// Add some test data
        crawler.addUrl("http://example.com/");

        // Perform cleanup - should not throw exception
        crawler.cleanup(sessionId);
    }

    public void test_stop() throws Exception {
        final CrawlerWebServer server = new CrawlerWebServer(7070);
        server.start();

        try {
            final String url = "http://localhost:7070/";

    assertEquals(a, sortedMultiset.headMultiset(c.getElement(), OPEN).lastEntry());
  }

  @CollectionSize.Require(SEVERAL)
  public void testFloor() {
    resetWithHole();
    assertEquals(a, sortedMultiset.headMultiset(a.getElement(), CLOSED).lastEntry());
    assertEquals(a, sortedMultiset.headMultiset(b.getElement(), CLOSED).lastEntry());

    assertEquals(a, sortedMultiset.headMultiset(c.getElement(), OPEN).lastEntry());
  }

  @CollectionSize.Require(SEVERAL)
  public void testFloor() {
    resetWithHole();
    assertEquals(a, sortedMultiset.headMultiset(a.getElement(), CLOSED).lastEntry());
    assertEquals(a, sortedMultiset.headMultiset(b.getElement(), CLOSED).lastEntry());