CrawlerSystemException exception = new CrawlerSystemException("Print stack trace test");

        StringWriter stringWriter = new StringWriter();
        PrintWriter printWriter = new PrintWriter(stringWriter);
        exception.printStackTrace(printWriter);

        String stackTraceOutput = stringWriter.toString();
        assertNotNull(stackTraceOutput);

    private StringWriter stringWriter;
    private PrintWriter printWriter;
    private ByteArrayOutputStream outputStream;
    private ServletOutputStream servletOutputStream;

    @BeforeEach
    void setUp() throws Exception {
        // Setup response writers
        stringWriter = new StringWriter();
        printWriter = new PrintWriter(stringWriter);
        outputStream = new ByteArrayOutputStream();

        private int status = 200;
        private final Map<String, String> headers = new HashMap<>();
        private final StringWriter stringWriter = new StringWriter();
        private final PrintWriter writer = new PrintWriter(stringWriter);

        @Override
        public void setStatus(int sc) {
            this.status = sc;
        }

        @Override

func (b *Writer) WriteString(s string) (int, error) {
	var sw io.StringWriter
	tryStringWriter := true

	nn := 0
	for len(s) > b.Available() && b.err == nil {
		var n int
		if b.Buffered() == 0 && sw == nil && tryStringWriter {
			// Check at most once whether b.wr is a StringWriter.
			sw, tryStringWriter = b.wr.(io.StringWriter)
		}
		if b.Buffered() == 0 && tryStringWriter {