@Test(expected = CloudRuntimeException.class)
public void getHostPrivateMacAddressTestExpectException() {

    String arpResult = "0.0.0.0 ether 00:00:00:00:00 C interface";
    HostVO hostVo = new HostVO("");
    hostVo.setPrivateIpAddress("");
    Mockito.doReturn(arpResult).when(shellCommandUtils).executeCommand(Mockito.anyString());
    xenHypervisor.getHostPrivateMacAddress(hostVo);
}