// Should be null after removal
        assertNull(crawlerContext.removeSitemaps());

        // Test with null
        crawlerContext.addSitemaps(null);
        assertNull(crawlerContext.removeSitemaps());

        // Test with empty array
        crawlerContext.addSitemaps(new String[0]);
        String[] emptyArray = crawlerContext.removeSitemaps();
        assertNotNull(emptyArray);

                    final SitemapUrl sitemapUrl = new SitemapUrl();
                    sitemapUrl.setLoc(url);
                    sitemapSet.addSitemap(sitemapUrl);
                }
            }
            return sitemapSet;
        } catch (final Exception e) {
            throw new SitemapsException("Could not parse Text Sitemaps.", e);
        }

    }

    /**
     * Adds a sitemap URL to the list of sitemaps.
     *
     * @param url The URL of the sitemap to be added
     */
    public void addSitemap(final String url) {
        if (!sitemapList.contains(url)) {
            sitemapList.add(url);
        }
    }

    /**
     * Returns an array of sitemap URLs.
     *