Add test for rack handler
Add test for rack handler

ngpestelos/puma,looker/puma,looker/puma,kyledrake/puma,prathamesh-sonpatki/puma,eileencodes/puma,kyledrake/puma,kyledrake/puma,looker/puma,puma/puma,prathamesh-sonpatki/puma,respire/puma,puma/puma,eileencodes/puma,respire/puma,prathamesh-sonpatki/puma,unleashed/puma,kyledrake/puma,respire/puma,ngpestelos/puma,unleashed/puma,puma/puma,prathamesh-sonpatki/puma,eileencodes/puma,ngpestelos/puma,looker/puma,unleashed/puma,eileencodes/puma,respire/puma,puma/puma,unleashed/puma,ngpestelos/puma