tests: Fix tests

packages/moxxmpp/lib/src/roster/roster.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'package:moxxmpp/src/jid.dart';
+import 'package:moxxmpp/src/managers/attributes.dart';
 import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
@@ -66,11 +67,17 @@ class RosterFeatureNegotiator extends XmppFeatureNegotiatorBase {
 
 /// This manager requires a RosterFeatureNegotiator to be registered.
 class RosterManager extends XmppManagerBase {
-  RosterManager(this._stateManager) : super() {
+  RosterManager(this._stateManager) : super();
-    _stateManager.register(getAttributes().sendEvent);
+
-  }
+  /// The class managing the entire roster state.
   final BaseRosterStateManager _stateManager;
 
+  @override
+  void register(XmppManagerAttributes attributes) {
+    super.register(attributes);
+    _stateManager.register(attributes.sendEvent); 
+  }
+  
   @override
   String getId() => rosterManager;
 

packages/moxxmpp/test/negotiator_test.dart

@@ -61,7 +61,7 @@ void main() {
     ])
     ..registerManagers([
       PresenceManager('http://moxxmpp.example'),
-      RosterManager(),
+      RosterManager(TestingRosterStateManager('', [])),
       DiscoManager(),
       PingManager(),
     ])

packages/moxxmpp/test/xeps/xep_0198_test.dart

@@ -243,7 +243,7 @@ void main() {
       final sm = StreamManagementManager();
       conn.registerManagers([
           PresenceManager('http://moxxmpp.example'),
-          RosterManager(),
+          RosterManager(TestingRosterStateManager('', [])),
           DiscoManager(),
           PingManager(),
           sm,
@@ -365,7 +365,7 @@ void main() {
       final sm = StreamManagementManager();
       conn.registerManagers([
           PresenceManager('http://moxxmpp.example'),
-          RosterManager(),
+          RosterManager(TestingRosterStateManager('', [])),
           DiscoManager(),
           PingManager(),
           sm,
@@ -519,7 +519,7 @@ void main() {
       ),);
       conn.registerManagers([
           PresenceManager('http://moxxmpp.example'),
-          RosterManager(),
+          RosterManager(TestingRosterStateManager('', [])),
           DiscoManager(),
           PingManager(),
           StreamManagementManager(),
@@ -611,7 +611,7 @@ void main() {
       ),);
       conn.registerManagers([
           PresenceManager('http://moxxmpp.example'),
-          RosterManager(),
+          RosterManager(TestingRosterStateManager('', [])),
           DiscoManager(),
           PingManager(),
           StreamManagementManager(),
@@ -703,7 +703,7 @@ void main() {
       ),);
       conn.registerManagers([
           PresenceManager('http://moxxmpp.example'),
-          RosterManager(),
+          RosterManager(TestingRosterStateManager('', [])),
           DiscoManager(),
           PingManager(),
           StreamManagementManager(),

packages/moxxmpp/test/xmpp_test.dart

@@ -7,7 +7,7 @@ import 'helpers/xmpp.dart';
 /// Returns true if the roster manager triggeres an event for a given stanza
 Future<bool> testRosterManager(String bareJid, String resource, String stanzaString) async {
   var eventTriggered = false;
-  final roster = RosterManager();
+  final roster = RosterManager(TestingRosterStateManager('', []));
   roster.register(XmppManagerAttributes(
       sendStanza: (_, { StanzaFromType addFrom = StanzaFromType.full, bool addId = true, bool retransmitted = false, bool awaitable = true, bool encrypted = false }) async => XMLNode(tag: 'hallo'),
       sendEvent: (event) {
@@ -127,7 +127,7 @@ void main() {
       ),);
       conn.registerManagers([
         PresenceManager('http://moxxmpp.example'),
-        RosterManager(),
+        RosterManager(TestingRosterStateManager('', [])),
         DiscoManager(),
         PingManager(),
         StreamManagementManager(),
@@ -181,7 +181,7 @@ void main() {
       ),);
       conn.registerManagers([
         PresenceManager('http://moxxmpp.example'),
-        RosterManager(),
+        RosterManager(TestingRosterStateManager('', [])),
         DiscoManager(),
         PingManager(),
       ]);
@@ -235,7 +235,7 @@ void main() {
       ),);
       conn.registerManagers([
         PresenceManager('http://moxxmpp.example'),
-        RosterManager(),
+        RosterManager(TestingRosterStateManager('', [])),
         DiscoManager(),
         PingManager(),
       ]);
@@ -290,7 +290,7 @@ void main() {
       ),);
       conn.registerManagers([
         PresenceManager('http://moxxmpp.example'),
-        RosterManager(),
+        RosterManager(TestingRosterStateManager('', [])),
         DiscoManager(),
         PingManager(),
       ]);
@@ -308,7 +308,7 @@ void main() {
   group('Test roster pushes', () {
       test('Test for a CVE-2015-8688 style vulnerability', () async {
           var eventTriggered = false;
-          final roster = RosterManager();
+          final roster = RosterManager(TestingRosterStateManager('', []));
           roster.register(XmppManagerAttributes(
               sendStanza: (_, { StanzaFromType addFrom = StanzaFromType.full, bool addId = true, bool retransmitted = false, bool awaitable = true, bool encrypted = false }) async => XMLNode(tag: 'hallo'),
               sendEvent: (event) {