*
     * @param fileUrl
     *            The URL of the Jar file. Must not be {@literal null}.
     * @return The {@link File} of the Jar file.
     */
    public static File toFile(final URL fileUrl) {
        assertArgumentNotNull("fileUrl", fileUrl);

        try {
            final String path = URLDecoder.decode(fileUrl.getPath(), "UTF-8");
            return new File(path).getAbsoluteFile();

     * @throws FileAccessException
     *             If the file cannot be accessed or created.
     */
    public DynamicProperties(final Path path) {
        this(path == null ? null : path.toFile());
    }

    /**
     * Constructs a {@code DynamicProperties} instance with the specified {@link File}.
     *
     * @param file

                }
            } catch (final Exception e) {
                throw new PluginException("Failed to install the artifact " + artifact.getName(), e);
            }
        } else {
            try (final InputStream in = new FileInputStream(url)) {
                CopyUtil.copy(in, ResourceUtil.getPluginPath(fileName).toFile());
            } catch (final Exception e) {

            }
        };
        ComponentUtil.register(systemHelper, "systemHelper");

        // Create temporary directory for test JAR files
        tempDir = Files.createTempDirectory("datastore-test").toFile();
        tempDir.deleteOnExit();
    }

    @Override
    public void tearDown() throws Exception {
        // Clean up temporary files
        if (tempDir != null && tempDir.exists()) {

   *     names in a loop until {@code mkdir()} returns {@code true}.) For JRE users, prefer {@link
   *     java.nio.file.Files#createTempDirectory}, transforming it to a {@link File} using {@link
   *     java.nio.file.Path#toFile() toFile()} if needed. To restrict permissions as this method
   *     does, pass {@code
   *     PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString("rwx------"))} to your
   *     call to {@code createTempDirectory}.

   *     names in a loop until {@code mkdir()} returns {@code true}.) For JRE users, prefer {@link
   *     java.nio.file.Files#createTempDirectory}, transforming it to a {@link File} using {@link
   *     java.nio.file.Path#toFile() toFile()} if needed. To restrict permissions as this method
   *     does, pass {@code
   *     PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString("rwx------"))} to your
   *     call to {@code createTempDirectory}.

    @Override
    public void setUp() throws Exception {
        super.setUp();
        thumbnailJob = new GenerateThumbnailJob();

        // Create temporary directory
        tempDir = Files.createTempDirectory("test").toFile();
        tempDir.deleteOnExit();

        // Setup test components
        testProcessHelper = new TestProcessHelper();
        ComponentUtil.register(testProcessHelper, "processHelper");

        fileList = systemHelper.refreshDesignJspFiles();
        assertEquals(1, fileList.size());
        assertEquals("ok", FileUtil.readText(fileList.get(0).toFile()));
    }

    public void test_updateSystemProperties() {
        final SystemHelper helper = new SystemHelper();
        final AtomicReference<String> appValue = new AtomicReference<>(StringUtil.EMPTY);

        }
    }

    @Override
    public void setUp() throws Exception {
        super.setUp();
        execJob = new TestExecJob();
        tempDir = Files.createTempDirectory("execjob_test").toFile();

        // Store original helpers
        originalSystemHelper = ComponentUtil.hasComponent("systemHelper") ? ComponentUtil.getSystemHelper() : null;

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final FileTemplateLoader loader = new FileTemplateLoader(ResourceUtil.getViewTemplatePath().toFile());
        final Handlebars handlebars = new Handlebars(loader);

        Locale locale = ComponentUtil.getRequestManager().getUserLocale();
        if (locale == null) {
            locale = Locale.ENGLISH;