@Test
public void addNewUri() throws Exception {

    CrawleableUri uri_1 = cuf.create(new URI("http://dbpedia.org/resource/Tom_Lazarus"), null, UriType.UNKNOWN);
    frontier.addNewUri(uri_1);
    List<CrawleableUri> nextUris = frontier.getNextUris();
    List<CrawleableUri> assertion = new ArrayList<>();
    assertion.add(cuf.create(new URI("http://dbpedia.org/resource/Tom_Lazarus"),
        InetAddress.getByName("194.109.129.58"), UriType.DEREFERENCEABLE));
    assertEquals(assertion, nextUris);
}