@Test
public void testGetExternalInterfacesEmptyList()
{

    when(externalInterfaceDao.getExternalInterfaces()).thenReturn(Collections.emptyList());
    ExternalInterfaceKeys externalInterfaceKeys = externalInterfaceService.getExternalInterfaces();
    assertNotNull(externalInterfaceKeys);
    assertEquals(0, externalInterfaceKeys.getExternalInterfaceKeys().size());
    verify(externalInterfaceDao).getExternalInterfaces();
    verifyNoMoreInteractionsHelper();
}