Function create_header_with_extension

block/src/qcow/mod.rs:2560–2586

Helper to create a test file with header extensions

(ext_type: u32, ext_data: &[u8])

    /// Helper to create a test file with header extensions
    fn create_header_with_extension(ext_type: u32, ext_data: &[u8]) -> (RawFile, QcowHeader) {
        let header = QcowHeader::create_for_size_and_path(3, 0x10_0000, None)
            .expect("Failed to create header.");

        let mut disk_file: RawFile = RawFile::new(TempFile::new().unwrap().into_file(), false);
        header.write_to(&mut disk_file).unwrap();

        // Write extension
        disk_file
            .seek(SeekFrom::Start(header.header_size as u64))
            .unwrap();
        u32::write_be(&mut disk_file, ext_type).unwrap();
        u32::write_be(&mut disk_file, ext_data.len() as u32).unwrap();
        disk_file.write_all(ext_data).unwrap();

        // Add padding to 8-byte boundary
        let padding = (8 - (ext_data.len() % 8)) % 8;
        if padding > 0 {
            disk_file.write_all(&vec![0u8; padding]).unwrap();
        }

        u32::write_be(&mut disk_file, HEADER_EXT_END).unwrap();

        disk_file.rewind().unwrap();

        (disk_file, header)
    }

    #[test]
    fn read_header_extensions_unknown_extension() {