specs fixing

app/models/ability.rb

@@ -36,15 +36,25 @@ class Ability
       ]
     end
 
-    # List of possible abilities
-    # for non-authenticated user
+    # List of possible abilities for anonymous user
     def anonymous_abilities(user, subject)
+      case true
+      when subject.is_a?(PersonalSnippet)
+        anonymous_personal_snippet_abilities(subject)
+      when subject.is_a?(Project) || subject.respond_to?(:project)
+        anonymous_project_abilities(subject)
+      when subject.is_a?(Group) || subject.respond_to?(:group)
+        anonymous_group_abilities(subject)
+      else
+        []
+      end
+    end
+
+    def anonymous_project_abilities(subject)
       project = if subject.is_a?(Project)
                   subject
-                elsif subject.respond_to?(:project)
-                  subject.project
                 else
-                  nil
+                  subject.project
                 end
 
       if project && project.public?
@@ -64,12 +74,15 @@ class Ability
 
         rules - project_disabled_features_rules(project)
       else
-        group = if subject.kind_of?(Group)
+        []
+      end
+    end
+
+    def anonymous_group_abilities(subject)
+      group = if subject.is_a?(Group)
                 subject
-                elsif subject.respond_to?(:group)
-                  subject.group
               else
-                  nil
+                subject.group
               end
 
       if group && group.public_profile?
@@ -78,7 +91,6 @@ class Ability
         []
       end
     end
-    end
 
     def anonymous_personal_snippet_abilities(snippet)
       if snippet.public?