*
 * <pre>{@code
 * FluentFuture<UserName> userName =
 *     ClosingFuture.submit(
 *             closer -> closer.eventuallyClose(database.newTransaction(), closingExecutor),
 *             executor)
 *         .transformAsync((closer, transaction) -> transaction.queryClosingFuture("..."), executor)
 *         .transform((closer, result) -> result.get("userName"), directExecutor())

// arrives or the write end is closed.
// If the write end is closed with an error, that error is
// returned as err; otherwise err is EOF.
func (r *PipeReader) Read(data []byte) (n int, err error) {
	return r.pipe.read(data)
}

// Close closes the reader; subsequent writes to the
// write half of the pipe will return the error [ErrClosedPipe].
func (r *PipeReader) Close() error {
	return r.CloseWithError(nil)
}

	return len(buf), nil
}

func (rc *signalingNopWriteCloser) Close() error {
	close(rc.closed)
	return rc.ReadCloser.Close()
}

// Test whether server properly closes connection when processing slow
// requests
func TestSlowRequest(t *testing.T) {
	pr, pw := io.Pipe()

	writerDone := make(chan struct{})
	go func() {
		for _, buf := range [][]byte{
			streamBeginTypeStdin,

 *
 * <pre>{@code
 * FluentFuture<UserName> userName =
 *     ClosingFuture.submit(
 *             closer -> closer.eventuallyClose(database.newTransaction(), closingExecutor),
 *             executor)
 *         .transformAsync((closer, transaction) -> transaction.queryClosingFuture("..."), executor)
 *         .transform((closer, result) -> result.get("userName"), directExecutor())

   *
   * @param inputStream the input stream to be closed, or {@code null} in which case this method
   *     does nothing
   * @since 17.0
   */
  public static void closeQuietly(@CheckForNull InputStream inputStream) {
    try {
      close(inputStream, true);
    } catch (IOException impossible) {
      throw new AssertionError(impossible);
    }
  }

  /**

        then:
        input.closed
    }

    def "closes input on subsequent use"() {
        given:
        def input = new TestInputStream()

        when:
        target.readFrom(new ByteArrayInputStream([] as byte[]))
        target.readFrom(input)

        then:
        thrown IllegalStateException
        input.closed
    }

    def "closes input on error"() {
        given:

    checkNotNull(sink);

    Closer closer = Closer.create();
    try {
      Reader reader = closer.register(openStream());
      Writer writer = closer.register(sink.openStream());
      return CharStreams.copy(reader, writer);
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {
      closer.close();
    }
  }

  /**

        boolean closed
        boolean error

        @Override
        void write(int b) throws IOException {
            if (error) {
                throw new IOException("bang!")
            }
        }

        @Override
        void close() throws IOException {
            closed = true
        }
    }

    def "closes output"() {
        given:

   *
   * @param inputStream the input stream to be closed, or {@code null} in which case this method
   *     does nothing
   * @since 17.0
   */
  public static void closeQuietly(@CheckForNull InputStream inputStream) {
    try {
      close(inputStream, true);
    } catch (IOException impossible) {
      throw new AssertionError(impossible);
    }
  }

  /**

    checkNotNull(sink);

    Closer closer = Closer.create();
    try {
      Reader reader = closer.register(openStream());
      Writer writer = closer.register(sink.openStream());
      return CharStreams.copy(reader, writer);
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {
      closer.close();
    }
  }

  /**