def test_setsessionclass_and_initsession(self, testdir):
from py.__.test.config import Config
config = Config()
class Session1:
def __init__(self, config):
self.config = config
config.setsessionclass(Session1)
session = config.initsession()
assert isinstance(session, Session1)
assert session.config is config
py.test.raises(ValueError, "config.setsessionclass(Session1)")
