Add calculateUri test with empty uri
Add calculateUri test with empty uri

PVince81/sabre-dav,staabm/sabre-dav,PVince81/sabre-dav,fruux/sabre-dav,PVince81/sabre-dav,fruux/sabre-dav,fruux/sabre-dav,staabm/sabre-dav,staabm/sabre-dav