assertArrayEquals(testFileId, copiedFileId);
    }

    @Test
    @DisplayName("writeBytesWireFormat with null file ID should handle gracefully")
    void testWriteBytesWireFormatWithNullFileId() {
        Smb2FlushRequest requestWithNull = new Smb2FlushRequest(mockConfig, null);
        byte[] buffer = new byte[256];

        // Should throw NullPointerException when trying to copy null array

        assertEquals(testFlags, SMBUtil.readInt2(buffer, 2));
    }

    @Test
    @DisplayName("writeBytesWireFormat with null file ID should handle gracefully")
    void testWriteBytesWireFormatWithNullFileId() {
        Smb2CloseRequest requestWithNull = new Smb2CloseRequest(mockConfig, null, testFileName);
        byte[] buffer = new byte[256];