Ooh! Wait! I found another method that is similar in style and
appears to work ...
class TestFileTags(unittest.TestCase):
pass
for test_name, file, key, value in list_of_tests:
def test_func(self):
self.assertEqual(file.tags[key], value)
setattr(TestFileTags, test_name, test_func)
I'm not sure if it is the *best* or *right* way to do it, but it does the trick!
Damon
On Thu, May 6, 2010 at 1:53 PM, Damon Timm <damontimm at gmail.com> wrote:
> Hi Lie -
>
> Thanks for that idea -- I tried it but am getting an error. I read a
> little about the __dict__ feature but couldn't figure it. I am going
> to keep searching around for how to dynamically add methods to a class
> ... here is the error and then the code.
>
> Thanks.
>
> # ERROR:
>
> $ python tests_tagging.py
> Traceback (most recent call last):
> File "tests_tagging.py", line 25, in <module>
> class TestFileTags(unittest.TestCase):
> File "tests_tagging.py", line 31, in TestFileTags
> __dict__[test] = new_test
> NameError: name '__dict__' is not defined
>
> # CODE:
>
> import unittest
> from mlc.filetypes import *
>
> TAG_VALUES = (
> ('title', 'Christmas Waltz'),
> ('artist', 'Damon Timm'),
> ('album', 'Homemade'),
> )
>
> FILES = (
> FLACFile('data/lossless/01 - Christmas Waltz.flac'),
> MP3File('data/lossy/04 - Christmas Waltz (MP3-79).mp3'),
> OGGFile('data/lossy/01 - Christmas Waltz (OGG-77).ogg'),
> MP4File('data/lossy/06 - Christmas Waltz (M4A-64).m4a'),
> )
>
> list_of_tests = []
> for file in FILES:
> for k, v in TAG_VALUES:
> test_name = 'test_' + file.exts[0] + '_' + k
> list_of_tests.append((test_name, file, k, v))
>
> class TestFileTags(unittest.TestCase):
>
> for test in list_of_tests:
> def new_test(self):
> self.assertEqual(test[1].tags[test[2]],test[3])
>
> __dict__[test] = new_test
>
> if __name__ == '__main__':
> unittest.main()
>
>
> On Thu, May 6, 2010 at 12:26 PM, Lie Ryan <lie.1296 at gmail.com> wrote:
>> On 05/06/10 10:37, Damon Timm wrote:
>>> Hi - am trying to write some unit tests for my little python project -
>>> I had been hard coding them when necessary here or there but I figured
>>> it was time to try and learn how to do it properly.
>>> <snip>
>>> This test works, however, it only runs as *one* test (which either
>>> fails or passes) and I want it to run as 12 different tests (three for
>>> each file type) and be able to see which key is failing for which file
>>> type. I know I could write them all out individually but that seems
>>> unnecessary.
>>
>> One way to do what you wanted is to harness python's dynamicity and
>> generate the methods by their names:
>>
>> class TestFiles(unittest.TestCase):
>> for methname, case in somedict:
>> def test(self):
>> ...
>> __dict__[methname] = test
>>
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>