storage: Minor test improvements (#26929)
storage: Minor test improvements (#26929)

Expect console errors.
alanorozco/amphtml,danielrozenberg/amphtml,lannka/amphtml,danielrozenberg/amphtml,voyagegroup/amphtml,jpettitt/amphtml,Gregable/amphtml,rsimha-amp/amphtml,danielrozenberg/amphtml,adup-tech/amphtml,mhc-gh/amphtml,voyagegroup/amphtml,jridgewell/amphtml,adup-tech/amphtml,Gregable/amphtml,media-net/amphtml,cory-work/amphtml,jpettitt/amphtml,smartadserver/amphtml,ampproject/amphtml,honeybadgerdontcare/amphtml,yandex-pcode/amphtml,jridgewell/amphtml,taboola/amphtml,jridgewell/amphtml,adup-tech/amphtml,nexxtv/amphtml,sharethrough/amphtml,Gregable/amphtml,zhouyx/amphtml,danielrozenberg/amphtml,voyagegroup/amphtml,zhouyx/amphtml,prateekbh/amphtml,ampproject/amphtml,taboola/amphtml,ampproject/amphtml,mhc-gh/amphtml,alanorozco/amphtml,jmadler/amphtml,smartadserver/amphtml,cory-work/amphtml,smartadserver/amphtml,alanorozco/amphtml,yandex-pcode/amphtml,Gregable/amphtml,jpettitt/amphtml,ampproject/amphtml,media-net/amphtml,rsimha-amp/amphtml,mhc-gh/amphtml,adup-tech/amphtml,nexxtv/amphtml,cory-work/amphtml,lannka/amphtml,sharethrough/amphtml,danielrozenberg/amphtml,nexxtv/amphtml,sharethrough/amphtml,taboola/amphtml,voyagegroup/amphtml,jmadler/amphtml,honeybadgerdontcare/amphtml,prateekbh/amphtml,voyagegroup/amphtml,media-net/amphtml,lannka/amphtml,jmadler/amphtml,ampproject/amphtml,Gregable/amphtml,smartadserver/amphtml,mhc-gh/amphtml,zhouyx/amphtml,cory-work/amphtml,jpettitt/amphtml,smartadserver/amphtml,media-net/amphtml,jpettitt/amphtml,nexxtv/amphtml,honeybadgerdontcare/amphtml,mhc-gh/amphtml,media-net/amphtml,lannka/amphtml,taboola/amphtml,cory-work/amphtml,prateekbh/amphtml,smartadserver/amphtml,ampproject/amphtml,danielrozenberg/amphtml,media-net/amphtml,cory-work/amphtml,rsimha-amp/amphtml,sharethrough/amphtml,zhouyx/amphtml,danielrozenberg/amphtml,taboola/amphtml,voyagegroup/amphtml,adup-tech/amphtml,nexxtv/amphtml,mhc-gh/amphtml,rsimha-amp/amphtml,zhouyx/amphtml,alanorozco/amphtml,honeybadgerdontcare/amphtml,rsimha-amp/amphtml,honeybadgerdontcare/amphtml,mhc-gh/amphtml,ampproject/amphtml,yandex-pcode/amphtml,prateekbh/amphtml,alanorozco/amphtml,jmadler/amphtml,Gregable/amphtml,prateekbh/amphtml,sharethrough/amphtml,yandex-pcode/amphtml,cory-work/amphtml,jpettitt/amphtml,jridgewell/amphtml,lannka/amphtml,jmadler/amphtml,media-net/amphtml,taboola/amphtml,yandex-pcode/amphtml,rsimha-amp/amphtml,prateekbh/amphtml,nexxtv/amphtml,lannka/amphtml,jpettitt/amphtml,alanorozco/amphtml,jridgewell/amphtml,yandex-pcode/amphtml,nexxtv/amphtml,rsimha-amp/amphtml,yandex-pcode/amphtml,honeybadgerdontcare/amphtml,adup-tech/amphtml,alanorozco/amphtml,ampproject/amphtml,Gregable/amphtml,sharethrough/amphtml,prateekbh/amphtml,jmadler/amphtml,jridgewell/amphtml,voyagegroup/amphtml,lannka/amphtml,mhc-gh/amphtml,taboola/amphtml,Gregable/amphtml,alanorozco/amphtml,media-net/amphtml,zhouyx/amphtml,honeybadgerdontcare/amphtml,zhouyx/amphtml,jridgewell/amphtml,danielrozenberg/amphtml,jpettitt/amphtml