Add test unit for $add meta fields $priority and $value
Add test unit for $add meta fields $priority and $value

yoda-yoda/angularfire,nbr1ninrsan2/angularfire,itxd/angularfire,fbentz/angularfire,FirebaseExtended/angularfire,nbr1ninrsan2/angularfire,itxd/angularfire,fbentz/angularfire,jamestalmage/angularfire,itxd/angularfire,cesarmarinhorj/angularfire,douglascorrea/angularfire,yoda-yoda/angularfire,denisKaranja/angularfire,nbr1ninrsan2/angularfire,fbentz/angularfire,jamestalmage/angularfire,FirebaseExtended/angularfire,denisKaranja/angularfire,yoda-yoda/angularfire,jamestalmage/angularfire,FirebaseExtended/angularfire,bpietravalle/angularfire,bpietravalle/angularfire,douglascorrea/angularfire,bpietravalle/angularfire,denisKaranja/angularfire,cesarmarinhorj/angularfire,douglascorrea/angularfire,cesarmarinhorj/angularfire