@Test
public void configureNicDhcpAndDnsTestAllDnsBlank() {

    StringBuilder buf = new StringBuilder();
    DataCenterVO dc = configureDataCenterDns("", "", "", "");
    VirtualMachineProfile profile = configureDcProfileAndVm(dc);
    spy.configureNicDhcpAndDns(profile, buf, true);
    Assert.assertEquals(" bootproto=dhcp internaldns1= internaldns2= dns1= dns2=", buf.toString());
}