def test_move_dir(self):
grid = ' \n \n '
gw = GridWorld(grid)
start = (1,1)
# N, E, S, W
tests = [(0, (1,0)), (1, (2,1)), (2, (1,2)), (3, (0,1))]
for dir, end in tests:
e, _, _ = gw.move_dir(start, dir)
self.assertEqual(e, end)
