}

  /** A {@link File} that provides a specialized value for {@link File#length()}. */
  private static class BadLengthFile extends File {

    private final long badLength;

    BadLengthFile(File delegate, long badLength) {
      super(delegate.getPath());
      this.badLength = badLength;
    }

    @Override
    public long length() {

  }

  /** A {@link File} that provides a specialized value for {@link File#length()}. */
  private static class BadLengthFile extends File {

    private final long badLength;

    BadLengthFile(File delegate, long badLength) {
      super(delegate.getPath());
      this.badLength = badLength;
    }

    @Override
    public long length() {