assertToString('https://go.microsoft.com/fwlink/?LinkId=518008&foö&ké¥=üü','https://go.microsoft.com/fwlink/?LinkId=518008&fo%C3%B6&k%C3%A9%C2%A5=%C3%BC%C3%BC');// encode umlaute and friends
// normalize things like
assertToString('file:///c:/test/me','file:///c%3A/test/me');// drive letter treatment