Oleg Paraschenko wrote:
> Hello,
>
> I decided to re-use functionality of "unittest" module for my purposes.
> More precisely, I have a list of folders. For each folder, code should
> enter to the folder, execute a command and assert the output. It's
> reasonable to use "unittest" here, but the problem is that "unittest"
> doesn't support (== I haven't found how) dynamic creation of tests.
>
> I thought it would be very easy, but due to lack of closures in Python
> (more precisely, closures do exist, but they are counter-intuitive for
> lisp programmers), I failed. Finally, I found a way using a global
> variable. I exploit the fact that "unittest" uses "cmp" to arrange test
> cases. Therefore, if we have an array of test names and sequential
> number of running the common function, we know the name of the current
> test. Here is a sample code:
>
> ------- <dynamic_unittest.py>
>
> import sys, unittest
> test_names = ['aaa', 'ddd', 'bbb']
> test_names.sort()
> test_index = 0
>
> class DynamicTestCase(unittest.TestCase):
> def one_test(self):
> global test_index
> test_name = test_names[test_index]
> test_index = test_index + 1
> # Ok for 'aaa' and 'bbb', failure for 'ddd'
> assert test_name in ['aaa', 'bbb']
>
> for test_name in test_names:
> func_name = 'test_' + test_name
> setattr(DynamicTestCase, func_name, DynamicTestCase.one_test)
>
> suite = unittest.makeSuite(DynamicTestCase, 'test_')
> if not unittest.TextTestRunner().run(suite).wasSuccessful():
> sys.exit(1)
>
> ------- </dynamic_unittest.py>
>
> I think this code might help others, so I post it to the group.
> Comments are welcome.
Here's what your code might look like with closures:
import sys
import unittest
test_names = ['aaa', 'ddd', 'bbb']
test_names.sort()
class DynamicTestCase(unittest.TestCase):
pass
def make_test(test_name):
def one_test(self):
self.assert_(test_name in ['aaa', 'bbb'])
return one_test
for test_name in test_names:
setattr(DynamicTestCase, 'test_' + test_name, make_test(test_name))
if __name__ == "__main__":
unittest.main()
Peter
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