client.newWebSocket(newRequest("http://a/3"), webSocketListener)
    executor.assertJobs("http://a/1", "http://a/2", "http://a/3")
  }

  @Test
  fun increasingMaxRequestsPromotesJobsImmediately() {
    dispatcher.maxRequests = 2
    client.newCall(newRequest("http://a/1")).enqueue(callback)
    client.newCall(newRequest("http://b/1")).enqueue(callback)

     * Returns true if none of the Vary headers have changed between [cachedRequest] and
     * [newRequest].
     */
    fun varyMatches(
      cachedResponse: Response,
      cachedRequest: Headers,
      newRequest: Request,
    ): Boolean =
      cachedResponse.headers.varyFields().none {
        cachedRequest.values(it) != newRequest.headers(it)
      }