@Test
public void createRoad() throws Exception {

  JsonNode road = mapper.readTree("{\"name\":\"road1\"}");
  List<PatchOperation> operations = singletonList(PatchOperation.add("", road));
  JsonNode result = underTest.apply(NullNode.getInstance(), operations);
  assertThat(result.isMissingNode(), is(false));
  assertThat(result.path("name").textValue(), is("road1"));
}