def test_directionality1(self):
e = Elevator(ElevatorLogic())
e.call(2, DOWN)
e.select_floor(5)
e.run_until_stopped()
self.assertEqual(e._current_floor, 5)
e.run_until_stopped()
self.assertEqual(e._current_floor, 2)
def test_changing_direction2(self):
'''
If nobody wants to go further up though, the elevator can turn around.
'''
e = Elevator(ElevatorLogic())
e.call(2, DOWN)
e.call(4, UP)
e.run_until_stopped()
self.assertEqual(e._current_floor, 4)
e.run_until_stopped()
self.assertEqual(e._current_floor, 2)
def test_changing_direction3(self):
'''
If the elevator is called in both directions at that floor, it must
wait once for each direction. You may have seen this too. Some
elevators will close their doors and reopen them to indicate that
they have changed direction.
'''
e = Elevator(ElevatorLogic())
e.select_floor(5)
e.call(5, UP)
e.call(5, DOWN)
e.run_until_stopped()
self.assertEqual(e._current_floor, 5)
# Here, the elevator considers itself to be going up, as it favors
# continuing in the direction it came from.
e.select_floor(4) # ignored
e.run_until_stopped()
self.assertEqual(e._current_floor, 5)
# Since nothing caused the elevator to move further up, it now waits
# for requests that cause it to move down.
e.select_floor(6) # ignored
e.run_until_stopped()
self.assertEqual(e._current_floor, 5)
# Since nothing caused the elevator to move down, the elevator now
# considers itself idle. It can move in either direction.
e.select_floor(6)
e.run_until_stopped()
self.assertEqual(e._current_floor, 6)
def test_directionality2(self):
e = Elevator(ElevatorLogic())
e.select_floor(3)
e.select_floor(5)
e.run_until_stopped()
self.assertEqual(e._current_floor, 3)
e.select_floor(2) # ignored
e.run_until_stopped()
self.assertEqual(e._current_floor, 5)
e.run_until_stopped() # nothing happens, because e.select_floor(2) was ignored
self.assertEqual(e._current_floor, 5)
e.select_floor(2)
e.run_until_stopped()
self.assertEqual(e._current_floor, 2)
def test_basic_usage(self):
e = Elevator(ElevatorLogic())
self.assertEqual(e._current_floor, 1)
e.call(5, DOWN)
e.run_until_stopped()
self.assertEqual(e._current_floor, 5)
e.select_floor(1)
e.call(3, DOWN)
e.run_until_stopped()
self.assertEqual(e._current_floor, 3)
e.run_until_stopped()
self.assertEqual(e._current_floor, 1)
def test_changing_direction1(self):
'''
The process of switching directions is a bit tricky. Normally, if an
elevator going up stops at a floor and there are no more requests at
higher floors, the elevator is free to switch directions right away.
However, if the elevator was called to that floor by a user indicating
that she wants to go up, the elevator is bound to consider itself
going up.
'''
e = Elevator(ElevatorLogic())
e.call(2, DOWN)
e.call(4, UP)
e.run_until_stopped()
self.assertEqual(e._current_floor, 4)
e.select_floor(5)
e.run_until_stopped()
self.assertEqual(e._current_floor, 5)
e.run_until_stopped()
self.assertEqual(e._current_floor, 2)
