feat: Test writing and reading

moxxmpp_socket/integration_test/test_wrong_host.dart

@@ -1,21 +1,25 @@
+import 'dart:convert';
 import 'dart:io';
+import 'dart:typed_data';
 import 'package:moxxmpp_socket/src/ssl.dart';
 
 void main(List<String> argv) async {
-  if (argv.length != 2) {
+  if (argv.length < 2) {
     print('Usage: test_wrong_host.dart server-addr host-name');
     exit(1);
   }
 
   final server = argv[0];
   final hostname = argv[1];
+  final port = argv.length == 3 ? argv[2] : '5223';
+
   final ctx = MbedSockCtx('/etc/ssl/certs/');
   final sock = MbedSock(ctx);
 
-  print('Connecting...');
+  print('Connecting to $server:$port while indicating $hostname...');
   final done = sock.connectSecure(
     server,
-    '5223',
+    port,
     alpn: 'xmpp-client',
     hostname: hostname,
   );
@@ -23,6 +27,22 @@ void main(List<String> argv) async {
   print('Success? $done');
   print('Secure? ${sock.isSecure()}');
 
+  final write = sock.write(
+    "<?xml version='1.0'?><stream:stream to='$hostname' version='1.0' xml:lang='en' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams'>"
+  );
+  print('Write: $write');
+
+  Uint8List? read = Uint8List(0);
+  do {
+    read = sock.read();
+    if (read != null) {
+      final str = utf8.decode(read);
+      print('Read: $str');
+    } else {
+      print('Read: Null');
+    }
+  } while (read != null);
+  
   sock.free();
   ctx.free();
   print('OKAY');