Add a test for inserting with an existing key
Add a test for inserting with an existing key

armirusco/djangae,SiPiggles/djangae,jscissr/djangae,stucox/djangae,leekchan/djangae,SiPiggles/djangae,grzes/djangae,asendecka/djangae,leekchan/djangae,asendecka/djangae,grzes/djangae,stucox/djangae,wangjun/djangae,jscissr/djangae,potatolondon/djangae,kirberich/djangae,pablorecio/djangae,pablorecio/djangae,martinogden/djangae,chargrizzle/djangae,trik/djangae,kirberich/djangae,leekchan/djangae,potatolondon/djangae,b-cannon/my_djae,martinogden/djangae,nealedj/djangae,asendecka/djangae,chargrizzle/djangae,trik/djangae,wangjun/djangae,martinogden/djangae,stucox/djangae,armirusco/djangae,wangjun/djangae,SiPiggles/djangae,grzes/djangae,nealedj/djangae,armirusco/djangae,jscissr/djangae,chargrizzle/djangae,trik/djangae,pablorecio/djangae,kirberich/djangae,nealedj/djangae