public void testRemoveExistingRequiredMemberOk() {
UserImpl role1 = new UserImpl("bar");
UserImpl role2 = new UserImpl("qux");
GroupImpl group = new GroupImpl("foo");
assertTrue(group.addMember(role1));
assertTrue(group.addRequiredMember(role2));
assertEquals(1, group.getMembers().length);
assertEquals(1, group.getRequiredMembers().length);