Added tests to cover autoclosure discriminators.
Added tests to cover autoclosure discriminators.

jckarter/swift,CodaFi/swift,parkera/swift,atrick/swift,lorentey/swift,shajrawi/swift,tkremenek/swift,gribozavr/swift,apple/swift,airspeedswift/swift,hooman/swift,gregomni/swift,aschwaighofer/swift,nathawes/swift,nathawes/swift,atrick/swift,shahmishal/swift,xwu/swift,CodaFi/swift,shahmishal/swift,apple/swift,gribozavr/swift,benlangmuir/swift,jmgc/swift,xedin/swift,lorentey/swift,gribozavr/swift,sschiau/swift,tkremenek/swift,xedin/swift,tkremenek/swift,sschiau/swift,harlanhaskins/swift,hooman/swift,parkera/swift,CodaFi/swift,benlangmuir/swift,parkera/swift,jmgc/swift,xedin/swift,CodaFi/swift,jckarter/swift,jckarter/swift,sschiau/swift,devincoughlin/swift,xwu/swift,xedin/swift,karwa/swift,apple/swift,benlangmuir/swift,roambotics/swift,benlangmuir/swift,shahmishal/swift,sschiau/swift,tkremenek/swift,roambotics/swift,atrick/swift,jckarter/swift,devincoughlin/swift,lorentey/swift,airspeedswift/swift,parkera/swift,JGiola/swift,stephentyrone/swift,harlanhaskins/swift,aschwaighofer/swift,lorentey/swift,allevato/swift,gregomni/swift,karwa/swift,benlangmuir/swift,xedin/swift,jmgc/swift,xwu/swift,harlanhaskins/swift,lorentey/swift,allevato/swift,harlanhaskins/swift,gribozavr/swift,nathawes/swift,allevato/swift,airspeedswift/swift,karwa/swift,aschwaighofer/swift,lorentey/swift,karwa/swift,roambotics/swift,tkremenek/swift,aschwaighofer/swift,shahmishal/swift,jmgc/swift,CodaFi/swift,hooman/swift,apple/swift,parkera/swift,glessard/swift,stephentyrone/swift,roambotics/swift,shahmishal/swift,shajrawi/swift,JGiola/swift,harlanhaskins/swift,xwu/swift,gregomni/swift,jmgc/swift,ahoppen/swift,glessard/swift,glessard/swift,jckarter/swift,allevato/swift,sschiau/swift,jmgc/swift,shahmishal/swift,jckarter/swift,devincoughlin/swift,airspeedswift/swift,ahoppen/swift,parkera/swift,sschiau/swift,hooman/swift,aschwaighofer/swift,JGiola/swift,ahoppen/swift,shajrawi/swift,stephentyrone/swift,xedin/swift,shajrawi/swift,xedin/swift,xwu/swift,JGiola/swift,atrick/swift,rudkx/swift,hooman/swift,rudkx/swift,JGiola/swift,gribozavr/swift,xwu/swift,tkremenek/swift,karwa/swift,allevato/swift,rudkx/swift,gregomni/swift,stephentyrone/swift,hooman/swift,gregomni/swift,rudkx/swift,harlanhaskins/swift,xwu/swift,aschwaighofer/swift,parkera/swift,karwa/swift,xedin/swift,devincoughlin/swift,shajrawi/swift,glessard/swift,nathawes/swift,gribozavr/swift,shajrawi/swift,roambotics/swift,CodaFi/swift,rudkx/swift,aschwaighofer/swift,shahmishal/swift,nathawes/swift,tkremenek/swift,airspeedswift/swift,jckarter/swift,ahoppen/swift,devincoughlin/swift,glessard/swift,benlangmuir/swift,atrick/swift,hooman/swift,allevato/swift,airspeedswift/swift,stephentyrone/swift,gribozavr/swift,CodaFi/swift,nathawes/swift,stephentyrone/swift,ahoppen/swift,gribozavr/swift,atrick/swift,parkera/swift,jmgc/swift,devincoughlin/swift,apple/swift,apple/swift,glessard/swift,shajrawi/swift,sschiau/swift,devincoughlin/swift,roambotics/swift,ahoppen/swift,devincoughlin/swift,JGiola/swift,lorentey/swift,nathawes/swift,karwa/swift,sschiau/swift,allevato/swift,karwa/swift,stephentyrone/swift,airspeedswift/swift,rudkx/swift,harlanhaskins/swift,gregomni/swift,shajrawi/swift,shahmishal/swift,lorentey/swift