@Test
public void getCidrBlocks() {

  Road road = new Road();
  Authorisation authorisation = new Authorisation();
  Onramp onramp = new Onramp();
  List<String> cidrBlocks = singletonList("cidrBlock");
  onramp.setCidrBlocks(cidrBlocks);
  authorisation.setOnramp(onramp);
  road.setAuthorisation(authorisation);
  when(underTest.getRoad()).thenReturn(road);
  List<String> result = underTest.getCidrBlocks();
  assertThat(result, is(cidrBlocks));
}