assertEquals("sometimes", ((SitemapUrl) sitemaps[0]).getChangefreq());
        assertEquals("rarely", ((SitemapUrl) sitemaps[1]).getChangefreq());
    }

    public void test_parseXmlSitemaps_withInvalidDate() {
        // Invalid date formats should be preserved
        final String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"