@Test
  public void testXMLSerializer() throws Exception {
    String datastoreFile = "testdatastore.xml";
    deleteFile(datastoreFile);

    Serializer serializer = new XMLSerializer(new File(datastoreFile));

    pacemaker = new PacemakerAPI(serializer);
    populate(pacemaker);
    pacemaker.store();

    PacemakerAPI pacemaker2 = new PacemakerAPI(serializer);
    pacemaker2.load();

    assertEquals(pacemaker.getUsers().size(), pacemaker2.getUsers().size());
    for (User user : pacemaker.getUsers()) {
      assertTrue(pacemaker2.getUsers().contains(user));
    }
    // deleteFile ("testdatastore.xml");
  }