[tests] Stop counting pickle bytes in ResultSet tests Between python 2's pickle and cPickle implementations, the various protocol versions added in python 3, the length of the pickled string is completely unpredictable. Instead, do a simple round trip and test a few attributes.

from os.path import join
assert __file__.endswith(join('scripts', 'script2.py')), __file__
assert '__main__' == __name__, __name__
assert ['-v'] == __args__, __args__