val response = newResponse(responseBody("abcdef"))
    val p1 = response.peekBody(4)
    val p2 = response.peekBody(2)
    assertThat(response.body.string()).isEqualTo("abcdef")
    assertThat(p1.string()).isEqualTo("abcd")
    assertThat(p2.string()).isEqualTo("ab")
  }

  @Test fun negativeStatusCodeThrowsIllegalStateException() {
    assertFailsWith<IllegalStateException> {
      newResponse(responseBody("set status code -1"), -1)

        .body("abc")
        .build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .code(HttpURLConnection.HTTP_OK)
        .addHeader("ETag: v2")
        .body("abd")
        .build(),
    )
    var call =
      client.newCall(
        Request
          .Builder()
          .url(server.url("/"))
          .build(),
      )

    assertThat(response1.body.string()).isEqualTo("abcd")
    val response2 = get(server.url("/"))
    assertThat(response2.header("Alpha")).isEqualTo("α")
    assertThat(response2.header("β")).isEqualTo("Beta")
    assertThat(response2.header("Gamma")).isEqualTo("Γ")
    assertThat(response2.header("Δ")).isEqualTo("Delta")
    assertThat(response2.body.string()).isEqualTo("abcd")
  }

  @Test

  }

  @Test
  fun hostnameLowercaseCharactersMappedDirectly() {
    assertThat(parse("http://abcd").host).isEqualTo("abcd")
    assertThat(parse("http://σ").host).isEqualTo("xn--4xa")
  }

  @Test
  fun hostnameUppercaseCharactersConvertedToLowercase() {
    assertThat(parse("http://ABCD").host).isEqualTo("abcd")
    assertThat(parse("http://Σ").host).isEqualTo("xn--4xa")
  }

  @Test

    assertTrue(emptyConcat.isEmpty());
  }

  public void testConcat_infiniteIterable() throws IOException {
    CharSource source = CharSource.wrap("abcd");
    Iterable<CharSource> cycle = Iterables.cycle(ImmutableList.of(source));
    CharSource concatenated = CharSource.concat(cycle);

    String expected = "abcdabcd";

    assertTrue(emptyConcat.isEmpty());
  }

  public void testConcat_infiniteIterable() throws IOException {
    CharSource source = CharSource.wrap("abcd");
    Iterable<CharSource> cycle = Iterables.cycle(ImmutableList.of(source));
    CharSource concatenated = CharSource.concat(cycle);

    String expected = "abcdabcd";

    assertThat(bodyToHex(body), "Retransmit body").isEqualTo("616263")
  }

  @Test
  fun byteArrayRange() {
    val contentType = "text/plain".toMediaType()
    val body: RequestBody = ".abcd".toByteArray().toRequestBody(contentType, 1, 3)
    assertThat(body.contentType()).isEqualTo(contentType)
    assertThat(body.contentLength()).isEqualTo(3)
    assertThat(bodyToHex(body)).isEqualTo("616263")

    client =
      client
        .newBuilder()
        .cache(cache)
        .build()
    server.enqueue(
      MockResponse(
        headers = headersOf("cache-control", "max-age=60"),
        body = "ABCD",
      ),
    )
    server.enqueue(
      MockResponse(
        headers = headersOf("cache-control", "max-age=60"),
        body = "EFGH",
      ),
    )

2CBB          ; valid                                  # 4.1  COPTIC SMALL LETTER DIALECT-P NI
2CBC          ; mapped                 ; 2CBD          # 4.1  COPTIC CAPITAL LETTER CRYPTOGRAMMIC NI
2CBD          ; valid                                  # 4.1  COPTIC SMALL LETTER CRYPTOGRAMMIC NI
2CBE          ; mapped                 ; 2CBF          # 4.1  COPTIC CAPITAL LETTER OLD COPTIC OOU

GAMlB,OAAOmjB,EAIR,IAAII,GAAiB,sBAErB,SAASC,KACR,OAAO,EAGR,SAASC,KACR,OAAO,EAGR,SAASC,GAAI1jB,EAAM2jB,EAAOlkB,EAAUoe,EAAMle,EAAIikB,GAC7C,IAAIC,EAAQ3lB,EAGZ,GAAsB,iBAAVylB,EAAqB,CAShC,IAAMzlB,IANmB,iBAAbuB,IAGXoe,EAAOA,GAAQpe,EACfA,OAAW+C,GAEEmhB,EACbD,GAAI1jB,EAAM9B,EAAMuB,EAAUoe,EAAM8F,EAAOzlB,GAAQ0lB,GAEhD,OAAO5jB,EAsBR,GAnBa,MAAR6d,GAAsB,MAANle,GAGpBA,EAAKF,EACLoe,EAAOpe,OAAW+C,GACD,MAAN7C,IACc,iBAAbF,GAGXE,EAAKke,EACLA,OAAOrb,IAIP7C,EAAKke,EACLA,EAAOpe,EACPA,OAAW+C,KAGD,IAAP7C,EACJA,EAAK8jB...