def setUp(self):
    self._old_settings = {}
    self._default_settings = (lambda : 0)
    self._from_0_to_1_called = False
    self._from_1_to_2_called = False
    self._merge_called = False
def setUp(self):
    self._old_settings = {}
    self._default_settings = (lambda : 0)
    self._from_0_to_1_called = False
    self._from_1_to_2_called = False
    self._merge_called = False