How to test a validator in an abstract class?

Question

Python

There is an abstract class, it has a setter that calls the private validator function. The validator returns False or True, in case of False the setter throws a ValueError exception.
What is the correct way to write a test for this validator?
If it’s more or less clear with checking for invalid data (there is unittest.assertRaises()), then I can’t figure out how to check for correct execution on valid data.

Answer 1

well, what are you? :)

def success_test(self):
    a = ABC()
    a.foo = 10
    self.assertEqual(a.foo, 10)