anchor.diff:    ..setTrustedCertificates(localFile('certificates/trusted_certs.pem'));
   
   void testSimpleBind() {
  +  print("asyncStart testSimpleBind");
     asyncStart();
     RawSecureServerSocket.bind(HOST, 0, serverContext).then((s) {
       Expect.isTrue(s.port > 0);
       s.close();
  +    print("asyncEnd testSimpleBind");
       asyncEnd();
     });
   }
  
positive.code: 
      connectClient(server.port).then(runClient).then((socket) {
        socket.close();
        asyncEnd();
      });
    }
  
negative.code: }
  
  main() {
    print("asyncStart main");
    asyncStart();
    InternetAddress.lookup("localhost").then((hosts) {
      HOST = hosts.first;
      runTests();
      print("asyncEnd main");
      asyncEnd();
    });
  }
  