@Test
public void testRemoveRoleMembersInvalidInput() {

    List<RoleMember> list = Collections.singletonList(new RoleMember().setMemberName("member1"));
    AuthzHelper.removeRoleMembers(list, null);
    assertEquals(list.size(), 1);
    assertEquals(list.get(0).getMemberName(), "member1");
    AuthzHelper.removeRoleMembers(null, list);
    assertEquals(list.size(), 1);
    assertEquals(list.get(0).getMemberName(), "member1");
}