val sourceHeaders =
      Headers.Builder()
        .add("A", "aa")
        .add("a", "aa")
        .add("B", "bb")
        .build()
    val headers =
      Headers.Builder()
        .add("A", "a")
        .addAll(sourceHeaders)
        .add("C", "c")
        .build()
    assertThat(headers.toString()).isEqualTo("A: a\nA: aa\na: aa\nB: bb\nC: c\n")
  }

  @Test fun nameIndexesAreStrict() {

    assertThat(parse("http://${name251}a./").toString()).isEqualTo("http://${name251}a./")
    assertThat(parse("http://${name251}aa/").toString()).isEqualTo("http://${name251}aa/")
    assertInvalid("http://${name251}aa./", "Invalid URL host: \"${name251}aa.\"")
  }

  @Test
  fun labelIsEmpty() {
    assertInvalid("http:///", "Invalid URL host: \"\"")

    cache.maxSize = 8
    taskFaker.runNextTask()
    set("a", "aa", "aa")
    set("b", "bb", "bbb")

    // Cause the cache trim job to fail.
    filesystem.setFaultyDelete(cacheDir / "a.0", true)
    taskFaker.runNextTask()

    // Confirm we still allow snapshot reads after a trim failure.
    assertValue("a", "aa", "aa")
    assertValue("b", "bb", "bbb")

    // Allow the test to clean up.

[
  {
    "comment": "Label with hyphens in 3rd and 4th position",
    "input": "aa--",
    "output": "aa--"
  },
  {
    "input": "a†--",
    "output": "xn--a---kp0a"
  },
  {
    "input": "ab--c",
    "output": "ab--c"
  },
  {
    "comment": "Label with leading hyphen",
    "input": "-x",
    "output": "-x"
  },
  {
    "input": "-†",
    "output": "xn----xhn"
  },
  {
    "input": "-x.xn--zca",

  @Test
  fun partialRangeResponsesDoNotCorruptCache() {
    // 1. Request a range.
    // 2. Request a full document, expecting a cache miss.
    server.enqueue(
      MockResponse.Builder()
        .body("AA")
        .code(HttpURLConnection.HTTP_PARTIAL)
        .addHeader("Expires: " + formatDate(1, TimeUnit.HOURS))
        .addHeader("Content-Range: bytes 1000-1001/2000")
        .build(),
    )

1029..102A    ; valid                                  # 3.0  MYANMAR LETTER O..MYANMAR LETTER AU
102B          ; valid                                  # 5.1  MYANMAR VOWEL SIGN TALL AA
102C..1032    ; valid                                  # 3.0  MYANMAR VOWEL SIGN AA..MYANMAR VOWEL SIGN AI
1033..1035    ; valid                                  # 5.1  MYANMAR VOWEL SIGN MON II..MYANMAR VOWEL SIGN E ABOVE

 2.bg 2000.hu 2038.io 2ix.at 2ix.ch 2ix.de 3.azurestaticapps.net 3.bg 32-b.it 3utilities.com 4.bg 4lima.at 4lima.ch 4lima.de 4u.com 5.bg 5g.in 6.bg 611.to 64-b.it 6g.in 7.bg 8.bg 9.bg 9guacu.br a.bg a.prod.fastly.net a.run.app a.se a.ssl.fastly.net aa.no aaa aaa.pro aarborte.no aarp ab.ca abarth abashiri.hokkaido.jp abb abbott abbvie abc abc.br abeno.osaka.jp abiko.chiba.jp abira.hokkaido.jp abkhazia.su able abo.pa abogado abr.it abruzzo.it abu.yamaguchi.jp abudhabi ac ac.ae ac.at ac.be ac.ci ac.cn...

// counties
aa.no
ah.no
bu.no
fm.no
hl.no
hm.no
jan-mayen.no
mr.no
nl.no
nt.no
of.no
ol.no
oslo.no
rl.no
sf.no
st.no
svalbard.no
tm.no
tr.no
va.no
vf.no
// primary and lower secondary schools per county
gs.aa.no
gs.ah.no
gs.bu.no
gs.fm.no
gs.hl.no
gs.hm.no