En Sat, 28 Feb 2009 15:35:47 -0200, Yuan HOng <hongyuan1...@gmail.com>
escribió:
In my project I have several date related methods which I want tested for
correctness. The functions use date.today() in several places. Since this
could change every time I run the test, I hope to find someway to fake a
date.today.
For illustration lets say I have a function:
from datetime import date
def today_is_2009():
return date.today().year == 2009
To test this I would like to write test function like:
def test_today_is_2009():
set_today(date(2008, 12, 31))
assert today_is_2009() == False
set_today(date(2009,1,1))
assert today_is_2009() == True
Instead of trying to inject a fake date, you could rewrite the function to
take a date argument:
def today_is_2009(today=None):
if today is None:
today = date.today()
return today.year == 2009
Then, tests should pass a known date. This approach has a drawback -- you
don't test the case when no argument is given.
Another way is to use a fake date class, or a fake datetime module. Google
"python mock object"
--
Gabriel Genellina
--
http://mail.python.org/mailman/listinfo/python-list
