test: add a recursion test
test: add a recursion test

we may probably want to add more later

abbshr/co,luxe-eng/valet-express.co,Jonekee/co,seegno-forks/co,f0rmat1k/co,VasylHryha/co,guangfu/co,cgvarela/co,pjeby/co3-devsuite,tj/co,hoozi/co,gyson/co,TakayukiSakai/co,gradecam/co