val request = server.takeRequest()
    assertThat(request.requestLine).isEqualTo("HEAD /foo HTTP/2")
  }

  @ParameterizedTest
  @ArgumentsSource(ProtocolParamProvider::class)
  fun emptyResponse(protocol: Protocol) {
    setUp(protocol)
    server.enqueue(MockResponse())
    val call = client.newCall(Request(server.url("/foo")))
    val response = call.execute()