val response1 = call1.execute()
    val response2 = call2.execute()
    assertThat(response1.body.source().readUtf8(3)).isEqualTo("ABC")
    assertThat(response2.body.source().readUtf8(3)).isEqualTo("GHI")
    assertThat(response1.body.source().readUtf8(3)).isEqualTo("DEF")
    assertThat(response2.body.source().readUtf8(3)).isEqualTo("JKL")
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(0)

            final String autoExpandReplicas) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        String source = FileUtil.readUTF8(indexConfigFile);
        String dictionaryPath = System.getProperty("fess.dictionary.path", StringUtil.EMPTY);
        if (StringUtil.isNotBlank(dictionaryPath) && !dictionaryPath.endsWith("/")) {

    connection.writePingAndAwaitPong()
    assertThat(stream.takeHeaders()).isEqualTo(headersOf("a", "android"))
    val source = stream.getSource().buffer()
    assertThat(source.readUtf8(5)).isEqualTo("robot")
    stream.getSink().close()
    assertThat(connection.openStreamCount()).isEqualTo(0)

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

  ) = cacheDir / "$key.$index.tmp"

  private fun readFile(file: Path): String {
    return filesystem.read(file) {
      readUtf8()
    }
  }

  private fun readFileOrNull(file: Path): String? {
    return try {
      filesystem.read(file) {
        readUtf8()
      }
    } catch (_: FileNotFoundException) {
      null
    }
  }

  fun writeFile(
    file: Path,