Ben Finney wrote:
Ethan Furman <et...@stoneleaf.us> writes:
>> Ben Finney wrote:
>>>
How can composition add test cases detectable by Python's ‘unittest’?
>>
Metaclasses, if's that an option...
[…]
or a class decorator
[…]
Both interesting, thank you. But Python 3 isn't an option for several
projects where I'd like to use this.
Well, I'm sure there's a way to do it -- alas, I lack the time to find
it either in the docs, archives, or by experimentation.
What I did find is that if you have your functions in modules, instead
of in classes, it works fine in Python 2.6+.
8<---spam.py-------------------------------------------------------
def test_spam_01(self):
print('testing spam_01')
def test_spam_02(self):
print('testing spam_02')
8<-----------------------------------------------------------------
8<---eggs.py-------------------------------------------------------
def test_eggs_01(self):
print('testing eggs_01')
def test_eggs_02(self):
print('testing eggs_02')
8<-----------------------------------------------------------------
8<---test_compose.py-----------------------------------------------
import unittest
class Compose(object): # 2.6-2.7, functions must be in modules
def __init__(self, *parts):
self.parts = parts
def __call__(self, func):
for part in self.parts:
for attr in dir(part):
if attr[:2] == attr[-2:] == '__':
continue
if getattr(cls, attr, None):
raise AttributeError(
"%s already exists in %s" % (attr, cls))
setattr(func, attr, getattr(part, attr))
return func
@Compose(spam, eggs)
class TestAll(unittest.TestCase):
def setUp(self):
print('Setting up...')
def tearDown(self):
print('Tearing down...')
def test_something(self):
print('testing something')
if __name__ == '__main__':
unittest.main()
8<---test_compose.py-----------------------------------------------
Compose now has rudimentary error checking, and if can live with your
extras living in their own .py files, this might work for you.
~Ethan~
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