assertThat(stream1.writeBytesMaximum)
      .isEqualTo(Settings.DEFAULT_INITIAL_WINDOW_SIZE.toLong())

    // Another stream should be able to send data even though 1 is blocked.
    val stream2 = connection.newStream(headerEntries("b", "banana"), true)
    val out2 = stream2.sink.buffer()
    out2.writeUtf8("foo")
    out2.flush()
    assertThat(connection.writeBytesTotal)