public void testDeleteNonExistentMember() throws Exception {
        final String GROUP_NAME = "Test Group A";
        final JID needle = new JID("jane@" + Fixtures.XMPP_DOMAIN);
        final DefaultGroupProvider provider = new DefaultGroupProvider();
        provider.createGroup(GROUP_NAME);

        try {
            provider.deleteMember(GROUP_NAME, needle);
        } catch (Throwable t){
            fail("Exception deleting a non-existent group member. This should fail silently as a no-op.");
        }
        final Group result = provider.getGroup(GROUP_NAME);

        assertEquals(0, result.getMembers().size());
    }
Verifies that {@link DefaultGroupProvider#deleteMember(String, JID)} fails silently when removing a non-existent
member from a group
xmppserver/src/test/java/org/jivesoftware/openfire/group/DefaultGroupProviderTest.java