final AtomicBoolean storeCalled = new AtomicBoolean(false);
        final AtomicReference<DataConfig> capturedConfig = new AtomicReference<>();
        final AtomicReference<IndexUpdateCallback> capturedCallback = new AtomicReference<>();
        final AtomicReference<DataStoreParams> capturedParams = new AtomicReference<>();

        dataStore = new DataStore() {
            @Override

// Since this class only needs CAS on one field, we can avoid this bug by extending AtomicReference
// instead of using an AtomicReferenceFieldUpdater. This reference stores Thread instances
// and DONE/INTERRUPTED - they have a common ancestor of Runnable.
abstract class InterruptibleTask<T extends @Nullable Object>
    extends AtomicReference<@Nullable Runnable> implements Runnable {
  static {

  @GwtIncompatible // Thread
  private void testSupplierThreadSafe(Function<Supplier<Boolean>, Supplier<Boolean>> memoizer)
      throws Throwable {
    AtomicInteger count = new AtomicInteger(0);
    AtomicReference<Throwable> thrown = new AtomicReference<>(null);
    int numThreads = 3;
    Thread[] threads = new Thread[numThreads];
    long timeout = SECONDS.toNanos(60);

    Supplier<Boolean> supplier =
        new Supplier<Boolean>() {

    public void test_getPermissions_withLdapConfig() {
        // Test with LDAP configuration
        final AtomicBoolean activityHelperCalled = new AtomicBoolean(false);
        final AtomicReference<String[]> rolesFromCallback = new AtomicReference<>();

        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            @Override
            public String getLdapBaseDn() {
                return "dc=example,dc=com";

    public enum State {
        CLOSED, // Normal operation
        OPEN, // Failing, requests blocked
        HALF_OPEN // Testing recovery
    }

    private final String name;
    private final AtomicReference<State> state = new AtomicReference<>(State.CLOSED);
    private final AtomicInteger consecutiveFailures = new AtomicInteger(0);
    private final AtomicInteger halfOpenSuccesses = new AtomicInteger(0);

        assertEquals("ok", FileUtil.readText(fileList.get(0).toFile()));
    }

    public void test_updateSystemProperties() {
        final SystemHelper helper = new SystemHelper();
        final AtomicReference<String> appValue = new AtomicReference<>(StringUtil.EMPTY);
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override

            }
        }, WebConfigService.class.getCanonicalName());
    }

    public void test_sendDocuments() {
        documentSizeByQuery = 0L;
        final AtomicReference<String> sentIndex = new AtomicReference<>();
        final List<Map<String, Object>> sentDocList = new ArrayList<>();
        final SearchEngineClient client = new SearchEngineClient() {
            @Override

    return (type instanceof Class) ? ((Class<?>) type).getName() : type.toString();
  }

  static @Nullable Type getComponentType(Type type) {
    checkNotNull(type);
    AtomicReference<@Nullable Type> result = new AtomicReference<>();
    new TypeVisitor() {
      @Override
      void visitTypeVariable(TypeVariable<?> t) {
        result.set(subtypeOfComponentType(t.getBounds()));
      }

      @Override

         */
        OPEN,

        /**
         * Testing if service has recovered
         */
        HALF_OPEN
    }

    private final String name;
    private final AtomicReference<State> state = new AtomicReference<>(State.CLOSED);
    private final AtomicInteger failureCount = new AtomicInteger(0);
    private final AtomicInteger successCount = new AtomicInteger(0);

    return new ExecutionSequencer();
  }

  /** This reference acts as a pointer tracking the head of a linked list of ListenableFutures. */
  private final AtomicReference<ListenableFuture<@Nullable Void>> ref =
      new AtomicReference<>(immediateVoidFuture());

  @LazyInit private ThreadConfinedTaskQueue latestTaskQueue = new ThreadConfinedTaskQueue();

  /**