Remove stubs on DiscourseEvent in tests.

spec/support/discourse_event_helper.rb

@@ -0,0 +1,18 @@
+module DiscourseEvent::TestHelper
+  def trigger(event_name, *params)
+    super(event_name, *params)
+
+    if @events_trigger
+      @events_trigger << { event_name: event_name, params: params }
+    end
+  end
+
+  def track_events
+    @events_trigger = events_trigger = []
+    yield
+    @events_trigger = nil
+    events_trigger
+  end
+end
+
+DiscourseEvent.singleton_class.prepend DiscourseEvent::TestHelper