}

    @ParameterizedTest
    @DisplayName("Test valid domains")
    @ValueSource(strings = { "domain", "domain.local", "sub.domain.com", "domain-01", "domain_test" })
    void testValidDomains(String domain) {
        assertDoesNotThrow(() -> InputValidator.validateDomain(domain));
    }

    @Test
    @DisplayName("Test safe integer addition")