nameServiceClient.getByName("");
        }, "Should throw UnknownHostException for empty hostname");
    }

    @Test
    @DisplayName("Should handle localhost in getByName")
    void testGetByNameWithLocalhost() throws UnknownHostException {
        // When
        Address address = nameServiceClient.getByName("localhost");

        // Then
        assertNotNull(address, "Should return address for localhost");