@BeforeAll
    public static void beforeClass() throws Exception {
        Fixtures.reconfigureOpenfireHome();
        Fixtures.disableDatabasePersistence();
        groupCache = CacheFactory.createCache("Group");
        groupCache.clear();
        JiveGlobals.setProperty("provider.group.className", GroupTest.TestGroupProvider.class.getName());
    }
Verifies the functionality as implemented by #Group

@author Guus der Kinderen, guus@goodbytes.nl
xmppserver/src/test/java/org/jivesoftware/openfire/group/GroupTest.java