Added tests for simple operations
Added tests for simple operations

aleksandr-bakanov/astropy,larrybradley/astropy,AustereCuriosity/astropy,lpsinger/astropy,aleksandr-bakanov/astropy,astropy/astropy,DougBurke/astropy,pllim/astropy,StuartLittlefair/astropy,joergdietrich/astropy,lpsinger/astropy,funbaker/astropy,funbaker/astropy,pllim/astropy,bsipocz/astropy,DougBurke/astropy,AustereCuriosity/astropy,pllim/astropy,aleksandr-bakanov/astropy,DougBurke/astropy,dhomeier/astropy,larrybradley/astropy,bsipocz/astropy,mhvk/astropy,tbabej/astropy,MSeifert04/astropy,aleksandr-bakanov/astropy,lpsinger/astropy,kelle/astropy,lpsinger/astropy,dhomeier/astropy,bsipocz/astropy,tbabej/astropy,joergdietrich/astropy,AustereCuriosity/astropy,kelle/astropy,MSeifert04/astropy,stargaser/astropy,saimn/astropy,StuartLittlefair/astropy,pllim/astropy,joergdietrich/astropy,AustereCuriosity/astropy,StuartLittlefair/astropy,pllim/astropy,stargaser/astropy,astropy/astropy,tbabej/astropy,MSeifert04/astropy,saimn/astropy,kelle/astropy,stargaser/astropy,AustereCuriosity/astropy,funbaker/astropy,mhvk/astropy,larrybradley/astropy,astropy/astropy,bsipocz/astropy,tbabej/astropy,DougBurke/astropy,StuartLittlefair/astropy,larrybradley/astropy,dhomeier/astropy,dhomeier/astropy,saimn/astropy,larrybradley/astropy,kelle/astropy,mhvk/astropy,joergdietrich/astropy,funbaker/astropy,mhvk/astropy,tbabej/astropy,saimn/astropy,dhomeier/astropy,MSeifert04/astropy,astropy/astropy,lpsinger/astropy,mhvk/astropy,saimn/astropy,kelle/astropy,stargaser/astropy,astropy/astropy,joergdietrich/astropy,StuartLittlefair/astropy