add a contains() override test
add a contains() override test

Akrog/sqlalchemy,graingert/sqlalchemy,davidfraser/sqlalchemy,inspirehep/sqlalchemy,robin900/sqlalchemy,robin900/sqlalchemy,Cito/sqlalchemy,bootandy/sqlalchemy,davidjb/sqlalchemy,Cito/sqlalchemy,elelianghh/sqlalchemy,WinterNis/sqlalchemy,sandan/sqlalchemy,bootandy/sqlalchemy,brianv0/sqlalchemy,halfcrazy/sqlalchemy,olemis/sqlalchemy,WinterNis/sqlalchemy,bdupharm/sqlalchemy,monetate/sqlalchemy,halfcrazy/sqlalchemy,276361270/sqlalchemy,elelianghh/sqlalchemy,Cito/sqlalchemy,wfxiang08/sqlalchemy,hsum/sqlalchemy,davidjb/sqlalchemy,ThiefMaster/sqlalchemy,wfxiang08/sqlalchemy,ThiefMaster/sqlalchemy,itkovian/sqlalchemy,sandan/sqlalchemy,j5int/sqlalchemy,davidfraser/sqlalchemy,inspirehep/sqlalchemy,276361270/sqlalchemy,dstufft/sqlalchemy,alex/sqlalchemy,bdupharm/sqlalchemy,sqlalchemy/sqlalchemy,pdufour/sqlalchemy,epa/sqlalchemy,monetate/sqlalchemy,wujuguang/sqlalchemy,graingert/sqlalchemy,EvaSDK/sqlalchemy,brianv0/sqlalchemy,alex/sqlalchemy,itkovian/sqlalchemy,zzzeek/sqlalchemy,alex/sqlalchemy,EvaSDK/sqlalchemy,epa/sqlalchemy,dstufft/sqlalchemy,wujuguang/sqlalchemy,pdufour/sqlalchemy,j5int/sqlalchemy,Akrog/sqlalchemy,olemis/sqlalchemy,hsum/sqlalchemy