.containsExactlyInAnyOrder(a1, a2)
    assertThat(dispatcher.queuedCalls()).isEmpty()

    // Cancel some calls. That doesn't impact running or queued.
    a2.cancel()
    a3.cancel()
    assertThat(dispatcher.runningCalls())
      .containsExactlyInAnyOrder(a1, a2)
    assertThat(dispatcher.queuedCalls()).isEmpty()

    // Let the calls finish.
    waiting.countDown()
    t1.join()

    dispatcher.maxRequestsPerHost = 0
    val executorService: ExecutorService = dispatcher.executorService
    dispatcher.idleCallback = Runnable { ({ TODO() })() }
    val queuedCalls: List<Call> = dispatcher.queuedCalls()
    val runningCalls: List<Call> = dispatcher.runningCalls()
    val queuedCallsCount: Int = dispatcher.queuedCallsCount()
    val runningCallsCount: Int = dispatcher.runningCallsCount()