You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
40 lines
1.1 KiB
40 lines
1.1 KiB
5 months ago
|
from sympy.assumptions import ask, Q
|
||
|
|
from sympy.assumptions.assume import assuming, global_assumptions
|
||
|
|
from sympy.abc import x, y
|
||
|
|
|
||
|
|
def test_assuming():
|
||
|
|
with assuming(Q.integer(x)):
|
||
|
|
assert ask(Q.integer(x))
|
||
|
|
assert not ask(Q.integer(x))
|
||
|
|
|
||
|
|
def test_assuming_nested():
|
||
|
|
assert not ask(Q.integer(x))
|
||
|
|
assert not ask(Q.integer(y))
|
||
|
|
with assuming(Q.integer(x)):
|
||
|
|
assert ask(Q.integer(x))
|
||
|
|
assert not ask(Q.integer(y))
|
||
|
|
with assuming(Q.integer(y)):
|
||
|
|
assert ask(Q.integer(x))
|
||
|
|
assert ask(Q.integer(y))
|
||
|
|
assert ask(Q.integer(x))
|
||
|
|
assert not ask(Q.integer(y))
|
||
|
|
assert not ask(Q.integer(x))
|
||
|
|
assert not ask(Q.integer(y))
|
||
|
|
|
||
|
|
def test_finally():
|
||
|
|
try:
|
||
|
|
with assuming(Q.integer(x)):
|
||
|
|
1/0
|
||
|
|
except ZeroDivisionError:
|
||
|
|
pass
|
||
|
|
assert not ask(Q.integer(x))
|
||
|
|
|
||
|
|
def test_remove_safe():
|
||
|
|
global_assumptions.add(Q.integer(x))
|
||
|
|
with assuming():
|
||
|
|
assert ask(Q.integer(x))
|
||
|
|
global_assumptions.remove(Q.integer(x))
|
||
|
|
assert not ask(Q.integer(x))
|
||
|
|
assert ask(Q.integer(x))
|
||
|
|
global_assumptions.clear() # for the benefit of other tests
|