.protocols(listOf(Protocol.H2_PRIOR_KNOWLEDGE))
        .build()
    server.useHttps(handshakeCertificates.sslSocketFactory())
    server.enqueue(MockResponse())
    val call = client.newCall(Request(server.url("/")))
    assertFailsWith<UnknownServiceException> {
      call.execute()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("H2_PRIOR_KNOWLEDGE cannot be used with HTTPS")
    }

  }

  /**
   * When the server returns a full response body we will store it and return it regardless of what
   * its Last-Modified date is. This behavior was different prior to OkHttp 3.5 when we would prefer
   * the response with the later Last-Modified date.
   *
   * https://github.com/square/okhttp/issues/2886
   */
  @Test
  fun serverReturnsDocumentOlderThanCache() {