addImpliedFeatures(sizesToTest);
    sizesToTest.retainAll(asList(CollectionSize.ZERO, CollectionSize.ONE, CollectionSize.SEVERAL));

    logger.fine("   Sizes: " + formatFeatureSet(sizesToTest));

    if (sizesToTest.isEmpty()) {
      throw new IllegalStateException(
          name
              + ": no CollectionSizes specified (check the argument to "
              + "FeatureSpecificTestSuiteBuilder.withFeatures().)");
    }

        return createTreap(Ints.asList(keys));
      }

      // See http://en.wikipedia.org/wiki/Treap for details on the algorithm.
      private Optional<BinaryNode> createTreap(List<Integer> keys) {
        if (keys.isEmpty()) {
          return Optional.absent();
        }
        int minIndex = 0;
        for (int i = 1; i < keys.size(); i++) {
          if (keys.get(i) < keys.get(minIndex)) {
            minIndex = i;
          }

        // Arrange: filter that accepts non-empty names ending with .txt
        SmbFileFilter filter = f -> {
            String n = f.getName();
            return n != null && !n.isEmpty() && n.endsWith(".txt");
        };
        when(smbFile.getName()).thenReturn(name);

        // Act
        boolean result = filter.accept(smbFile);

        // Assert
        assertEquals(expected, result);

    }

    @Override
    protected boolean isUseOneTimeContainer() {
        return true;
    }

    public void test_setFessConfig_null() {
        assertTrue(FessProp.propMap.isEmpty());
    }

    public void test_setFessConfig_notNull() {
        FessConfig mockConfig = new FessConfig.SimpleImpl();
        ComponentUtil.setFessConfig(mockConfig);

    }

    @Override
    public boolean containsAll(Collection<?> collection) {
      return standardContainsAll(collection);
    }

    @Override
    public boolean isEmpty() {
      return standardIsEmpty();
    }

    @Override
    public Iterator<E> iterator() {
      return standardIterator();
    }

    @Override

    registry.unregister(s1);
    assertEquals(1, registry.getSubscribersForTesting(String.class).size());

    registry.unregister(s2);
    assertTrue(registry.getSubscribersForTesting(String.class).isEmpty());
  }

  public void testUnregister_notRegistered() {
    assertThrows(IllegalArgumentException.class, () -> registry.unregister(new StringSubscriber()));

    StringSubscriber s1 = new StringSubscriber();

        // -------------------------------------------------------------------------------------

        String path = System.getProperty(altLocationSysProp);

        if (path == null || path.isEmpty()) {
            // TODO This replacing shouldn't be necessary as user.home should be in the
            // context of the container and thus the value would be interpolated by Plexus

                incrementalVersion = null;
                buildNumber = null;
            }
        }
    }

    private static boolean isDigits(String cs) {
        if (cs == null || cs.isEmpty()) {
            return false;
        }
        final int sz = cs.length();
        for (int i = 0; i < sz; i++) {
            if (!Character.isDigit(cs.charAt(i))) {
                return false;

        }

        // Wait for all threads to complete
        for (Thread thread : threads) {
            thread.join();
        }

        // Verify results
        assertTrue(exceptions.isEmpty());
        assertEquals(threadCount * objectsPerThread, createdComponents.size());

        // Check all components are unique (for prototype)
        for (int i = 0; i < createdComponents.size(); i++) {

      val requestLineString = socket.source.readUtf8LineStrict()
      if (requestLineString.isEmpty()) {
        throw ProtocolException("no request because the stream is exhausted")
      }
      request = decodeRequestLine(requestLineString)

      while (true) {
        val header = socket.source.readUtf8LineStrict()
        if (header.isEmpty()) {
          break
        }
        addHeaderLenient(headers, header)