@Test
  public void testAddGroup() throws Exception {
    OnmsGroupList groups =
        JaxbUtils.unmarshal(OnmsGroupList.class, sendRequest(GET, "/groups", 200));
    assertNotNull(groups);
    assertTrue(groups.size() > 0);
    int initialGroupSize = groups.size();

    createGroup("My little Test group"); // add group
    String xml = sendRequest(GET, "/groups", 200);
    groups = JaxbUtils.unmarshal(OnmsGroupList.class, xml);
    assertEquals(initialGroupSize + 1, groups.size());
    assertTrue(xml.contains(">My little Test group<"));
  }