def test_invalid_red_value_throws(self):
s = LightSettings()
with self.assertRaises(ValueError):
s.red = -10
with self.assertRaises(ValueError):
s.red = 300
def test_can_serialize_to_json(self):
s = LightSettings()
s.red = 10
jsonstr = s.to_json()
self.assertEquals(jsonstr, '{"red": 10}')
def test_can_set_red(self):
s = LightSettings()
s.red = 10
self.assertEquals(s.red, 10)