Python Value.on_value_changed примеры использования

Пример #1

def test_change_callback():
    m = Mock()

    v = Value()
    v.on_value_changed(m)

    v.value = 123
    m.assert_called_once_with(123)

Пример #2

def test_change_callback_only():
    m = Mock()

    v = Value()
    v.on_value_changed(m)

    v.set_instantaneous_value(123)
    m.assert_called_once_with(123)
    assert v.value is NoValue