/** Total processing time for all documents in this list */
    private long processingTime = 0;

    /**
     * Default constructor for DocList.
     * Creates a new empty document list with zero content size and processing time.
     */
    public DocList() {
        super();
    }

    /**
     * Clears all documents from the list and resets metrics.

        docList.addContentSize(100);
        assertEquals(100, docList.getContentSize());

        docList.addContentSize(-30);
        assertEquals(70, docList.getContentSize());

        docList.addContentSize(-100);
        assertEquals(-30, docList.getContentSize());
    }

    public void test_addProcessingTime_negative() {
        DocList docList = new DocList();

        final CrawlingInfoHelper crawlingInfoHelper = ComponentUtil.getCrawlingInfoHelper();
        final LanguageHelper languageHelper = ComponentUtil.getLanguageHelper();
        final List<Map<String, Object>> docList = body.documents.stream().map(doc -> {
            if (!doc.containsKey(indexFieldContentLength)) {
                long contentLength = 0;
                if (doc.get(indexFieldTitle) instanceof final String title) {