Add tests for finish callback
Add tests for finish callback

vasylbo/aiohttp,panda73111/aiohttp,jojurajan/aiohttp,saghul/aiohttp,singulared/aiohttp,jettify/aiohttp,KeepSafe/aiohttp,pfreixes/aiohttp,z2v/aiohttp,singulared/aiohttp,arthurdarcet/aiohttp,danielnelson/aiohttp,pathcl/aiohttp,panda73111/aiohttp,jashandeep-sohi/aiohttp,jashandeep-sohi/aiohttp,esaezgil/aiohttp,vaskalas/aiohttp,rutsky/aiohttp,moden-py/aiohttp,elastic-coders/aiohttp,AlexLisovoy/aiohttp,noplay/aiohttp,Insoleet/aiohttp,elastic-coders/aiohttp,alexsdutton/aiohttp,andyaguiar/aiohttp,playpauseandstop/aiohttp,iksteen/aiohttp,KeepSafe/aiohttp,vedun/aiohttp,alex-eri/aiohttp-1,noplay/aiohttp,arthurdarcet/aiohttp,moden-py/aiohttp,Eyepea/aiohttp,esaezgil/aiohttp,pfreixes/aiohttp,hellysmile/aiohttp,Srogozins/aiohttp,juliatem/aiohttp,panda73111/aiohttp,mind1master/aiohttp,alunduil/aiohttp,jettify/aiohttp,AraHaanOrg/aiohttp,moden-py/aiohttp,saghul/aiohttp,KeepSafe/aiohttp,avanov/aiohttp,hellysmile/aiohttp,rutsky/aiohttp,sterwill/aiohttp,flying-sheep/aiohttp,singulared/aiohttp,mind1master/aiohttp,alexsdutton/aiohttp,mind1master/aiohttp,iksteen/aiohttp,decentfox/aiohttp,alex-eri/aiohttp-1,z2v/aiohttp,vaskalas/aiohttp,alex-eri/aiohttp-1,jettify/aiohttp,decentfox/aiohttp,AraHaanOrg/aiohttp,rutsky/aiohttp,jojurajan/aiohttp,AlexLisovoy/aiohttp,vaskalas/aiohttp,elastic-coders/aiohttp,noodle-learns-programming/aiohttp,arthurdarcet/aiohttp,morgan-del/aiohttp,juliatem/aiohttp,jashandeep-sohi/aiohttp,esaezgil/aiohttp,z2v/aiohttp,decentfox/aiohttp