Testing ""
Testing "/usr/bin"
Testing "/usr"
Testing "/"
Testing "///"
Testing "/usr//"
Testing "//usr//bin"
Testing "usr"
Testing "usr/bin"
Testing suffix "/usr/bin" "n"
Testing suffix "/usr/bin" "bin"
Testing suffix "/" "/"
Testing suffix "/usr/bin/gcc" "cc"
Testing suffix "/usr/bin/gcc" "xx"