def test_invalid_negativ(self):
     with self.assertRaises(ValueError):
         brightness(-1)
 def test_invalid_string(self):
     with self.assertRaises(ValueError):
         brightness('lol')
 def test_valid_float_cut(self):
     self.assertEqual(brightness(2.9), 2)
 def test_invalid_max(self):
     with self.assertRaises(ValueError):
         brightness(255)
 def test_valid_max_string(self):
     self.assertEqual(brightness('254'), 254)
 def test_valid_min_string(self):
     self.assertEqual(brightness('1'), 1)
 def test_valid_max(self):
     self.assertEqual(brightness(254), 254)
 def test_valid_normal(self):
     self.assertEqual(brightness(100), 100)
 def test_valid_min(self):
     self.assertEqual(brightness(1), 1)