callback.await(request2.url).assertCode(200).assertBody("B")
    assertThat(server.takeRequest().headers["If-None-Match"]).isEqualTo("v1")
  }

  @Test
  fun onlyIfCachedReturns504WhenNotCached() {
    executeSynchronously("/", "Cache-Control", "only-if-cached")
      .assertCode(504)
      .assertBody("")
      .assertNoNetworkResponse()
      .assertNoCacheResponse()
  }