def test_quantifier_syntax():
b = BDD()
[b.add_var(var) for var in ['x', 'y']]
# constants
u = b.add_expr('\E x: True')
assert u == b.true, u
u = b.add_expr('\E x, y: True')
assert u == b.true, u
u = b.add_expr('\E x: False')
assert u == b.false, u
u = b.add_expr('\A x: True')
assert u == b.true, u
u = b.add_expr('\A x: False')
assert u == b.false, u
u = b.add_expr('\A x, y: False')
assert u == b.false, u
# variables
u = b.add_expr('\E x: x')
assert u == b.true, u
u = b.add_expr('\A x: x')
assert u == b.false, u
u = b.add_expr('\E x, y: x')
assert u == b.true, u
u = b.add_expr('\E x, y: y')
assert u == b.true, u
u = b.add_expr('\A x: y')
assert u == b.var('y'), u
u = b.add_expr('\A x: ! y')
u_ = b.apply('not', b.var('y'))
assert u == u_, (u, u_)
def test_quantifier_syntax():
b = BDD()
[b.add_var(var) for var in ['x', 'y']]
# constants
u = b.add_expr('\E x: True')
assert u == b.true, u
u = b.add_expr('\E x, y: True')
assert u == b.true, u
u = b.add_expr('\E x: False')
assert u == b.false, u
u = b.add_expr('\A x: True')
assert u == b.true, u
u = b.add_expr('\A x: False')
assert u == b.false, u
u = b.add_expr('\A x, y: False')
assert u == b.false, u
# variables
u = b.add_expr('\E x: x')
assert u == b.true, u
u = b.add_expr('\A x: x')
assert u == b.false, u
u = b.add_expr('\E x, y: x')
assert u == b.true, u
u = b.add_expr('\E x, y: y')
assert u == b.true, u
u = b.add_expr('\A x: y')
assert u == b.var('y'), u
u = b.add_expr('\A x: ! y')
u_ = b.apply('not', b.var('y'))
assert u == u_, (u, u_)
def test_var():
b = BDD()
with nt.assert_raises(AssertionError):
b.var('x')
j = b.add_var('x')
u = b.var('x')
assert u > 0, u
level, low, high = b.succ(u)
assert level == j, (level, j)
assert low == b.false, low
assert high == b.true, high