def test_at_most_zero_small(self):
(a, _b, _c) = self.pos
self.function = a
cardinality = cardnet.at_most(self.function.support, 0)
sat = expr.And(self.function, *cardinality).to_cnf().satisfy_one()
self.assertIsNone(sat)
def test_not_at_most_is_not_equivalent(self):
at_most = expr.exprvar("at_most")
cardinality = cardnet.at_most(self.function.support,
len(self.pos) - 1,
~at_most)
sat = expr.And(self.function, at_most, *cardinality).to_cnf().satisfy_one()
self.assertIsNotNone(sat)
self.assertEqual(sat.get(at_most), 1)
def test_at_most_higher(self):
cardinality = cardnet.at_most(self.function.support,
len(self.pos) + 1)
sat = expr.And(self.function, *cardinality).to_cnf().satisfy_one()
self.assertIsNotNone(sat)
solution = {x: sat.get(x) for x in self.pos}
self.assertEqual(solution, {x: 1 for x in self.pos})
def test_at_most_lower(self):
cardinality = cardnet.at_most(self.function.support,
len(self.pos) - 1)
sat = expr.And(self.function, *cardinality).to_cnf().satisfy_one()
self.assertIsNone(sat)
def test_at_most_zero(self):
cardinality = cardnet.at_most(self.function.support, 0)
sat = expr.And(self.function, *cardinality).to_cnf().satisfy_one()
self.assertIsNone(sat)
def at_most(inputs, p, equivalent=None):
if p == 1: yield from at_most_one(inputs, equivalent)
else: yield from cardnet.at_most(inputs, p, equivalent)
