throwIf(closed);
    throwIf(SKIP_THROWS);
    return in.skip(n);
  }

  @Override
  public int available() throws IOException {
    throwIf(closed);
    return options.contains(TestOption.AVAILABLE_ALWAYS_ZERO) ? 0 : in.available();
  }

  @Override
  public void close() throws IOException {
    closed = true;
    throwIf(CLOSE_THROWS);
    in.close();
  }

   * most [BufferedSource] instances, but not of [Buffer].
   */
  private fun responseBody(content: String): ResponseBody {
    val data = Buffer().writeUtf8(content)
    val source: Source =
      object : Source {
        var closed = false

        override fun close() {
          closed = true
        }

        override fun read(

      return webSocket!!.processNextFrame()
    }

    override fun close() {
      if (closed) {
        throw AssertionError("Already closed")
      }
      try {
        source.close()
      } catch (ignored: IOException) {
      }
      try {
        sink.close()
      } catch (ignored: IOException) {
      }
      closed = true
    }

    override fun cancel() {
      canceled = true

        else -> minOf(maxResult, delimiterIndex)
      }
    }

    @Throws(IOException::class)
    override fun close() {
      if (closed) return
      closed = true
      currentPart = null
      source.close()
    }

    /** A single part in a multipart body. */
    class Part(
      @get:JvmName("headers") val headers: Headers,

// and it is flake-prone to check for closure after calling it, this retries for a bit to make
// sure the netns is closed eventually.
func assertNSClosed(t *testing.T, closed *atomic.Bool) {
	for i := 0; i < 5; i++ {
		if closed.Load() {
			return
		}
		time.Sleep(1 * time.Second)
	}
	t.Fatal("NS not closed")

 * stream was closed. Intended for use in a test where only a single stream should be opened and
 * possibly closed.
 *
 * @author Colin Decker
 */
public interface TestStreamSupplier {

  /** Returns whether or not a new stream was opened. */
  boolean wasStreamOpened();

  /** Returns whether or not an open stream was closed. */
  boolean wasStreamClosed();

 * stream was closed. Intended for use in a test where only a single stream should be opened and
 * possibly closed.
 *
 * @author Colin Decker
 */
public interface TestStreamSupplier {

  /** Returns whether or not a new stream was opened. */
  boolean wasStreamOpened();

  /** Returns whether or not an open stream was closed. */
  boolean wasStreamClosed();

    ClosingFuture<Closeable> closingFuture =
        ClosingFuture.submit(
            new ClosingCallable<Closeable>() {
              @Override
              public Closeable call(DeferredCloser closer) throws Exception {
                return closer.eventuallyClose(mockCloseable, executor);
              }
            },
            executor);
    closingFuture.finishToValueAndCloser(

    this.withLock {
      cancel = !source.finished && source.closed && (sink.finished || sink.closed)
      open = isOpen
    }
    if (cancel) {
      // RST this stream to prevent additional data from being sent. This is safe because the input
      // stream is closed (we won't use any further bytes) and the output stream is either finished
      // or closed (so RSTing both streams doesn't cause harm).

    assertEquals(STRING, sink.getString());
  }

  public void testWriteFromStream_doesNotCloseThatStream() throws IOException {
    TestReader in = new TestReader();
    assertFalse(in.closed());
    sink.writeFrom(in);
    assertFalse(in.closed());
  }

  public void testWriteLines_withSpecificSeparator() throws IOException {
    sink.writeLines(ImmutableList.of("foo", "bar", "baz"), "\n");