}

  private static final SuccessorsFunction<File> FILE_TREE =
      file -> {
        // check isDirectory() just because it may be faster than listFiles() on a non-directory
        if (file.isDirectory()) {
          File[] files = file.listFiles();
          if (files != null) {
            return unmodifiableList(Arrays.asList(files));
          }
        }

        return ImmutableList.of();

     *            the handler to process resources
     */
    protected static void traverseFileSystem(final File rootDir, final File baseDir, final ResourceHandler handler) {
        for (final File file : baseDir.listFiles()) {
            if (file.isDirectory()) {
                traverseFileSystem(rootDir, file, handler);
            } else {
                final int pos = FileUtil.getCanonicalPath(rootDir).length();

     */
    protected void appendJarFile(final String cpSeparator, final StringBuilder buf, final File libDir, final String basePath) {
        final File[] jarFiles = libDir.listFiles((FilenameFilter) (dir, name) -> name.toLowerCase().endsWith(".jar"));
        if (jarFiles != null) {
            for (final File file : jarFiles) {
                buf.append(cpSeparator);

    private static void cleanPsOutputAndThreaddumpFilesFromPreviousRun(File rootProjectDir) {
        if (executionMode == ExecutionMode.KILL_LEAKED_PROCESSES_FROM_PREVIOUS_BUILDS) {
            File[] psOutputs = rootProjectDir.listFiles((__, name) -> name.endsWith(".psoutput") || name.endsWith(".threaddump"));
            if (psOutputs != null) {
                Stream.of(psOutputs).forEach(File::delete);
            }
        }
    }

            }
            return list.toArray(new String[list.size()]);
        } catch (final CIFSException e) {
            throw SmbException.wrap(e);
        }
    }

    static SmbFile[] listFiles(final SmbFile root, final String wildcard, final int searchAttributes, final SmbFilenameFilter fnf,
            final SmbFileFilter ff) throws SmbException {

   *     <i>(optional specific exception)</i>
   * @throws IOException if an I/O error occurs
   */
  public static ImmutableList<Path> listFiles(Path dir) throws IOException {
    try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
      return ImmutableList.copyOf(stream);
    } catch (DirectoryIteratorException e) {
      throw e.getCause();

        // 1. For each earlier version
        earlierVersions.forEach(earlierVersion -> {
            // 2. Find all the changelog files it contained
            Set<String> filesInTreeForVersion = gitWrapper.listFiles("v" + earlierVersion, "docs/changelog")
                .map(line -> Path.of(line).getFileName().toString())
                .collect(toSet());

            Set<File> filesForVersion = new HashSet<>();

        SmbFile dir1 = mock(SmbFile.class);
        when(dir1.getName()).thenReturn("folder/");
        when(dir1.isDirectory()).thenReturn(true);

        when(smbFile.listFiles()).thenReturn(new SmbFile[] { file1, dir1 });
        when(smbFile.getLocator()).thenReturn(locator);

        networkExplorer.doDirectory(request, response, smbFile);

        if (tempDir != null && tempDir.exists()) {
            deleteDirectory(tempDir);
        }
        super.tearDown(testInfo);
    }

    private void deleteDirectory(File dir) {
        File[] files = dir.listFiles();
        if (files != null) {
            for (File file : files) {
                if (file.isDirectory()) {
                    deleteDirectory(file);
                } else {
                    file.delete();

        }
        ComponentUtil.setFessConfig(null);
        super.tearDown(testInfo);
    }

    private void deleteDirectory(File dir) {
        if (dir.isDirectory()) {
            File[] files = dir.listFiles();
            if (files != null) {
                for (File file : files) {
                    deleteDirectory(file);
                }
            }
        }
        dir.delete();
    }