Add more tests for FilteringService
Add more tests for FilteringService

Signed-off-by: Dmitriy Zaporozhets <be23d75b156792e5acab51b196a2deb155d35d6a@gmail.com>

stoplightio/gitlabhq,tim-hoff/gitlabhq,ttasanen/gitlabhq,rebecamendez/gitlabhq,michaKFromParis/sparkslab,bozaro/gitlabhq,fscherwi/gitlabhq,NARKOZ/gitlabhq,martinma4/gitlabhq,duduribeiro/gitlabhq,jrjang/gitlab-ce,fscherwi/gitlabhq,pjknkda/gitlabhq,whluwit/gitlabhq,whluwit/gitlabhq,bbodenmiller/gitlabhq,rebecamendez/gitlabhq,gorgee/gitlabhq,duduribeiro/gitlabhq,TheWatcher/gitlabhq,htve/GitlabForChinese,nmav/gitlabhq,iiet/iiet-git,gorgee/gitlabhq,Datacom/gitlabhq,luzhongyang/gitlabhq,Tyrael/gitlabhq,windymid/test2,yama07/gitlabhq,NARKOZ/gitlabhq,hacsoc/gitlabhq,it33/gitlabhq,kitech/gitlabhq,LytayTOUCH/gitlabhq,shinexiao/gitlabhq,duduribeiro/gitlabhq,joalmeid/gitlabhq,phinfonet/mobbr-gitlabhq,ayufan/gitlabhq,yulchitaj/TEST3,icedwater/gitlabhq,dreampet/gitlab,LUMC/gitlabhq,manfer/gitlabhq,jirutka/gitlabhq,Keystion/gitlabhq,dukex/gitlabhq,ordiychen/gitlabhq,Tyrael/gitlabhq,zBMNForks/gitlabhq,8thcolor/testing-public-gitlabhq,darkrasid/gitlabhq,dukex/gitlabhq,tempbottle/gitlabhq,sideci-sample/sideci-sample-gitlabhq,bladealslayer/gitlabhq,rumpelsepp/gitlabhq,folpindo/gitlabhq,youprofit/gitlabhq,Telekom-PD/gitlabhq,sekcheong/gitlabhq,mavimo/gitlabhq,jirutka/gitlabhq,johnmyqin/gitlabhq,liyakun/gitlabhq,vjustov/gitlabhq,fscherwi/gitlabhq,aaronsnyder/gitlabhq,jairzh/gitlabhq-sfdc,WSDC-NITWarangal/gitlabhq,kotaro-dev/gitlab-6-9,Kambda/Mobbr,tk23/gitlabhq,salipro4ever/gitlabhq,zrbsprite/gitlabhq,martijnvermaat/gitlabhq,yulchitaj/TEST3,Devin001/gitlabhq,michaKFromParis/gitlabhqold,bozaro/gitlabhq,vjustov/gitlabhq,t-zuehlsdorff/gitlabhq,ikappas/gitlabhq,initiummedia/gitlabhq,michaKFromParis/gitlabhq,SkyWei/gitlabhq,gopeter/gitlabhq,rhels/gitlabhq,stellamiranda/mobbr-gitlabhq,kemenaran/gitlabhq,theodi/gitlabhq,DanielZhangQingLong/gitlabhq,nguyen-tien-mulodo/gitlabhq,pjknkda/gitlabhq,michaKFromParis/gitlabhq,akumetsuv/gitlab,michaKFromParis/gitlabhq,ZeoAlliance/gitlabhq,initiummedia/gitlabhq,openwide-java/gitlabhq,aaronsnyder/gitlabhq,it33/gitlabhq,ngpestelos/gitlabhq,kemenaran/gitlabhq,jvanbaarsen/gitlabhq,vjustov/gitlabhq,shinexiao/gitlabhq,sue445/gitlabhq,mr-dxdy/gitlabhq,dwrensha/gitlabhq,tim-hoff/gitlabhq,since2014/gitlabhq,mrb/gitlabhq,yonglehou/gitlabhq,jaepyoung/gitlabhq,jairzh/gitlabhq-sfdc,liyakun/gitlabhq,axilleas/gitlabhq,mavimo/gitlabhq,Telekom-PD/gitlabhq,ttasanen/gitlabhq,atomaka/gitlabhq,icedwater/gitlabhq,pjknkda/gitlabhq,darkrasid/gitlabhq,bbodenmiller/gitlabhq,jirutka/gitlabhq,flashbuckets/gitlabhq,copystudy/gitlabhq,Soullivaneuh/gitlabhq,jaepyoung/gitlabhq,xuvw/gitlabhq,larryli/gitlabhq,TheWatcher/gitlabhq,MauriceMohlek/gitlabhq,atomaka/gitlabhq,screenpages/gitlabhq,icedwater/gitlabhq,johnmyqin/gitlabhq,bigsurge/gitlabhq,ferdinandrosario/gitlabhq,cui-liqiang/gitlab-ce,gorgee/gitlabhq,dvrylc/gitlabhq,mavimo/gitlabhq,hacsoc/gitlabhq,jrjang/gitlabhq,t-zuehlsdorff/gitlabhq,rhels/gitlabhq,shinexiao/gitlabhq,yatish27/gitlabhq,childbamboo/gitlabhq,fearenales/gitlabhq,Razer6/gitlabhq,screenpages/gitlabhq,fendoudeqingchunhh/gitlabhq,axilleas/gitlabhq,hzy001/gitlabhq,delkyd/gitlabhq,screenpages/gitlabhq,NKMR6194/gitlabhq,theonlydoo/gitlabhq,chadyred/gitlabhq,Telekom-PD/gitlabhq,MauriceMohlek/gitlabhq,DanielZhangQingLong/gitlabhq,yuyue2013/ss,jrjang/gitlabhq,pkgr/gitlabhq,ibiart/gitlabhq,yuyue2013/ss,salipro4ever/gitlabhq,yfaizal/gitlabhq,hacsoc/gitlabhq,mathstuf/gitlabhq,Soullivaneuh/gitlabhq,aaronsnyder/gitlabhq,LUMC/gitlabhq,nmav/gitlabhq,szechyjs/gitlabhq,kitech/gitlabhq,rumpelsepp/gitlabhq,mente/gitlabhq,ZeoAlliance/gitlabhq,lvfeng1130/gitlabhq,NuLL3rr0r/gitlabhq,sakishum/gitlabhq,johnmyqin/gitlabhq,jrjang/gitlabhq,sideci-sample/sideci-sample-gitlabhq,eliasp/gitlabhq,SVArago/gitlabhq,pulkit21/gitlabhq,yonglehou/gitlabhq,fendoudeqingchunhh/gitlabhq,dplarson/gitlabhq,per-garden/gitlabhq,cncodog/gitlab,htve/GitlabForChinese,yatish27/gitlabhq,folpindo/gitlabhq,julianengel/gitlabhq,cncodog/gitlab,lvfeng1130/gitlabhq,hzy001/gitlabhq,sakishum/gitlabhq,OtkurBiz/gitlabhq,NARKOZ/gitlabhq,ksoichiro/gitlabhq,dplarson/gitlabhq,ksoichiro/gitlabhq,mente/gitlabhq,LUMC/gitlabhq,childbamboo/gitlabhq,nmav/gitlabhq,k4zzk/gitlabhq,theonlydoo/gitlabhq,adaiguoguo/gitlab_globalserarch,openwide-java/gitlabhq,Exeia/gitlabhq,htve/GitlabForChinese,allysonbarros/gitlabhq,jvanbaarsen/gitlabhq,tempbottle/gitlabhq,mmkassem/gitlabhq,fgbreel/gitlabhq,ferdinandrosario/gitlabhq,jrjang/gitlab-ce,folpindo/gitlabhq,123Haynes/gitlabhq,michaKFromParis/sparkslab,ordiychen/gitlabhq,OtkurBiz/gitlabhq,phinfonet/mobbr-gitlabhq,allysonbarros/gitlabhq,t-zuehlsdorff/gitlabhq,pulkit21/gitlabhq,sonalkr132/gitlabhq,Burick/gitlabhq,fantasywind/gitlabhq,fgbreel/gitlabhq,sonalkr132/gitlabhq,yfaizal/gitlabhq,nguyen-tien-mulodo/gitlabhq,gopeter/gitlabhq,cui-liqiang/gitlab-ce,revaret/gitlabhq,bigsurge/gitlabhq,julianengel/gitlabhq,yama07/gitlabhq,fendoudeqingchunhh/gitlabhq,ksoichiro/gitlabhq,axilleas/gitlabhq,michaKFromParis/gitlabhqold,ngpestelos/gitlabhq,rfeese/gitlab-ce,hq804116393/gitlabhq,ferdinandrosario/gitlabhq,SkyWei/gitlabhq,fantasywind/gitlabhq,allysonbarros/gitlabhq,since2014/gitlabhq,cui-liqiang/gitlab-ce,zBMNForks/gitlabhq,theonlydoo/gitlabhq,theodi/gitlabhq,gopeter/gitlabhq,eliasp/gitlabhq,daiyu/gitlab-zh,xuvw/gitlabhq,stanhu/gitlabhq,martinma4/gitlabhq,folpindo/gitlabhq,louahola/gitlabhq,mr-dxdy/gitlabhq,stanhu/gitlabhq,adaiguoguo/gitlab_globalserarch,icedwater/gitlabhq,rfeese/gitlab-ce,jvanbaarsen/gitlabhq,Burick/gitlabhq,joalmeid/gitlabhq,yuyue2013/ss,OlegGirko/gitlab-ce,mmkassem/gitlabhq,zrbsprite/gitlabhq,stoplightio/gitlabhq,WSDC-NITWarangal/gitlabhq,sakishum/gitlabhq,DanielZhangQingLong/gitlabhq,Exeia/gitlabhq,hzy001/gitlabhq,szechyjs/gitlabhq,openwide-java/gitlabhq,yulchitaj/TEST3,chadyred/gitlabhq,mrb/gitlabhq,gorgee/gitlabhq,H3Chief/gitlabhq,LytayTOUCH/gitlabhq,rebecamendez/gitlabhq,fpgentil/gitlabhq,adaiguoguo/gitlab_globalserarch,lvfeng1130/gitlabhq,H3Chief/gitlabhq,stellamiranda/mobbr-gitlabhq,initiummedia/gitlabhq,ikappas/gitlabhq,fpgentil/gitlabhq,flashbuckets/gitlabhq,Razer6/gitlabhq,dvrylc/gitlabhq,phinfonet/mobbr-gitlabhq,stanhu/gitlabhq,louahola/gitlabhq,jrjang/gitlab-ce,jirutka/gitlabhq,pulkit21/gitlabhq,yuyue2013/ss,bozaro/gitlabhq,sekcheong/gitlabhq,koreamic/gitlabhq,jrjang/gitlabhq,MauriceMohlek/gitlabhq,per-garden/gitlabhq,Tyrael/gitlabhq,SVArago/gitlabhq,michaKFromParis/gitlabhqold,kemenaran/gitlabhq,tk23/gitlabhq,H3Chief/gitlabhq,rhels/gitlabhq,chenrui2014/gitlabhq,yulchitaj/TEST3,Keystion/gitlabhq,cncodog/gitlab,ngpestelos/gitlabhq,bigsurge/gitlabhq,pkallberg/tjenare,martijnvermaat/gitlabhq,ayufan/gitlabhq,fantasywind/gitlabhq,NKMR6194/gitlabhq,ibiart/gitlabhq,stoplightio/gitlabhq,8thcolor/testing-public-gitlabhq,dukex/gitlabhq,tk23/gitlabhq,yonglehou/gitlabhq,michaKFromParis/gitlabhq,dwrensha/gitlabhq,koreamic/gitlabhq,szechyjs/gitlabhq,theodi/gitlabhq,yama07/gitlabhq,windymid/test2,michaKFromParis/gitlabhqold,liyakun/gitlabhq,8thcolor/testing-public-gitlabhq,chenrui2014/gitlabhq,Datacom/gitlabhq,Kambda/mobbr-gitlabhq,revaret/gitlabhq,Exeia/gitlabhq,duduribeiro/gitlabhq,mmkassem/gitlabhq,delkyd/gitlabhq,NuLL3rr0r/gitlabhq,sonalkr132/gitlabhq,adaiguoguo/gitlab_globalserarch,kitech/gitlabhq,bigsurge/gitlabhq,NKMR6194/gitlabhq,iiet/iiet-git,liyakun/gitlabhq,nmav/gitlabhq,williamherry/gitlabhq,cinderblock/gitlabhq,WSDC-NITWarangal/gitlabhq,rfeese/gitlab-ce,delkyd/gitlabhq,NuLL3rr0r/gitlabhq,louahola/gitlabhq,williamherry/gitlabhq,hzy001/gitlabhq,pkgr/gitlabhq,ngpestelos/gitlabhq,pkallberg/tjenare,hq804116393/gitlabhq,jaepyoung/gitlabhq,Kambda/Mobbr,larryli/gitlabhq,mrb/gitlabhq,sekcheong/gitlabhq,ttasanen/gitlabhq,fgbreel/gitlabhq,mavimo/gitlabhq,fearenales/gitlabhq,dwrensha/gitlabhq,kemenaran/gitlabhq,sue445/gitlabhq,allysonbarros/gitlabhq,Devin001/gitlabhq,zrbsprite/gitlabhq,yatish27/gitlabhq,stellamiranda/mobbr-gitlabhq,yfaizal/gitlabhq,initiummedia/gitlabhq,sue445/gitlabhq,delkyd/gitlabhq,chenrui2014/gitlabhq,Soullivaneuh/gitlabhq,allistera/gitlabhq,jairzh/gitlabhq-sfdc,darkrasid/gitlabhq,tempbottle/gitlabhq,stanhu/gitlabhq,sakishum/gitlabhq,allistera/gitlabhq,daiyu/gitlab-zh,sue445/gitlabhq,mente/gitlabhq,wangcan2014/gitlabhq,bozaro/gitlabhq,williamherry/gitlabhq,copystudy/gitlabhq,zBMNForks/gitlabhq,wangcan2014/gitlabhq,manfer/gitlabhq,ibiart/gitlabhq,youprofit/gitlabhq,copystudy/gitlabhq,luzhongyang/gitlabhq,since2014/gitlabhq,eliasp/gitlabhq,dvrylc/gitlabhq,salipro4ever/gitlabhq,flashbuckets/gitlabhq,mrb/gitlabhq,darkrasid/gitlabhq,revaret/gitlabhq,akumetsuv/gitlab,fendoudeqingchunhh/gitlabhq,koreamic/gitlabhq,bbodenmiller/gitlabhq,louahola/gitlabhq,axilleas/gitlabhq,johnmyqin/gitlabhq,chenrui2014/gitlabhq,per-garden/gitlabhq,ordiychen/gitlabhq,NARKOZ/gitlabhq,yama07/gitlabhq,joalmeid/gitlabhq,sideci-sample/sideci-sample-gitlabhq,larryli/gitlabhq,eliasp/gitlabhq,bladealslayer/gitlabhq,pjknkda/gitlabhq,Kambda/mobbr-gitlabhq,fpgentil/gitlabhq,iiet/iiet-git,Devin001/gitlabhq,OlegGirko/gitlab-ce,fearenales/gitlabhq,luzhongyang/gitlabhq,luzhongyang/gitlabhq,fearenales/gitlabhq,bladealslayer/gitlabhq,fantasywind/gitlabhq,openwide-java/gitlabhq,flashbuckets/gitlabhq,julianengel/gitlabhq,yonglehou/gitlabhq,WSDC-NITWarangal/gitlabhq,cinderblock/gitlabhq,kotaro-dev/gitlab-6-9,kotaro-dev/gitlab-6-9,rumpelsepp/gitlabhq,k4zzk/gitlabhq,ZeoAlliance/gitlabhq,theonlydoo/gitlabhq,dukex/gitlabhq,chadyred/gitlabhq,youprofit/gitlabhq,wangcan2014/gitlabhq,jrjang/gitlab-ce,aaronsnyder/gitlabhq,k4zzk/gitlabhq,yatish27/gitlabhq,DanielZhangQingLong/gitlabhq,Kambda/Mobbr,zBMNForks/gitlabhq,MauriceMohlek/gitlabhq,rfeese/gitlab-ce,jvanbaarsen