def test_move_slides_along_the_wall():
left_side = (0, 1)
assert move(left_side, NW) == (0, 0)
assert move(left_side, SW) == (0, 2)
left_side = (16, 1)
assert move(left_side, NE) == (16, 0)
assert move(left_side, SE) == (16, 2)
def test_move_refuses_bad_position():
any_direction = Direction(dx=0, dy=1)
with pytest.raises(AssertionError):
move((-1, 0), any_direction)
with pytest.raises(AssertionError):
move((200, 0), any_direction)
with pytest.raises(AssertionError):
move((0, -10), any_direction)
with pytest.raises(AssertionError):
move((0, 300), any_direction)
def test_move():
assert move((8, 4), NW) == (7, 3)
assert move((8, 4), NE) == (9, 3)
assert move((8, 4), SW) == (7, 5)
assert move((8, 4), SE) == (9, 5)
def test_move_in_corners():
assert move((0, 0), NW) == (0, 0)
assert move((16, 0), NE) == (16, 0)
assert move((0, 8), SW) == (0, 8)
assert move((16, 8), SE) == (16, 8)
