Mod to listeners to support unit testing your app
Mod to listeners to support unit testing your app

Signed-off-by: Chris Duell <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@chrisduell.com>

anteriovieira/revisionable,VentureCraft/revisionable,anggras/revisionable,spira/revisionable,gratif/revisionable,SpaceGazebo/RevisionableTraitL5,jfhernandeze/revisionable,vladutcornel/revisionable