add test to check if there is a forum

courses/signals.py

@@ -284,13 +284,14 @@ def course_created_or_updated(sender, created, instance, **kwargs):
     else:
         forum = instance.forum
 
-    title=instance.name
-    forum.title_en = instance.name_en
-    forum.title_es = instance.name_es
-    forum.title_pt_br = instance.name_pt_br
-    forum.is_public=instance.is_public
-    forum.groups.set(instance.groups.all())
-    forum.save()
+    if instance.forum:
+        title=instance.name
+        forum.title_en = instance.name_en
+        forum.title_es = instance.name_es
+        forum.title_pt_br = instance.name_pt_br
+        forum.is_public=instance.is_public
+        forum.groups.set(instance.groups.all())
+        forum.save()
 
     # the course has a different logic for the release date, as it must
     # create de event only when is in the published state