def test_two_undos(self, door_and_invoker):
door, invoker = door_and_invoker
invoker.activate(door)
invoker.deactivate(door)
for i in range(2):
invoker.undo()
assert not door.locked
def test_lots_of_undos(self, ninjas_and_invoker):
ninjas, invoker = ninjas_and_invoker
for i in range(30):
invoker.activate(ninjas)
invoker.deactivate(ninjas)
for i in range(40):
invoker.undo()
assert not ninjas.armed
def test_door_unlock_and_lock(door_and_invoker):
door, invoker = door_and_invoker
door.lock()
invoker.deactivate(door)
invoker.activate(door)
assert door.locked
def test_basic_door_unlock(door_and_invoker):
door, invoker = door_and_invoker
door.lock()
invoker.deactivate(door)
assert not door.locked
def test_off_undo(self, toaster_and_invoker):
toaster, invoker = toaster_and_invoker
toaster.on()
invoker.deactivate(toaster)
invoker.undo()
assert toaster.is_on
def test_basic_security_disarm(ninjas_and_invoker):
ninjas, invoker = ninjas_and_invoker
ninjas.arm()
invoker.deactivate(ninjas)
assert not ninjas.armed
def test_basic_appliance_off(toaster_and_invoker):
toaster, invoker = toaster_and_invoker
toaster.on()
invoker.deactivate(toaster)
assert not toaster.is_on