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            int written = resp.writeBytesWireFormat(buffer, index);

            // Assert
            assertEquals(0, written, "Should report 0 bytes written");
            assertArrayEquals(original, buffer, "Buffer must remain unchanged");
        }

        @Test
        @DisplayName("Handles null destination without throwing and returns 0")
        void allowsNullBuffer() {
            // Arrange

        assertNotNull(refDomainList.domains);
        assertEquals(2, refDomainList.domains.length);
        assertNotNull(refDomainList.domains[0]);
        assertNotNull(refDomainList.domains[1]);
        // Cannot verify decode on non-mock objects - they are created by decode
        // Just verify they were created
        assertNotNull(refDomainList.domains[0]);
        assertNotNull(refDomainList.domains[1]);
    }

 * </ul>
 *
 * The buffer is created with enough capacity for a 64‑bit value.
 */
@ExtendWith(MockitoExtension.class)
public class NdrHyperTest {

    /**
     * Tests a simple round‑trip encode → decode retains the original value.
     */
    @Test
    @DisplayName("Basic round‑trip for a fixed value")
    public void testEncodeRoundTrip() throws NdrException {
        final long original = 0x1122334455667788L;