* @throws PACDecodingException if the PAC is malformed
     */
    @Test
    void testConstructorKerbChecksumHmacMd5() throws IOException, PACDecodingException {
        // Prepare data
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        writeLittleEndianInt(baos, PacSignature.KERB_CHECKSUM_HMAC_MD5);
        byte[] checksum = new byte[16];
        for (int i = 0; i < checksum.length; i++) {
            checksum[i] = (byte) i;

    }

    private void writeLittleEndianInt(ByteArrayOutputStream baos, int value) {
        baos.write(value & 0xFF);
        baos.write((value >> 8) & 0xFF);
        baos.write((value >> 16) & 0xFF);
        baos.write((value >> 24) & 0xFF);
    }

    private void writeLittleEndianLong(ByteArrayOutputStream baos, long value) {
        for (int i = 0; i < 8; i++) {

@NullMarked
final class Platform {
  /** Serializes and deserializes the specified object. */
  @SuppressWarnings("unchecked")
  static <T> T reserialize(T object) {
    checkNotNull(object);
    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    try {
      ObjectOutputStream out = new ObjectOutputStream(bytes);
      out.writeObject(object);
      ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bytes.toByteArray()));

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import org.jspecify.annotations.NullUnmarked;

/**
 * A byte sink for testing that has configurable behavior.
 *
 * @author Colin Decker
 */
@NullUnmarked
public class TestByteSink extends ByteSink implements TestStreamSupplier {

  private final ByteArrayOutputStream bytes = new ByteArrayOutputStream();

    private byte[] createGssApiWrapper(ASN1ObjectIdentifier oid, byte[] data) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        // Build the inner content
        ByteArrayOutputStream innerContent = new ByteArrayOutputStream();
        innerContent.write(oid.getEncoded());
        innerContent.write(data);

        byte[] content = innerContent.toByteArray();

    }

    @Test
    void testPrintStreamDelegation() {
        // Test that LogStream properly delegates to underlying PrintStream
        // Use a real PrintStream with ByteArrayOutputStream to test delegation
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        PrintStream realStream = new PrintStream(baos);
        LogStream logStream = new LogStream(realStream);

        // Test delegation of various methods

        // Given
        SpnegoException original = new SpnegoException("serialize me", new IllegalArgumentException("iaex"));

        // When
        byte[] bytes;
        try (ByteArrayOutputStream bout = new ByteArrayOutputStream(); ObjectOutputStream oout = new ObjectOutputStream(bout)) {
            oout.writeObject(original);
            oout.flush();
            bytes = bout.toByteArray();
        }

        });
        assertTrue(e.getMessage().contains("PAC"));
    }

    // Test exception for invalid version
    @Test
    void testConstructorInvalidVersion() throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        DataOutputStream dos = new DataOutputStream(baos);

        // Write header with invalid version
        dos.writeInt(Integer.reverseBytes(1)); // 1 buffer

  private Hasher hasher;
  private HashFunction hashFunction;
  private final ByteArrayOutputStream buffer = new ByteArrayOutputStream();

  @SuppressWarnings("DoNotMock")
  @Override
  protected void setUp() throws Exception {
    super.setUp();
    hasher = mock(Hasher.class);
    hashFunction = mock(HashFunction.class);

    when(hashFunction.newHasher()).thenReturn(hasher);
  }

@NullUnmarked
public class LittleEndianDataInputStreamTest extends TestCase {

  private byte[] data;

  @Override
  protected void setUp() throws Exception {
    super.setUp();

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutputStream out = new DataOutputStream(baos);

    initializeData(out);

    data = baos.toByteArray();
  }