file.delete();
            file.mkdirs();
            file.deleteOnExit();
            fileTransformer.setPath(file.getAbsolutePath());
            crawler.addUrl(url);
            crawler.getCrawlerContext().setMaxAccessCount(maxCount);
            crawler.getCrawlerContext().setNumOfThread(numOfThread);
            crawler.urlFilter.addInclude(url + ".*");

            logger.debug("Populating class realm '" + extRealm.getId() + "'");

            for (Path file : extClassPath) {
                logger.debug("  included '" + file + "'");
                extRealm.addURL(file.toUri().toURL());
            }

            ArrayList<CoreExtensionEntry> reversed = new ArrayList<>(extensions);
            Collections.reverse(reversed);
            for (CoreExtensionEntry entry : reversed) {

            if (logger.isDebugEnabled()) {
                String id = getId(constituent);
                logger.debug("  Included: {}", id);
            }

            try {
                classRealm.addURL(file.toURI().toURL());
            } catch (MalformedURLException e) {
                // Not going to happen
                logger.error(e.getMessage(), e);
            }
        }
    }

                log.debug("  Excluded {}", id);
            } else {
                File file = artifact.getFile();
                log.debug("  Included {} located at {}", id, file);
                realm.addURL(file.toURI().toURL());
            }
        }
        return CoreExtensionEntry.discoverFrom(
                realm,
                Collections.singleton(artifacts.get(0).getFile()),

        if (redirectUrlObj instanceof String) {
            final UrlConvertHelper urlConvertHelper = crawlerContainer.getComponent("urlConvertHelper");
            resultData.addUrl(RequestDataBuilder.newRequestData().get().url(urlConvertHelper.convert(redirectUrlObj.toString())).build());
        }

        return resultData;
    }

        Set<String> exportedPackages = new HashSet<>(coreEntry.getExportedPackages());
        for (CoreExtensionEntry extension : extensions) {
            exportedArtifacts.addAll(extension.getExportedArtifacts());
            exportedPackages.addAll(extension.getExportedPackages());
        }

        final CoreExports exports = new CoreExports(containerRealm, exportedArtifacts, exportedPackages);

    BiConsumer<A, SomeEnum> adder = collector.accumulator();
    adder.accept(accumulator, SomeEnum.A);
    adder.accept(accumulator, SomeEnum.B);
    ImmutableSet<SomeEnum> set = collector.finisher().apply(accumulator);
    assertThat(set).containsExactly(SomeEnum.A, SomeEnum.B);

    // Subsequent manual manipulation of the accumulator must not affect the state of the built set
    adder.accept(accumulator, SomeEnum.C);

    oneValueAccumulatorByAddAllEmptyStats.addAll(Stats.of());

    twoValuesAccumulator = new StatsAccumulator();
    twoValuesAccumulator.addAll(TWO_VALUES);

    twoValuesAccumulatorByAddAllStats = new StatsAccumulator();
    twoValuesAccumulatorByAddAllStats.addAll(Stats.of(ONE_VALUE));
    twoValuesAccumulatorByAddAllStats.addAll(Stats.of(OTHER_ONE_VALUE));

  public void testAddAll_supportedNothing() {
    assertFalse("addAll(nothing) should return false", collection.addAll(emptyCollection()));
    expectUnchanged();
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  public void testAddAll_unsupportedNothing() {
    try {
      assertFalse(
          "addAll(nothing) should return false or throw", collection.addAll(emptyCollection()));

    private <T> Collection<T> getExtensionComponents(Collection<MavenProject> projects, Class<T> role) {
        Collection<T> foundComponents = new LinkedHashSet<>();
        foundComponents.addAll(lookup.lookupList(role));
        foundComponents.addAll(getProjectScopedExtensionComponents(projects, role));
        return foundComponents;
    }