def test_update():
order = Order(price=10, volume=100, side=OrderSide.BUY)
level = Level(orders=[order])
assert level.volume() == 100
order.update_volume(volume=50)
level.update(order=order)
assert level.volume() == 50
def test_update_level():
order = Order(price=100.0, volume=10.0, side=OrderSide.BUY, id="1")
ladder = TestStubs.ladder(reverse=True, orders=[order])
order.update_volume(volume=20.0)
ladder.update(order)
assert ladder.levels[0].volume() == 20
def test_update_volume():
order = Order(price=100.0, volume=10.0, side=OrderSide.BUY)
order.update_volume(volume=5.0)
assert order.volume == 5.0
