@Test
public void testProcessListRequestCollectionEmpty() {

    
    String domainName = "listrequest";
    List<String> adminUsers = new ArrayList<>();
    adminUsers.add("user.user");
    zms.dbService.makeDomain(mockDomRsrcCtx, ZMSTestUtils.makeDomainObject(domainName, "Test Domain", "org",
            true, null, 0, null, 0), adminUsers, null, auditRef);
    
    zms.dbService.executeDeleteRole(mockDomRsrcCtx, domainName, "admin", auditRef, "unittest");
    
    List<String> names = new ArrayList<>();
    assertNull(zms.processListRequest(domainName, AthenzObject.ROLE, null, null, names));
    assertEquals(names.size(), 0);
    zms.dbService.executeDeleteDomain(mockDomRsrcCtx, domainName, auditRef, "unittest");
}