else -> {
              connectionUser.acquireConnectionNoEvents(connection)
              true
            }
          }
        }
      if (!acquired) continue

      // Confirm the connection is healthy and return it.
      if (connection.isHealthy(doExtensiveHealthChecks)) return connection

      // In the second synchronized block, release the unhealthy acquired connection. We're also on

      assertThat(response.code).isEqualTo(200)
      assertThat(response.socket).isNull()
      assertThat(response.body.string()).isEqualTo("normal request")
    }
    // Confirm there's no RequestBodyStart/RequestBodyEnd on failed upgrades.
    assertThat(listener.recordedEventTypes()).containsExactly(
      "CallStart",
      "ProxySelectStart",
      "ProxySelectEnd",
      "DnsStart",

   * The following methods are safe to call as long as both of the following hold:
   *
   * - allocArrays() has been called. Callers can confirm this by checking needsAllocArrays().
   *
   * - The map has not switched to delegating to a java.util implementation to mitigate hash
   *   flooding. Callers can confirm this by null-checking delegateOrNull().
   *

  private val forbiddenLocks = mutableSetOf<Any>()

  /** The timestamp of the last taken event, used to measure elapsed time between events. */
  private var lastTimestampNs: Long? = null

  /** Confirm that the thread does not hold a lock on `lock` during the callback. */
  fun forbidLock(lock: Any) {
    forbiddenLocks.add(lock)
  }

  /**

    server.protocols = Arrays.asList(Protocol.HTTP_2, Protocol.HTTP_1_1)
    timeToFirstByte()
  }

  /**
   * Test to confirm that events are reported at the time they occur and no earlier and no later.
   * This inserts a bunch of synthetic 250 ms delays into both client and server and confirms that
   * the same delays make it back into the events.
   *

    routeSelector = newRouteSelector(address)

    // Confirm we enumerate both proxies, giving preference to the route from ProxyB.
    val selection2 = routeSelector.next()
    dns.assertRequests(PROXY_A_HOST, PROXY_B_HOST)
    assertRoute(selection2.next(), address, proxyB, dns.lookup(PROXY_B_HOST, 0), PROXY_B_PORT)
    assertThat(selection2.hasNext()).isFalse()

    // Confirm the last selection contains the postponed route from ProxyA.

import okhttp3.internal.http.RecordingProxySelector
import okhttp3.tls.HandshakeCertificates
import okhttp3.tls.internal.TlsUtil.localhost

/**
 * OkHttp is usually tested with functional tests: these use public APIs to confirm behavior against
 * MockWebServer. In cases where logic is particularly tricky, we use unit tests. This class makes
 * it easy to get sample values to use in such tests.
 *

    assertThat(request.tag(String::class)).isSameAs(stringTag)

    // TODO check for Jvm or handle Long/long correctly
//    assertThat(request.tag(Long::class)).isSameAs(longTag)
  }

  /** Confirm that we don't accidentally share the backing map between objects. */
  @Test
  fun tagsAreImmutable() {
    val builder =
      Request
        .Builder()
        .url("https://square.com")

        .method("POST", requestBody2)
        .build()
    val response2 = client.newCall(request2).execute()
    assertThat(response2.code).isEqualTo(200)

    // Use sequence numbers to confirm the connection was pooled.
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(0)
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(1)
  }

  @Test

  private val forbiddenLocks = mutableListOf<Any>()

  /** The timestamp of the last taken event, used to measure elapsed time between events. */
  private var lastTimestampNs: Long? = null

  /** Confirm that the thread does not hold a lock on `lock` during the callback. */
  fun forbidLock(lock: Any) {
    forbiddenLocks.add(lock)
  }

  /**