Add tests for fuel.downloaders.base
Add tests for fuel.downloaders.base

mjwillson/fuel,markusnagel/fuel,rodrigob/fuel,mjwillson/fuel,rizar/fuel,udibr/fuel,dwf/fuel,capybaralet/fuel,chrishokamp/fuel,glewis17/fuel,dwf/fuel,dhruvparamhans/fuel,dribnet/fuel,EderSantana/fuel,dmitriy-serdyuk/fuel,laurent-dinh/fuel,lamblin/fuel,lamblin/fuel,bouthilx/fuel,chrishokamp/fuel,codeaudit/fuel,jbornschein/fuel,orhanf/fuel,aalmah/fuel,orhanf/fuel,EderSantana/fuel,harmdevries89/fuel,codeaudit/fuel,dribnet/fuel,vdumoulin/fuel,ejls/fuel,bouthilx/fuel,glewis17/fuel,janchorowski/fuel,laurent-dinh/fuel,harmdevries89/fuel,capybaralet/fuel,dmitriy-serdyuk/fuel,dhruvparamhans/fuel,markusnagel/fuel,janchorowski/fuel,jbornschein/fuel,rizar/fuel,mila-udem/fuel,aalmah/fuel,hantek/fuel,udibr/fuel,ejls/fuel,vdumoulin/fuel,mila-udem/fuel,rodrigob/fuel,hantek/fuel