def test_invalid_string(self):
     with self.assertRaises(ValueError):
         saturation('lol')
 def test_valid_float_cut(self):
     self.assertEqual(saturation(2.9), 2)
 def test_invalid_max(self):
     with self.assertRaises(ValueError):
         saturation(255)
 def test_valid_max_string(self):
     self.assertEqual(saturation('254'), 254)
 def test_valid_min_string(self):
     self.assertEqual(saturation('0'), 0)
 def test_valid_max(self):
     self.assertEqual(saturation(254), 254)
 def test_valid_normal(self):
     self.assertEqual(saturation(100), 100)
 def test_valid_min(self):
     self.assertEqual(saturation(0), 0)