def test_copy_bdd_same_indices():
# each va has same index in each `BDD`
bdd = cudd.BDD()
other = cudd.BDD()
assert bdd != other
dvars = ['x', 'y', 'z']
for var in dvars:
bdd.add_var(var)
other.add_var(var)
s = '(x & y) | !z'
u0 = bdd.add_expr(s)
u1 = cudd.copy_bdd(u0, bdd, other)
u2 = cudd.copy_bdd(u1, other, bdd)
# involution
assert u0 == u2, (u0, u2)
# confirm
w = other.add_expr(s)
assert w == u1, (w, u1)
# different nodes
u3 = cudd.copy_bdd(other.true, other, bdd)
assert u3 != u2, (u3, u2)
# same bdd
with assert_raises(AssertionError):
cudd.copy_bdd(u0, bdd, bdd)
del u0, u1, u2, u3, w
def test_copy_bdd_same_indices():
# each va has same index in each `BDD`
bdd = cudd.BDD()
other = cudd.BDD()
assert bdd != other
dvars = ['x', 'y', 'z']
for var in dvars:
bdd.add_var(var)
other.add_var(var)
s = '(x & y) | !z'
u0 = bdd.add_expr(s)
u1 = cudd.copy_bdd(u0, bdd, other)
u2 = cudd.copy_bdd(u1, other, bdd)
# involution
assert u0 == u2, (u0, u2)
# confirm
w = other.add_expr(s)
assert w == u1, (w, u1)
# different nodes
u3 = cudd.copy_bdd(other. True, other, bdd)
assert u3 != u2, (u3, u2)
# same bdd
with assert_raises(AssertionError):
cudd.copy_bdd(u0, bdd, bdd)
del u0, u1, u2, u3, w
def test_copy_bdd_different_indices():
# each var has different index in each `BDD`
bdd = cudd.BDD()
other = cudd.BDD()
assert bdd != other
dvars = ['x', 'y', 'z']
for var in dvars:
bdd.add_var(var)
for var in reversed(dvars):
other.add_var(var)
u0 = bdd.add_expr('(x | !y) & !z')
with assert_raises(AssertionError):
cudd.copy_bdd(u0, bdd, other)
def test_copy_bdd_different_indices():
# each var has different index in each `BDD`
bdd = cudd.BDD()
other = cudd.BDD()
assert bdd != other
dvars = ['x', 'y', 'z']
for var in dvars:
bdd.add_var(var)
for var in reversed(dvars):
other.add_var(var)
u0 = bdd.add_expr('(x | !y) & !z')
with assert_raises(AssertionError):
cudd.copy_bdd(u0, bdd, other)
del u0
def test_copy_bdd_same_indices():
# each va has same index in each `BDD`
bdd = cudd.BDD()
other = cudd.BDD()
assert bdd != other
dvars = ['x', 'y', 'z']
for var in dvars:
bdd.add_var(var)
other.add_var(var)
s = '(x /\ y) \/ ~ z'
u0 = bdd.add_expr(s)
u1 = cudd.copy_bdd(u0, other)
u2 = cudd.copy_bdd(u1, bdd)
# involution
assert u0 == u2, (u0, u2)
# confirm
w = other.add_expr(s)
assert w == u1, (w, u1)
# different nodes
u3 = cudd.copy_bdd(other.true, bdd)
assert u3 != u2, (u3, u2)
def test_copy_bdd_same_indices():
# each va has same index in each `BDD`
bdd = cudd.BDD()
other = cudd.BDD()
assert bdd != other
dvars = ['x', 'y', 'z']
for var in dvars:
bdd.add_var(var)
other.add_var(var)
s = '(x /\ y) \/ ~ z'
u0 = bdd.add_expr(s)
u1 = cudd.copy_bdd(u0, other)
u2 = cudd.copy_bdd(u1, bdd)
# involution
assert u0 == u2, (u0, u2)
# confirm
w = other.add_expr(s)
assert w == u1, (w, u1)
# different nodes
u3 = cudd.copy_bdd(other.true, bdd)
assert u3 != u2, (u3, u2)
def test_copy_bdd_different_order():
bdd = cudd.BDD()
other = cudd.BDD()
assert bdd != other
dvars = ['x', 'y', 'z', 'w']
for index, var in enumerate(dvars):
bdd.add_var(var, index=index)
other.add_var(var, index=index)
# reorder
order = dict(w=0, x=1, y=2, z=3)
cudd.reorder(other, order)
# confirm resultant order
for var in order:
level_ = order[var]
level = other.level_of_var(var)
assert level == level_, (var, level, level_)
# same indices
for var in dvars:
i = bdd._index_of_var[var]
j = other._index_of_var[var]
assert i == j, (i, j)
# but different levels
for var in dvars:
i = bdd.level_of_var(var)
j = other.level_of_var(var)
assert i != j, (i, j)
# copy
s = '(x | !y) & w & (z | !w)'
u0 = bdd.add_expr(s)
u1 = cudd.copy_bdd(u0, bdd, other)
u2 = cudd.copy_bdd(u1, other, bdd)
assert u0 == u2, (u0, u2)
u3 = cudd.copy_bdd(other.false, other, bdd)
assert u3 != u2, (u3, u2)
# verify
w = other.add_expr(s)
assert w == u1, (w, u1)
del u0, u1, u2, u3, w
def test_copy_bdd_different_order():
bdd = cudd.BDD()
other = cudd.BDD()
assert bdd != other
dvars = ['x', 'y', 'z', 'w']
for index, var in enumerate(dvars):
bdd.add_var(var, index=index)
other.add_var(var, index=index)
# reorder
order = dict(w=0, x=1, y=2, z=3)
other.reorder(order)
# confirm resultant order
for var in order:
level_ = order[var]
level = other.level_of_var(var)
assert level == level_, (var, level, level_)
# same indices
for var in dvars:
i = bdd._index_of_var[var]
j = other._index_of_var[var]
assert i == j, (i, j)
# but different levels
for var in dvars:
i = bdd.level_of_var(var)
j = other.level_of_var(var)
assert i != j, (i, j)
# copy
s = '(x \/ ~ y) /\ w /\ (z \/ ~ w)'
u0 = bdd.add_expr(s)
u1 = cudd.copy_bdd(u0, other)
u2 = cudd.copy_bdd(u1, bdd)
assert u0 == u2, (u0, u2)
u3 = cudd.copy_bdd(other.false, bdd)
assert u3 != u2, (u3, u2)
# verify
w = other.add_expr(s)
assert w == u1, (w, u1)