ByteSource source = newByteSource(0, 50);
    int[] counter = new int[1];
    ByteSource checker =
        new ByteSource() {
          @Override
          public InputStream openStream() throws IOException {
            if (counter[0]++ != 0) {
              throw new IllegalStateException("More than one source open");
            }
            return new FilterInputStream(source.openStream()) {
              @Override

        assertFalse(loopback.isUsableForChannel());
    }

    @Test
    void testGetScore() {
        NetworkInterfaceInfo basic = new NetworkInterfaceInfo(testAddress, 1000);
        assertEquals(1000, basic.getScore()); // Base score is link speed

        NetworkInterfaceInfo fast = new NetworkInterfaceInfo(testAddress, 10000);

  private static final Map<AnnotatedElement, List<Annotation>> annotationCache = new HashMap<>();

  private static final Map<Class<?>, TesterRequirements> classTesterRequirementsCache =
      new HashMap<>();

  private static final Map<Method, TesterRequirements> methodTesterRequirementsCache =
      new HashMap<>();

  /**

  protected Map<String, String> makeEmptyMap() {
    Map<String, Integer> underlying = new HashMap<>();
    return transformValues(
        new UnmodifiableIteratorMap<String, Integer>(underlying), Functions.toStringFunction());
  }

  @Override
  protected Map<String, String> makePopulatedMap() {
    Map<String, Integer> underlying = new HashMap<>();
    underlying.put("a", 1);
    underlying.put("b", 2);

        void testInitResponseChained() {
            TestServerMessageBlock2Response response1 = new TestServerMessageBlock2Response(mockConfig);
            TestServerMessageBlock2Response response2 = new TestServerMessageBlock2Response(mockConfig);

            TestServerMessageBlock2Request nextRequest = new TestServerMessageBlock2Request(mockConfig);
            nextRequest.setTestResponse(response2);

    return filterCollection(unfiltered.get(key), new ValuePredicate(key));
  }

  @Override
  Collection<Entry<K, V>> createEntries() {
    return filterCollection(unfiltered.entries(), predicate);
  }

  @Override
  Collection<V> createValues() {
    return new FilteredMultimapValues<>(this);
  }

  @Override
  Iterator<Entry<K, V>> entryIterator() {
    throw new AssertionError("should never be called");
  }

        if (baseDir == null) {
            if (path == null) {
                // current directory
                baseDir = new File(".");
            } else {
                baseDir = new File(path);
                if (!baseDir.isDirectory() && !baseDir.mkdirs()) {
                    throw new CrawlerSystemException("Could not create " + baseDir.getAbsolutePath());
                }
            }
        }
    }

          }
        };
    static final PermittedMetaException UOE =
        new PermittedMetaException("UnsupportedOperationException") {
          @Override
          boolean isPermitted(Exception exception) {
            return exception instanceof UnsupportedOperationException;
          }
        };
    static final PermittedMetaException ISE =
        new PermittedMetaException("IllegalStateException") {
          @Override

        assertEquals(35L, item.getDocFreq());
        assertEquals(2.0f, item.getUserBoost(), 0.001f);
        assertEquals(2, item.getReadings().length);
        assertArrayEquals(new String[] { "reading1", "reading2" }, item.getReadings()[0]);
        assertArrayEquals(new String[] { "reading3" }, item.getReadings()[1]);
        assertEquals(1, item.getFields().length);
        assertEquals("field1", item.getFields()[0]);

        // Test that the constructor and getters work with proper setup
        FessConfig mockConfig = new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override
            public Set<String> getApiPingEsFieldSet() {
                return new HashSet<>();
            }
        };
        ComponentUtil.register(mockConfig, "fessConfig");