feat: Make moxxmpp docs buildable using flakes

packages/moxxmpp_socket_tcp/integration_test/failure_reconnection_test.dart

@@ -0,0 +1,98 @@
+import 'package:logging/logging.dart';
+import 'package:moxxmpp/moxxmpp.dart';
+import 'package:moxxmpp_socket_tcp/moxxmpp_socket_tcp.dart';
+import 'package:test/test.dart';
+
+void main() {
+  Logger.root.level = Level.ALL;
+  Logger.root.onRecord.listen((record) {
+    print('${record.level.name}: ${record.time}: ${record.message}');
+  });
+  final log = Logger('FailureReconnectionTest');
+
+  test('Failing an awaited connection with TestingSleepReconnectionPolicy', () async {
+    var errors = 0;
+    final connection = XmppConnection(
+      TestingSleepReconnectionPolicy(10),
+      TCPSocketWrapper(false),
+    );
+    connection.registerFeatureNegotiators([
+      StartTlsNegotiator(),
+    ]);
+    connection.registerManagers([
+      DiscoManager(),
+      RosterManager(),
+      PingManager(),
+      MessageManager(),
+      PresenceManager('http://moxxmpp.example'),
+    ]);
+    connection.asBroadcastStream().listen((event) {
+      if (event is ConnectionStateChangedEvent) {
+        if (event.state == XmppConnectionState.error) {
+          errors++;
+        }
+      }
+    });
+
+    connection.setConnectionSettings(
+      ConnectionSettings(
+        jid: JID.fromString('testuser@no-sasl.badxmpp.eu'),
+        password: 'abc123',
+        useDirectTLS: true,
+        allowPlainAuth: true,
+      ),
+    );
+
+    final result = await connection.connectAwaitable();
+    log.info('Connection failed as expected');
+    expect(result.success, false);
+    expect(errors, 1);
+
+    log.info('Waiting 20 seconds for unexpected reconnections');
+    await Future.delayed(const Duration(seconds: 20));
+    expect(errors, 1);
+  }, timeout: Timeout.factor(2));
+
+  test('Failing an awaited connection with ExponentialBackoffReconnectionPolicy', () async {
+    var errors = 0;
+    final connection = XmppConnection(
+      ExponentialBackoffReconnectionPolicy(1),
+      TCPSocketWrapper(false),
+    );
+    connection.registerFeatureNegotiators([
+      StartTlsNegotiator(),
+    ]);
+    connection.registerManagers([
+      DiscoManager(),
+      RosterManager(),
+      PingManager(),
+      MessageManager(),
+      PresenceManager('http://moxxmpp.example'),
+    ]);
+    connection.asBroadcastStream().listen((event) {
+      if (event is ConnectionStateChangedEvent) {
+        if (event.state == XmppConnectionState.error) {
+          errors++;
+        }
+      }
+    });
+
+    connection.setConnectionSettings(
+      ConnectionSettings(
+        jid: JID.fromString('testuser@no-sasl.badxmpp.eu'),
+        password: 'abc123',
+        useDirectTLS: true,
+        allowPlainAuth: true,
+      ),
+    );
+
+    final result = await connection.connectAwaitable();
+    log.info('Connection failed as expected');
+    expect(result.success, false);
+    expect(errors, 1);
+
+    log.info('Waiting 20 seconds for unexpected reconnections');
+    await Future.delayed(const Duration(seconds: 20));
+    expect(errors, 1);
+  }, timeout: Timeout.factor(2));
+}