>>> from should_dsl import *

>>> 'spec' is not 'SPEC' |should_not_be| False
True

>>> True |should_be| False
Traceback (most recent call last):
    ...
ShouldNotSatisfied: True is not False

>>> False |should_not_be| False
Traceback (most recent call last):
    ...
ShouldNotSatisfied: False is False
