Add assertions that array fetches return arrays
Add assertions that array fetches return arrays

Fixes #820

funtusov/data,topaxi/data,tstirrat/ember-data,splattne/data,InboxHealth/data,eriktrom/data,fpauser/data,hibariya/data,zoeesilcock/data,wecc/data,fsmanuel/data,yaymukund/data,martndemus/data,rtablada/data,webPapaya/data,PrecisionNutrition/data,sammcgrail/data,webPapaya/data,pdud/data,Eric-Guo/data,Addepar/ember-data,ryanpatrickcook/data,pdud/data,knownasilya/data,zoeesilcock/data,mphasize/data,minasmart/data,dustinfarris/data,fpauser/data,andrejunges/data,PrecisionNutrition/data,simaob/data,EmberSherpa/data,tonywok/data,intuitivepixel/data,Turbo87/ember-data,rtablada/data,slindberg/data,kappiah/data,BookingSync/data,gniquil/data,wecc/data,jmurphyau/data,yaymukund/data,heathharrelson/data,kimroen/data,HeroicEric/data,davidpett/data,flowjzh/data,greyhwndz/data,acburdine/data,vikram7/data,whatthewhat/data,Turbo87/ember-data,webPapaya/data,minasmart/data,martndemus/data,fsmanuel/data,jmurphyau/data,EmberSherpa/data,tonywok/data,nickiaconis/data,k-fish/data,in4mates/ember-data,lostinpatterns/data,heathharrelson/data,Kuzirashi/data,kimroen/data,faizaanshamsi/data,topaxi/data,tonywok/data,seanpdoyle/data,swarmbox/data,ryanpatrickcook/data,usecanvas/data,XrXr/data,martndemus/data,InboxHealth/data,usecanvas/data,HeroicEric/data,andrejunges/data,sebweaver/data,mphasize/data,intuitivepixel/data,stefanpenner/data,Turbo87/ember-data,fsmanuel/data,Kuzirashi/data,stefanpenner/data,BBLN/data,bf4/data,hibariya/data,intuitivepixel/data,lostinpatterns/data,davidpett/data,knownasilya/data,thaume/data,greyhwndz/data,eriktrom/data,bcardarella/data,fpauser/data,workmanw/data,simaob/data,seanpdoyle/data,courajs/data,danmcclain/data,FinSync/ember-data,in4mates/ember-data,zoeesilcock/data,duggiefresh/data,HeroicEric/data,FinSync/ember-data,seanpdoyle/data,BBLN/data,nickiaconis/data,tarzan/data,gabriel-letarte/data,danmcclain/data,andrejunges/data,heathharrelson/data,tstirrat/ember-data,wecc/data,hibariya/data,danmcclain/data,jmurphyau/data,slindberg/data,workmanw/data,Kuzirashi/data,sebastianseilund/data,Robdel12/data,courajs/data,tarzan/data,gniquil/data,vikram7/data,rtablada/data,HeroicEric/data,whatthewhat/data,splattne/data,kappiah/data,k-fish/data,dustinfarris/data,offirgolan/data,bcardarella/data,acburdine/data,arenoir/data,courajs/data,nickiaconis/data,usecanvas/data,Eric-Guo/data,gniquil/data,slindberg/data,webPapaya/data,mphasize/data,sebastianseilund/data,sebastianseilund/data,FinSync/ember-data,BookingSync/data,gabriel-letarte/data,nickiaconis/data,sammcgrail/data,k-fish/data,davidpett/data,Addepar/ember-data,thaume/data,swarmbox/data,dustinfarris/data,knownasilya/data,jgwhite/data,workmanw/data,yaymukund/data,acburdine/data,tstirrat/ember-data,XrXr/data,hibariya/data,H1D/data,stefanpenner/data,kimroen/data,bf4/data,offirgolan/data,funtusov/data,fsmanuel/data,H1D/data,thaume/data,martndemus/data,gkaran/data,bcardarella/data,whatthewhat/data,Kuzirashi/data,gabriel-letarte/data,tarzan/data,ryanpatrickcook/data,PrecisionNutrition/data,pdud/data,pdud/data,gkaran/data,funtusov/data,sebweaver/data,BBLN/data,gkaran/data,kappiah/data,jmurphyau/data,Eric-Guo/data,gkaran/data,sammcgrail/data,ryanpatrickcook/data,workmanw/data,minasmart/data,arenoir/data,minasmart/data,faizaanshamsi/data,BookingSync/data,greyhwndz/data,simaob/data,mphasize/data,arenoir/data,funtusov/data,EmberSherpa/data,sebweaver/data,topaxi/data,tstirrat/ember-data,stefanpenner/data,bf4/data,BookingSync/data,trisrael/em-data,Eric-Guo/data,Robdel12/data,fpauser/data,duggiefresh/data,bf4/data,sebweaver/data,flowjzh/data,trisrael/em-data,flowjzh/data,XrXr/data,tarzan/data,trisrael/em-data,Robdel12/data,duggiefresh/data,duggiefresh/data,arenoir/data,H1D/data,lostinpatterns/data,intuitivepixel/data,offirgolan/data,jgwhite/data,acburdine/data,danmcclain/data,thaume/data,jgwhite/data,PrecisionNutrition/data,eriktrom/data,swarmbox/data,seanpdoyle/data,wecc/data,flowjzh/data,k-fish/data,offirgolan/data,eriktrom/data,InboxHealth/data,yaymukund/data,gniquil/data,courajs/data,greyhwndz/data,H1D/data,in4mates/ember-data,BBLN/data,jgwhite/data,sebastianseilund/data,topaxi/data,vikram7/data,bcardarella/data,dustinfarris/data,splattne/data,swarmbox/data,lostinpatterns/data,InboxHealth/data,Robdel12/data,andrejunges/data,vikram7/data,sammcgrail/data,simaob/data,splattne/data,FinSync/ember-data,davidpett/data,EmberSherpa/data,heathharrelson/data,faizaanshamsi/data,rtablada/data,gabriel-letarte/data,zoeesilcock/data,kappiah/data,whatthewhat/data,usecanvas/data,faizaanshamsi/data,XrXr/data,Addepar/ember-data,tonywok/data,Turbo87/ember-data