def test_coordinates_from_single_digit(self):
santa = Santa()
actual = santa._coordinates_from('turn on 0,0 through 0,0')
expected = [0, 0, 0, 0]
self.assertEqual(expected, actual)
def test_coordinates_from_multiple_digit(self):
santa = Santa()
actual = santa._coordinates_from('toggle 900,100 through 999,555')
expected = [900, 100, 999, 555]
self.assertEqual(expected, actual)
