int expectedAligned = (expectedBase + 7) & ~7;
        assertEquals(expectedAligned, size);
    }

    @Test
    @DisplayName("Should write zeros for reserved field")
    void testReservedFieldIsZero() {
        // Given
        Configuration mockConfig = mock(Configuration.class);
        Smb2TreeDisconnectRequest request = new Smb2TreeDisconnectRequest(mockConfig);
        byte[] buffer = new byte[256];