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)