/gitlabhq,fpgentil/gitlabhq,sonalkr132/gitlabhq,whluwit/gitlabhq,allistera/gitlabhq,pkgr/gitlabhq,vjustov/gitlabhq,rebecamendez/gitlabhq,atomaka/gitlabhq,ferdinandrosario/gitlabhq,dwrensha/gitlabhq,Kambda/mobbr-gitlabhq,Datacom/gitlabhq,mathstuf/gitlabhq,ayufan/gitlabhq,childbamboo/gitlabhq,manfer/gitlabhq,dvrylc/gitlabhq,Exeia/gitlabhq,ikappas/gitlabhq,ikappas/gitlabhq,TheWatcher/gitlabhq,iiet/iiet-git,hacsoc/gitlabhq,revaret/gitlabhq,copystudy/gitlabhq,OtkurBiz/gitlabhq,jairzh/gitlabhq-sfdc,martijnvermaat/gitlabhq,OlegGirko/gitlab-ce,dplarson/gitlabhq,julianengel/gitlabhq,OtkurBiz/gitlabhq,H3Chief/gitlabhq,SkyWei/gitlabhq,mr-dxdy/gitlabhq,it33/gitlabhq,dreampet/gitlab,manfer/gitlabhq,childbamboo/gitlabhq,OlegGirko/gitlab-ce,ttasanen/gitlabhq,mmkassem/gitlabhq,Telekom-PD/gitlabhq,k4zzk/gitlabhq,gopeter/gitlabhq,daiyu/gitlab-zh,joalmeid/gitlabhq,Devin001/gitlabhq,it33/gitlabhq,screenpages/gitlabhq,hq804116393/gitlabhq,koreamic/gitlabhq,martinma4/gitlabhq,shinexiao/gitlabhq,Razer6/gitlabhq,lvfeng1130/gitlabhq,fscherwi/gitlabhq,jaepyoung/gitlabhq,Keystion/gitlabhq,tk23/gitlabhq,rhels/gitlabhq,tim-hoff/gitlabhq,Tyrael/gitlabhq,dreampet/gitlab,allistera/gitlabhq,stoplightio/gitlabhq,nguyen-tien-mulodo/gitlabhq,per-garden/gitlabhq,SVArago/gitlabhq,ayufan/gitlabhq,martijnvermaat/gitlabhq,cncodog/gitlab,bbodenmiller/gitlabhq,cinderblock/gitlabhq,michaKFromParis/sparkslab,fgbreel/gitlabhq,TheWatcher/gitlabhq,mathstuf/gitlabhq,Burick/gitlabhq,whluwit/gitlabhq,akumetsuv/gitlab,pulkit21/gitlabhq,cui-liqiang/gitlab-ce,Burick/gitlabhq,SVArago/gitlabhq,mente/gitlabhq,michaKFromParis/sparkslab,LytayTOUCH/gitlabhq,youprofit/gitlabhq,theodi/gitlabhq,ordiychen/gitlabhq,Razer6/gitlabhq,since2014/gitlabhq,NKMR6194/gitlabhq,tim-hoff/gitlabhq,nguyen-tien-mulodo/gitlabhq,chadyred/gitlabhq,sekcheong/gitlabhq,dreampet/gitlab,Soullivaneuh/gitlabhq,hq804116393/gitlabhq,daiyu/gitlab-zh,t-zuehlsdorff/gitlabhq,windymid/test2,mr-dxdy/gitlabhq,martinma4/gitlabhq,ksoichiro/gitlabhq,wangcan2014/gitlabhq,Datacom/gitlabhq,mathstuf/gitlabhq,123Haynes/gitlabhq,salipro4ever/gitlabhq,xuvw/gitlabhq,williamherry/gitlabhq,LUMC/gitlabhq,pkallberg/tjenare,kitech/gitlabhq,dplarson/gitlabhq,SkyWei/gitlabhq,zrbsprite/gitlabhq,tempbottle/gitlabhq,123Haynes/gitlabhq,cinderblock/gitlabhq,yfaizal/gitlabhq,LytayTOUCH/gitlabhq,Keystion/gitlabhq,htve/GitlabForChinese,szechyjs/gitlabhq,larryli/gitlabhq,rumpelsepp/gitlabhq