require(flags shr 15 != 0) { "not a response" }

    val responseCode = flags and 0xf

    if (responseCode == NXDOMAIN) {
      throw UnknownHostException("$hostname: NXDOMAIN")
    } else if (responseCode == SERVFAIL) {
      throw UnknownHostException("$hostname: SERVFAIL")
    }

    val questionCount = buf.readShort().toInt() and 0xffff
    val answerCount = buf.readShort().toInt() and 0xffff

            @Override
            public Integer call() throws Exception {
              runLatch.countDown();
              taskLatch.await();
              if (throwException) {
                throw new IllegalStateException("Fail");
              }
              return 25;
            }
          });

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

    exec = newCachedThreadPool();

        assertFalse(target.isOpen());
        assertTrue(target.isStale());
    }

    @Test
    @DisplayName("getInput and getOutput throw after close")
    void testGetInputOutputAndClosed() throws CIFSException {
        // After closing the handle, further calls throw
        target.close();
        CIFSException e1 = assertThrows(SmbException.class, target::getInput);

     *
     * @param props the properties to use for initialization
     * @throws CIFSException if the singleton context is already initialized or there is an error during initialization
     */
    public static synchronized final void init(final Properties props) throws CIFSException {
        if (INSTANCE != null) {
            throw new CIFSException("Singleton context is already initialized");
        }

  private Target nullSingleton;

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

    empty = new Target(emptyCollection(), "empty");
    /*
     * We test that nullSingleton.retainAll(disjointList) does NOT throw a
     * NullPointerException when disjointList does not, so we can't use
     * MinimalCollection, which throws NullPointerException on calls to
     * contains(null).
     */

    }

    @Test
    void testInvalidPath() throws Exception {
        // Test various invalid URL formats that should throw MalformedURLException
        assertThrows(MalformedURLException.class, () -> new SmbFile("not-a-url", context),
                "Invalid URL should throw MalformedURLException");
    }

    @Test
    void testPublicShareAccess() throws Exception {

        // Then
        assertEquals(0, bytesWritten);
    }

    @Test
    @DisplayName("Should read valid structure from wire format")
    void testReadBytesWireFormatValidStructure() throws SMBProtocolDecodingException {
        // Given
        byte[] buffer = new byte[256];
        int offset = 10;

        // Write valid structure (16 bytes)

    /**
     * Ensures the exception is thrown and captured via assertThrows with the right message.
     */
    @Test
    void assertThrowsCapturesExceptionAndMessage() {
        // Act & Assert
        SmbEndOfFileException thrown = assertThrows(SmbEndOfFileException.class, () -> {
            throw new SmbEndOfFileException();
        });
        assertEquals("Unexpectedly reached end of file", thrown.getMessage());
    }

    /**

   *
   * @throws IllegalArgumentException if {@code x <= 0}
   * @throws ArithmeticException of the next-higher power of two is not representable as a {@code
   *     long}, i.e. when {@code x > 2^62}
   * @since 20.0
   */
  public static long ceilingPowerOfTwo(long x) {
    checkPositive("x", x);
    if (x > MAX_SIGNED_POWER_OF_TWO) {

     * </p>
     *
     * @param bytes the byte array (must not be {@literal null})
     * @return the deserialized object
     * @throws IORuntimeException if an I/O error occurs or if a class is rejected by the filter
     * @throws ClassNotFoundRuntimeException if the class of a serialized object cannot be found
     */
    public static Object fromBinaryToObject(final byte[] bytes) {