def METHOD_NAME(self):
    assert to_bool('True') is True
    assert to_bool('true') is True
    assert to_bool('False') is False
    assert to_bool('false') is False
    assert to_bool('bla') is False
    assert to_bool('T') is True
    assert to_bool('F') is False
    assert to_bool('t') is True
    assert to_bool('f') is False