[issue18266] Fix test discovery for test_largefile.py

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

There is other problem with test_largefile. It not allows running only selected tests. I.e.

./python -m test.regrtest -v -m test_lseek test_largefile

Looks as test_largefile was suboptimal converted to unittest.

----------
nosy: +facundobatista, giampaolo.rodola

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18266>
_______________________________________