fix set_event_notifier to respect the argument

opcua/common/node.py

@@ -103,9 +103,9 @@ class Node(object):
         set event notifier attribute,
         arg is a list of EventNotifier Enum
         """
-        res = 1
+        res = 0
         for en in enum_list:
-            ua.set_bit(res, en.value)
+            res = ua.set_bit(res, en.value)
         self.set_attribute(ua.AttributeIds.EventNotifier, ua.DataValue(ua.Variant(res, ua.VariantType.Byte)))
 
     def get_node_class(self):

tests/tests_server.py

@@ -409,7 +409,7 @@ def check_eventgenerator_SourceServer(test, evgen):
     server = test.opc.get_server_node()
     test.assertEqual(evgen.event.SourceName, server.get_browse_name().Name)
     test.assertEqual(evgen.event.SourceNode, ua.NodeId(ua.ObjectIds.Server))
-    test.assertEqual(server.get_attribute(ua.AttributeIds.EventNotifier).Value, ua.Variant(1, ua.VariantType.Byte))
+    test.assertEqual(server.get_attribute(ua.AttributeIds.EventNotifier).Value, ua.Variant(5, ua.VariantType.Byte))
     refs = server.get_referenced_nodes(ua.ObjectIds.GeneratesEvent, ua.BrowseDirection.Forward, ua.NodeClass.ObjectType, False)
     test.assertGreaterEqual(len(refs), 1)
 
@@ -417,7 +417,7 @@ def check_eventgenerator_SourceServer(test, evgen):
 def check_event_generator_object(test, evgen, obj):
     test.assertEqual(evgen.event.SourceName, obj.get_browse_name().Name)
     test.assertEqual(evgen.event.SourceNode, obj.nodeid)
-    test.assertEqual(obj.get_attribute(ua.AttributeIds.EventNotifier).Value, ua.Variant(1, ua.VariantType.Byte))
+    test.assertEqual(obj.get_attribute(ua.AttributeIds.EventNotifier).Value, ua.Variant(5, ua.VariantType.Byte))
     refs = obj.get_referenced_nodes(ua.ObjectIds.GeneratesEvent, ua.BrowseDirection.Forward, ua.NodeClass.ObjectType, False)
     test.assertEqual(len(refs), 1)
     test.assertEqual(refs[0].nodeid, evgen.event.EventType)