/**
   * assert component visible.
   *
   * @param path path to component
   */
  public void assertVisible(String path) {
    Component component = getLastRenderedPage().get(path);
    if (component == null) {
      Assert.fail(
          "path: '"
              + path
              + "' does no exist for page: "
              + Classes.simpleName(getLastRenderedPage().getClass()));
    }

    Assert.assertTrue("component '" + path + "' is not visible", component.isVisible());
  }