byte[] data = { 1, 2, 3 };
        int outlen = 5;
        byte[] expanded = PacMac.expandNFold(data, outlen);
        assertNotNull(expanded);
        assertEquals(outlen, expanded.length);

        // Test vectors from RFC 3961 Appendix A.1
        // 64-fold("012345")
        verifyNfold("012345", 8,
                new byte[] { (byte) 0xbe, (byte) 0x07, (byte) 0x26, (byte) 0x31, (byte) 0x27, (byte) 0x6b, (byte) 0x19, (byte) 0x55 });

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 * This structure provides complete allocation details including total allocation units, caller-available free units,
 * actual free allocation units, sectors per allocation unit, and bytes per sector.
 */
public class FileFsFullSizeInformation implements AllocInfo, FileSystemInformation, Decodable {

    private long alloc; // Also handles SmbQueryFSSizeInfo
    private long free;

/**
 * Represents the FILE_FS_SIZE_INFORMATION structure used to query file system size information.
 * This structure provides details about the total allocation units, free allocation units,
 * sectors per allocation unit, and bytes per sector for a file system volume.
 */
public class FileFsSizeInformation implements AllocInfo {

    private long alloc; // Also handles SmbQueryFSSizeInfo
    private long free;
    private int sectPerAlloc;

        writeInt8(2000, buffer, 0); // total allocation units
        writeInt8(1000, buffer, 8); // free allocation units
        writeInt4(8, buffer, 16); // sectors per allocation unit
        writeInt4(4096, buffer, 20); // bytes per sector

        int bytesRead = response.readDataWireFormat(buffer, 0, buffer.length);

        assertEquals(24, bytesRead, "Should read 24 bytes");

/**
 * Represents the SMB_INFO_ALLOCATION information level used in SMB transaction requests.
 * This structure provides allocation information for a file system including total units,
 * free units, sectors per allocation unit, and bytes per sector.
 */
public class SmbInfoAllocation implements AllocInfo {

    /**
     * Default constructor for SMB allocation information.
     */
    public SmbInfoAllocation() {

    void testAs_Enumeration_Success() throws PACDecodingException {
        // Test successful casting from enumeration
        Vector<ASN1Integer> vector = new Vector<>();
        ASN1Integer expected = new ASN1Integer(123);
        vector.add(expected);
        ASN1Integer result = ASN1Util.as(ASN1Integer.class, vector.elements());
        assertSame(expected, result);
    }

    @Test
    void testAs_Enumeration_Failure() {

    @SuppressWarnings("unused")
    @Test
    public void testIterable() throws Exception {
        final Vector<String> vector = new Vector<String>();
        vector.add("a");
        vector.add("b");
        int count = 0;
        for (final String s : iterable(vector.elements())) {
            ++count;
        }
        assertThat(count, is(2));
    }

    /**
     * Test method for

     */
    @Test
    void testConstructorUnknownField() throws IOException {
        ASN1EncodableVector vector = new ASN1EncodableVector();
        vector.add(new DERTaggedObject(99, new DERGeneralString("unknown")));
        DERSequence sequence = new DERSequence(vector);
        byte[] encoded = new DERTaggedObject(false, BERTags.APPLICATION, 1, sequence).getEncoded();