public void testDoConfigure() throws Exception {
    UpdateSite target = new UpdateSite("test1", "http://example.com/test/update-center.json");

    // Multiple update site.
    Jenkins.getInstance().getUpdateCenter().getSites().clear();
    Jenkins.getInstance().getUpdateCenter().getSites().add(target);

    String originalId = target.getId();

    WebClient wc = new WebClient();

    HtmlPage editSitePage = wc.goTo(String.format("%s/%s", UpdateSitesManager.URL, target.getId()));

    HtmlForm editSiteForm = editSitePage.getFormByName("editSiteForm");
    assertNotNull("There must be editSiteForm", editSiteForm);

    String newId = "newId";
    String newUrl = "http://localhost/update-center.json";
    editSiteForm.getInputByName("_.id").setValueAttribute(newId);
    editSiteForm.getInputByName("_.url").setValueAttribute(newUrl);
    submit(editSiteForm);

    UpdateSite site = null;
    for (UpdateSite s : Jenkins.getInstance().getUpdateCenter().getSites()) {
      if (newId.equals(s.getId())) {
        site = s;
      }
      assertFalse("id must be updated(old one must not remain)", originalId.equals(s.getId()));
    }
    assertNotNull("id must be updated", site);
    assertEquals("url must be updated", newUrl, site.getUrl());
  }