def test_check_phone_number_invalid_string_expected_False(self):
        string = "kristina_mironenko"

        actual = Validator.check_phone_number(string)
        expected = False

        self.assertEqual(actual, expected)
    def test_check_phone_number_valid_string_expected_True(self):
        string = "80445789865"

        actual = Validator.check_phone_number(string)
        expected = True

        self.assertEqual(actual, expected)
    def test_check_phone_number(self, input_string, expected):

        actual = Validator.check_phone_number(input_string)

        self.assertEqual(actual, expected)