[test] Add missing runtime availability check around diffing tests
[test] Add missing runtime availability check around diffing tests

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