if (ATOMIC_HELPER.casValue(this, null, valueToSet)) {
      complete(this, /*callInterruptTask=*/ false);
      return true;
    }
    return false;
  }

  /**
   * Sets the failed result of this {@code Future} unless this {@code Future} has already been
   * cancelled or set (including {@linkplain #setFuture set asynchronously}). When a call to this

                executor);
    assertFinallyFailsWithException(closingFuture);
    waitUntilClosed(closingFuture);
    assertClosed(closeable1, closeable2);
  }

  public void testTransformAsync_failed() throws Exception {
    ClosingFuture<Object> closingFuture =
        ClosingFuture.from(immediateFuture("value"))
            .transformAsync(
                new AsyncClosingFunction<String, Object>() {

   * primary input fails with the given {@code exceptionType}, from the result provided by the
   * {@code fallback}. {@link Function#apply} is not invoked until the primary input has failed, so
   * if the primary input succeeds, it is never invoked. If, during the invocation of {@code
   * fallback}, an exception is thrown, this exception is used as the result of the output {@code
   * Future}.
   *

                executor);
    assertFinallyFailsWithException(closingFuture);
    waitUntilClosed(closingFuture);
    assertClosed(closeable1, closeable2);
  }

  public void testTransformAsync_failed() throws Exception {
    ClosingFuture<Object> closingFuture =
        ClosingFuture.from(immediateFuture("value"))
            .transformAsync(
                new AsyncClosingFunction<String, Object>() {