* If there are already enough connections, we're done.
   * If not, we create one and then schedule the task to run again immediately.
   */
  private fun openConnections(state: AddressState): Long {
    // This policy does not require minimum connections, don't run again
    if (state.policy.minimumConcurrentCalls == 0) return -1L

    var concurrentCallCapacity = 0
    for (connection in connections) {

                readBytes.update(acknowledged = unacknowledgedBytesRead)
              }
            } else if (!finished && errorExceptionToDeliver == null) {
              // Nothing to do. Wait until that changes then try again.
              waitForIo()
              tryAgain = true
            }
          } finally {
            if (doReadTimeout) {
              readTimeout.exitAndThrowIfTimedOut()
            }
          }

import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertNull

class PunycodeTest {
  /** https://datatracker.ietf.org/doc/html/rfc3492#section-7.1 */
  @Test fun rfc3492Samples() {
    // (A) Arabic (Egyptian)
    testEncodeDecode(
      unicode = "ليهمابتكلموشعربي؟",
      punycode = "xn--egbpdaj6bu4bxfgehfvwxn",
    )

    // (B) Chinese (simplified)
    testEncodeDecode(
      unicode = "他们为什么不说中文",

      MockResponse(body = "This is the 2nd server, again!"),
    )
    server.enqueue(
      MockResponse(
        code = HttpURLConnection.HTTP_MOVED_TEMP,
        headers = headersOf("Location", server2.url("/").toString()),
        body = "This page has moved!",
      ),
    )
    server.enqueue(
      MockResponse(body = "This is the first server again!"),
    )

 *  New: `OkHttpClient.x509TrustManager` accessor.
 *  New: Permit [new WebSocket response codes][iana_websocket]: 1012 (Service Restart), 1013 (Try
    Again Later), and 1014 (invalid response from the upstream).
 *  New: Build with Kotlin 1.3.41, BouncyCastle 1.62, and Conscrypt 2.2.1.
 *  Fix: Recover gracefully when a coalesced connection immediately goes unhealthy.

0656..0658    ; valid                                  # 4.0  ARABIC SUBSCRIPT ALEF..ARABIC MARK NOON GHUNNA
0659..065E    ; valid                                  # 4.1  ARABIC ZWARAKAY..ARABIC FATHA WITH TWO DOTS
065F          ; valid                                  # 6.0  ARABIC WAVY HAMZA BELOW
0660..0669    ; valid                                  # 1.1  ARABIC-INDIC DIGIT ZERO..ARABIC-INDIC DIGIT NINE

   0080-009F; [CONTROL CHARACTERS]
   06DD; ARABIC END OF AYAH
   070F; SYRIAC ABBREVIATION MARK
   180E; MONGOLIAN VOWEL SEPARATOR
   200C; ZERO WIDTH NON-JOINER
   200D; ZERO WIDTH JOINER
   2028; LINE SEPARATOR
   2029; PARAGRAPH SEPARATOR
   2060; WORD JOINER
   2061; FUNCTION APPLICATION
   2062; INVISIBLE TIMES
   2063; INVISIBLE SEPARATOR
   206A-206F; [CONTROL CHARACTERS]
   FEFF; ZERO WIDTH NO-BREAK SPACE

      "FINE: Q10000 scheduled after 100 µs: task",
      "FINE: Q10000 starting              : task",
      "FINE: Q10000 run again after  50 µs: task",
      "FINE: Q10000 finished run in   0 µs: task",
      "FINE: Q10000 starting              : task",
      "FINE: Q10000 run again after 150 µs: task",
      "FINE: Q10000 finished run in   0 µs: task",
      "FINE: Q10000 starting              : task",

рф

// xn--wgbl6a ("Qatar", Arabic) : QA
// http://www.ict.gov.qa/
قطر

// xn--mgberp4a5d4ar ("AlSaudiah", Arabic) : SA
// http://www.nic.net.sa/
السعودية

// xn--mgberp4a5d4a87g ("AlSaudiah", Arabic, variant)  : SA
السعودیة

// xn--mgbqly7c0a67fbc ("AlSaudiah", Arabic, variant) : SA
السعودیۃ

// xn--mgbqly7cvafr ("AlSaudiah", Arabic, variant) : SA
السعوديه

    Thread.sleep(TimeUnit.NANOSECONDS.toMillis(Http2Connection.DEGRADED_PONG_TIMEOUT_NS.toLong()))
    assertThat(connection.isHealthy(System.nanoTime())).isFalse()

    // When a pong does arrive, the connection becomes healthy again.
    connection.writePingAndAwaitPong()
    assertThat(connection.isHealthy(System.nanoTime())).isTrue()

    // Verify the peer received what was expected.