>>> from should_dsl import *

>>> 1 |should| be_into([1,2,3])

>>> 1 |should_not| be_into([1,2,3])
Traceback (most recent call last):
    ...
ShouldNotSatisfied: 1 is into [1, 2, 3]

>>> 5 |should_not| be_into([1,2,3])

>>> 'a' |should| be_into(['b', 'c'])
Traceback (most recent call last):
    ...
ShouldNotSatisfied: 'a' is not into ['b', 'c']

