private static async Task <int> EstablishConnectionAndProcessOneRequestAsync(HttpClient client, Http2LoopbackServer server)
{
// Establish connection and send initial request/response to ensure connection is available for subsequent use
Task <HttpResponseMessage> sendTask = client.GetAsync(server.Address);
await server.EstablishConnectionAsync();
int streamId = await server.ReadRequestHeaderAsync();
await server.SendDefaultResponseAsync(streamId);
HttpResponseMessage response = await sendTask;
Assert.Equal(HttpStatusCode.OK, response.StatusCode);
Assert.Equal(0, (await response.Content.ReadAsByteArrayAsync()).Length);
return(streamId);
}