@Test
public void testNullLoadAuditRefValidator(){

    System.setProperty(ZMSConsts.ZMS_PROP_AUDIT_REF_VALIDATOR_FACTORY_CLASS, "does.not.exist");
    try {
        zms.loadAuditRefValidator();
    } catch (IllegalArgumentException e) {
        assertEquals(e.getMessage(), "Invalid audit reference factory class");
    }
    System.clearProperty(ZMSConsts.ZMS_PROP_AUDIT_REF_VALIDATOR_FACTORY_CLASS);
}