => v);
Assert.AreSame(dictionary_interface_capture, dictionary_interface);
// ImmutableDictionary
ImmutableDictionary <object, object> dictionary_implementation = ImmutableDictionary <object, object> .Empty.Add(key, new object());
var dictionary_implementation_capture = dictionary_implementation;
Transactional.TryUpdateItem(ref dictionary_implementation, key, (k, v) => v);
Assert.AreSame(dictionary_implementation_capture, dictionary_implementation);
// ImmutableSortedDictionary
ImmutableSortedDictionary <object, object> dictionary_sorted = ImmutableSortedDictionary <object, object> .Empty.Add(key, new object());
var dictionary_sorted_capture = dictionary_sorted;
Transactional.TryUpdateItem(ref dictionary_sorted, key, (k, v) => v);
Assert.AreSame(dictionary_sorted_capture, dictionary_sorted);
}