def test_fermi_poss(self):
posses = bb.update_fermi_possibilities((1, 2, 3), self.possibilities)
assert((4, 5, 6) not in posses)
# assuming [FERMI, FERMI]
assert((1, 2, 6) in posses)
def test_fermi_poss(self):
posses = bb.update_fermi_possibilities((1,), self.possibilities)
assert((4,) not in posses)