def testRelated(self):
cs = ConstraintSet()
aa1 = cs.new_bool(name="AA1")
aa2 = cs.new_bool(name="AA2")
bb1 = cs.new_bool(name="BB1")
bb2 = cs.new_bool(name="BB2")
cs.add(Operators.OR(aa1, aa2))
cs.add(Operators.OR(bb1, bb2))
self.assertTrue(self.solver.check(cs))
# No BB variables related to AA
self.assertNotIn("BB", cs.related_to(aa1).to_string())
self.assertNotIn("BB", cs.related_to(aa2).to_string())
self.assertNotIn("BB", cs.related_to(aa1 == aa2).to_string())
self.assertNotIn("BB", cs.related_to(aa1 == False).to_string())
# No AA variables related to BB
self.assertNotIn("AA", cs.related_to(bb1).to_string())
self.assertNotIn("AA", cs.related_to(bb2).to_string())
self.assertNotIn("AA", cs.related_to(bb1 == bb2).to_string())
self.assertNotIn("AA", cs.related_to(bb1 == False).to_string())
# Nothing is related to tautologies?
self.assertEqual("", cs.related_to(simplify(bb1 == bb1)).to_string())
# But if the tautollogy can not get simplified we have to ask the solver
# and send in all the other stuff
self.assertNotIn("AA", cs.related_to(bb1 == bb1).to_string())
def test_ITE(self):
cs = ConstraintSet()
a = cs.new_bool()
b = cs.new_bool()
c = cs.new_bool()
cs.add(b == True)
cs.add(c == False)
cs.add(a == Operators.ITE(b == c, b, c))
self.assertTrue(solver.check(cs))
self.assertEqual(solver.get_value(cs, a), False)
def test_simplify_OR(self):
cs = ConstraintSet()
bf = BoolConstant(value=False)
bt = BoolConstant(value=True)
var = cs.new_bool()
cs.add(simplify(Operators.OR(var, var)) == var)
cs.add(simplify(Operators.OR(var, bt)) == bt)
self.assertTrue(self.solver.check(cs))
