public void registerConverter(ConfigurationConverter converter) {
        delegate.registerConverter(converter);
    }

    @Override
    public ConfigurationConverter lookupConverterForType(Class<?> type) throws ComponentConfigurationException {
        ConfigurationConverter converter = delegate.lookupConverterForType(type);
        return converter.getClass().equals(ObjectWithFieldsConverter.class)

import java.util.Scanner;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

class StringSourceTest {
    @Test
    void testGetInputStream() throws Exception {
        StringSource source = new StringSource("Hello World!");

        try (InputStream is = source.getInputStream();
                Scanner scanner = new Scanner(is)) {

     */
    protected abstract Pattern getTagPattern();

    @Override
    public ExtractData getText(final InputStream in, final Map<String, String> params) {
        if (in == null) {
            throw new CrawlerSystemException("XML input stream is null. Cannot extract text from null input.");
        }
        try {
            final BufferedInputStream bis = new BufferedInputStream(in);

    resetMap(createArrayWithNullValue());
  }

  /**
   * Equivalent to {@link #expectMissingKeys(Object[]) expectMissingKeys} {@code (null)} except that
   * the call to {@code contains(null)} is permitted to throw a {@code NullPointerException}.
   *
   * @param message message to use upon assertion failure
   */
  protected void expectNullKeyMissingWhenNullKeysUnsupported(String message) {
    try {

                    } catch (final IOException e) {
                        throw new IORuntimeException(e);
                    }
                    logFileItems.add(map);
                });
            } catch (final Exception e) {
                throw new FessSystemException("Failed to access log files.", e);
            }
        }
        return logFileItems;
    }

  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  public void testRemove_unsupportedNotPresent() {
    try {
      assertFalse(
          "remove(notPresent) should return false or throw UnsupportedOperationException",
          collection.remove(e3()));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
    expectMissing(e3());
  }

      throw new RuntimeException("bad constructor");
    }

    public ExceptionWithGoodAndBadConstructor(Throwable cause) {
      super(cause);
    }
  }

  static final class ExceptionWithBadConstructor extends Exception {
    public ExceptionWithBadConstructor(String message, Throwable cause) {
      throw new RuntimeException("bad constructor");
    }
  }

  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
  public void testGet_nullNotContainedAndUnsupported() {
    try {
      assertNull("get(null) should return null or throw", get(null));
    } catch (NullPointerException tolerated) {
    }
  }

  @MapFeature.Require(ALLOWS_NULL_KEYS)
  @CollectionSize.Require(absent = ZERO)
  public void testGet_nonNullWhenNullContained() {

    }

    @Override
    public <T> T lookup(Class<T> type) {
        Optional<T> optional = lookupOptional(type);
        if (optional.isPresent()) {
            return optional.get();
        } else {
            throw new LookupException("No mapping for key: " + type.getName());
        }
    }

    @Override
    public <T> T lookup(Class<T> type, String name) {
        return lookup(type);
    }

    @Override

    }

    @Override
    public void addHandlers(Map<String, ArtifactHandler> handlers) {
        throw new UnsupportedOperationException("Adding handlers programmatically is not supported anymore");
    }

    @Deprecated
    public Set<String> getHandlerTypes() {
        throw new UnsupportedOperationException("Querying handlers programmatically is not supported anymore");
    }