}

    /**
     * Test constructor with null configuration
     */
    @Test
    @DisplayName("Test constructor throws NullPointerException with null configuration")
    public void testConstructorWithNullConfig() {
        // When & Then - should throw NullPointerException since ServerMessageBlock calls config.getPid()
        NullPointerException exception = assertThrows(NullPointerException.class, () -> {

    LoadingCache<Object, Object> cache =
        new AbstractLoadingCache<Object, Object>() {
          @Override
          public Object get(Object key) throws ExecutionException {
            Object v = valueRef.get();
            if (v == null) {
              throw new ExecutionException(cause);
            }
            return v;
          }

          @Override
          public @Nullable Object getIfPresent(Object key) {

     * @param smbFile the SmbFile directory to list
     * @return array of SmbFile objects representing the directory contents
     * @throws SmbException if an error occurs
     */
    public static SmbFile[] listFilesWithLeasing(SmbFile smbFile) throws SmbException {
        if (!smbFile.isDirectory()) {
            throw new SmbException("Not a directory: " + smbFile.getPath());
        }

  private static <X extends Exception> void wrapAndThrowExceptionOrError(
      Throwable cause, Class<X> exceptionClass) throws X {
    if (cause instanceof Error) {
      throw new ExecutionError((Error) cause);
    }
    if (cause instanceof RuntimeException) {
      throw new UncheckedExecutionException(cause);
    }
    throw newWithCause(exceptionClass, cause);
  }

  /*

   *   throwIfUnchecked(failure);
   *   throw new AssertionError(failure);
   * }
   * </pre>
   *
   * @since 20.0
   */
  @GwtIncompatible // Class.cast, Class.isInstance
  public static <X extends Throwable> void throwIfInstanceOf(
      Throwable throwable, Class<X> declaredType) throws X {
    checkNotNull(throwable);
    if (declaredType.isInstance(throwable)) {
      throw declaredType.cast(throwable);
    }
  }

  public void readFully(byte[] b, int off, int len) throws IOException {
    ByteStreams.readFully(this, b, off, len);
  }

  @Override
  public int skipBytes(int n) throws IOException {
    return (int) in.skip(n);
  }

  @CanIgnoreReturnValue // to skip a byte
  @Override
  public int readUnsignedByte() throws IOException {
    int b1 = in.read();
    if (b1 < 0) {
      throw new EOFException();
    }

    return b1;

        }
    }

    @Override
    public int recv(final byte[] buf, final int off, final int len) throws IOException {
        return getInput().readDirect(buf, off, len);

    }

    @Override
    public void send(final byte[] buf, final int off, final int length) throws IOException {
        getOutput().writeDirect(buf, off, length, 1);
    }

    /**
     *
     * {@inheritDoc}

    } catch (ExecutionException e) {
      throw e.getCause();
    }
  }

  /**
   * Verify that the listener completes in a reasonable amount of time, and Asserts that the future
   * throws an {@code ExecutableException} and that the cause of the {@code ExecutableException} is
   * {@code expectedCause}.
   */
  public void assertException(Throwable expectedCause) throws Exception {

     * @param args the array of objects to be passed as arguments to the constructor invocation
     * @return a new object created by invoking the constructor
     * @throws InstantiationRuntimeException if the class declaring the constructor is abstract
     * @throws IllegalAccessRuntimeException if the number of actual and formal parameters differ, if primitive arguments cannot be converted, or if the class is related to enums

   *     removed
   * @return this {@code CacheBuilder} instance (for chaining)
   * @throws IllegalArgumentException if {@code duration} is negative
   * @throws IllegalStateException if {@link #expireAfterWrite} was already set
   * @throws ArithmeticException for durations greater than +/- approximately 292 years
   * @since 33.3.0 (but since 25.0 in the JRE <a