assertTrue(Range.closed(5, 6).isConnected(Range.closed(3, 5)));
    assertTrue(Range.closed(3, 5).isConnected(Range.openClosed(5, 5)));
    assertTrue(Range.open(3, 5).isConnected(Range.closed(5, 6)));
    assertTrue(Range.closed(3, 7).isConnected(Range.open(6, 8)));
    assertTrue(Range.open(3, 7).isConnected(Range.closed(5, 6)));
    assertFalse(Range.closed(3, 5).isConnected(Range.closed(7, 8)));

    assertTrue(Range.closed(5, 6).isConnected(Range.closed(3, 5)));
    assertTrue(Range.closed(3, 5).isConnected(Range.openClosed(5, 5)));
    assertTrue(Range.open(3, 5).isConnected(Range.closed(5, 6)));
    assertTrue(Range.closed(3, 7).isConnected(Range.open(6, 8)));
    assertTrue(Range.open(3, 7).isConnected(Range.closed(5, 6)));
    assertFalse(Range.closed(3, 5).isConnected(Range.closed(7, 8)));

        add(newCloseables, directExecutor());
      }
    }

    @Override
    public void close() {
      if (closed) {
        return;
      }
      synchronized (this) {
        if (closed) {
          return;
        }
        closed = true;
      }
      for (Map.Entry<AutoCloseable, Executor> entry : entrySet()) {
        closeQuietly(entry.getKey(), entry.getValue());

 *
 *  * **Closing:** one of the peers on the web socket has initiated a graceful shutdown. The web
 *    socket will continue to transmit already-enqueued messages but will refuse to enqueue new
 *    ones.
 *
 *  * **Closed:** the web socket has transmitted all of its messages and has received all messages
 *    from the peer.
 *
 * Web sockets may fail due to HTTP upgrade problems, connectivity problems, or if either peer

    assertEquals(Integer.MAX_VALUE, ms.headMultiset("b", CLOSED).size());
    assertEquals(Integer.MAX_VALUE, ms.headMultiset("a", CLOSED).size());

    assertEquals(3, ms.tailMultiset("c", CLOSED).size());
    assertEquals(Integer.MAX_VALUE, ms.tailMultiset("b", CLOSED).size());
    assertEquals(Integer.MAX_VALUE, ms.tailMultiset("a", CLOSED).size());
  }

  @J2ktIncompatible

    assertThat(sink.getString()).isEqualTo(STRING);
  }

  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");

    }

    private TestCloseable(@Nullable Throwable throwOnClose) {
      this.throwOnClose = throwOnClose;
    }

    boolean isClosed() {
      return closed;
    }

    @Override
    public void close() throws IOException {
      closed = true;
      if (throwOnClose != null) {
        throwIfInstanceOf(throwOnClose, IOException.class);
        throwIfUnchecked(throwOnClose);

    }

    private TestCloseable(@Nullable Throwable throwOnClose) {
      this.throwOnClose = throwOnClose;
    }

    boolean isClosed() {
      return closed;
    }

    @Override
    public void close() throws IOException {
      closed = true;
      if (throwOnClose != null) {
        throwIfInstanceOf(throwOnClose, IOException.class);
        throwIfUnchecked(throwOnClose);

        .isFalse();
    // But its closeable is closed.
    assertClosed(closeable1);

    // Step 2 is cancelled because it wasn't complete.
    assertWithMessage("step2.statusFuture().isCancelled()")
        .that(step2.statusFuture().isCancelled())
        .isTrue();
    // Its closeable is closed.
    assertClosed(closeable2);

    // Step 3 was cancelled before it began

    assertThat(sink.getString()).isEqualTo(STRING);
  }

  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");