buffer.put(new byte[] { 0, 0, 0, 0, 0, 1 }); // IdentifierAuthority
        buffer.putInt(0); // SubAuthority

        // Group SID at offset 40
        buffer.position(40);
        buffer.put((byte) 0x01); // Revision
        buffer.put((byte) 0x01); // SubAuthorityCount
        buffer.put(new byte[] { 0, 0, 0, 0, 0, 2 }); // IdentifierAuthority
        buffer.putInt(0); // SubAuthority

            b[off + 2] = 0x00;
            b[off + 3] = 0x00;
            return 4;
        }).when(raf).read(any(byte[].class), anyInt(), eq(4));
        assertEquals(1.0f, raf.readFloat(), 0.00001);

        // double 1.0 -> 0x3FF0000000000000
        doAnswer(inv -> {
            byte[] b = inv.getArgument(0);
            int off = inv.getArgument(1);
            b[off] = 0x3F;

 * the address in network byte order.
 *
 * <p>Examples of IP addresses and their byte representations:
 *
 * <dl>
 *   <dt>The IPv4 loopback address, {@code "127.0.0.1"}.
 *   <dd>{@code 7f 00 00 01}
 *   <dt>The IPv6 loopback address, {@code "::1"}.
 *   <dd>{@code 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01}
 *   <dt>From the IPv6 reserved documentation prefix ({@code 2001:db8::/32}), {@code "2001:db8::1"}.

 * the address in network byte order.
 *
 * <p>Examples of IP addresses and their byte representations:
 *
 * <dl>
 *   <dt>The IPv4 loopback address, {@code "127.0.0.1"}.
 *   <dd>{@code 7f 00 00 01}
 *   <dt>The IPv6 loopback address, {@code "::1"}.
 *   <dd>{@code 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01}
 *   <dt>From the IPv6 reserved documentation prefix ({@code 2001:db8::/32}), {@code "2001:db8::1"}.

		{"06 k=v\n", "06 k=v\n", "", "", false},
		{"00006 k=v\n", "00006 k=v\n", "", "", false},
		{"000006 k=v\n", "000006 k=v\n", "", "", false},
		{"000000 k=v\n", "000000 k=v\n", "", "", false},
		{"0 k=v\n", "0 k=v\n", "", "", false},
		{"+0000005 x=\n", "+0000005 x=\n", "", "", false},
	}

	for _, v := range vectors {
		key, val, res, err := parsePAXRecord(v.in)

        void testBinaryConstructorAndToByteArray() {
            // Arrange: revision=1, count=2, identAuth zeros except last byte, subauth 10, 20
            byte[] ident = new byte[] { 0, 0, 0, 0, 0, 5 };
            rpc.sid_t st = buildSidT((byte) 1, ident, 10, 20);

            byte[] bytes = SID.toByteArray(st);

            // Act: construct from bytes and re-encode

        .addEqualityGroup(BloomFilter.create(Funnels.byteArrayFunnel(), 100, 0.02))
        .addEqualityGroup(BloomFilter.create(Funnels.byteArrayFunnel(), 200, 0.01))
        .addEqualityGroup(BloomFilter.create(Funnels.byteArrayFunnel(), 200, 0.02))
        .addEqualityGroup(BloomFilter.create(Funnels.unencodedCharsFunnel(), 100, 0.01))

        .addEqualityGroup(BloomFilter.create(Funnels.byteArrayFunnel(), 100, 0.02))
        .addEqualityGroup(BloomFilter.create(Funnels.byteArrayFunnel(), 200, 0.01))
        .addEqualityGroup(BloomFilter.create(Funnels.byteArrayFunnel(), 200, 0.02))
        .addEqualityGroup(BloomFilter.create(Funnels.unencodedCharsFunnel(), 100, 0.01))

        message.setFlags(0);
        message.setFlag(0b0001, true);
        assertEquals(0b0001, message.getFlags(), "Flag 0b0001 should be set.");

        message.setFlag(0b0100, true);
        assertEquals(0b0101, message.getFlags(), "Flag 0b0100 should be added to existing flags.");

        // Test clearing a flag
        message.setFlag(0b0001, false);

    @Test
    void testInternalConstructor() {
        rpc.sid_t rpcSid = new rpc.sid_t();
        rpcSid.revision = 1;
        rpcSid.sub_authority_count = 2;
        rpcSid.identifier_authority = new byte[] { 0, 0, 0, 0, 0, 5 };
        rpcSid.sub_authority = new int[] { 32, 544 };

        SID sid = new SID(rpcSid, SID.SID_TYPE_WKN_GRP, "BUILTIN", "Administrators", false);
        assertEquals(SID.SID_TYPE_WKN_GRP, sid.getType());