def test_exec_pplan_create_with_one_undetermined_var(self):
v = Variable("v", 1, self.cs)
cn = Constraint(lambda x: x == 5, Strength.STRONG, v, Method([], v, lambda: 5))
self.cs.add_constraint(cn)
v.determined_by = None
self.cs.exec_roots = [v]
self.assertEqual([cn], self.cs.exec_pplan_create())
