### Question:
DefaultPathsDiffValidatorFactory implements PathsDiffValidatorFactory { @Override public List<PathsDiffValidator> create() { List<PathsDiffValidator> validators = new ArrayList<>(); validators.add(new PathsPathItemsDiffValidator(pathItemDiffValidatorFactory.create())); return Collections.unmodifiableList(validators); } DefaultPathsDiffValidatorFactory(
      PathItemDiffValidatorFactory pathItemDiffValidatorFactory); @Override List<PathsDiffValidator> create();  }### Answer:
@Test public void create() { List<PathsDiffValidator> validators = validatorFactory.create(); assertThat(validators).hasSize(1); }