assertFailsWith<IOException> {
      call.execute()
    }
    val elapsedNanos = System.nanoTime() - startNanos
    assertThat(TimeUnit.NANOSECONDS.toMillis(elapsedNanos).toFloat())
      .isCloseTo(cancelDelayMillis.toFloat(), 100f)
  }

  @Test
  fun cancelImmediatelyAfterEnqueue() {
    server.enqueue(MockResponse())
    val latch = CountDownLatch(1)
    client =
      client.newBuilder()