mapEntry(Range.closedOpen(3, 5), "frisbee"),
                        mapEntry(Range.atMost(-1), "fruitcake"),
                        mapEntry(Range.open(10, 15), "elephant"),
                        mapEntry(Range.closed(20, 22), "umbrella"));
                  }

                  @Override
                  public Map<Range<Integer>, String> create(Object... elements) {

    val stream = connection.newStream(headerEntries("b", "banana"), true)
    val out = stream.sink.buffer()
    out.writeUtf8("c3po")
    out.close()
    stream.writeHeaders(headerEntries("e", "elephant"), false, false)
    connection.writePingAndAwaitPong()
    assertThat(connection.openStreamCount()).isEqualTo(0)

    // Verify the peer received what was expected.
    val synStream = peer.takeFrame()