%!PS

% begin library code

/test {
    /test.count test.count 1 add def
    {
        /test.pass test.pass 1 add def
    } {
        ( ) print
        test.count (....) cvs print
        (-fail) print
    } ifelse
} bind def

/test.start {
    print (:) print
    /test.pass 0 def
    /test.count 0 def
} bind def

/test.end {
    ( ) print
    test.count 0 gt {
        (Passed ) print
        test.pass (...) cvs print
        (/) print
        test.count (...) cvs print
        ( \() print
        test.pass 100 mul test.count idiv (...) cvs print
        (%\)) print
        (\r\n) print
    } if
} bind def

% end library code

/summation {
    2 dict begin
    /ls exch def
    {
        ls length 1 eq {
            exit
        } if
        [
          1 1 ls length 1 sub {
              /s 0 def
              1 exch 1 exch {
                  ls exch get s add /s exch def
              } for
              s
          } for
        ] /ls exch def
    } loop
    ls 0 get
    end
} bind def

(summation) test.start
[1 2 3 4 5] summation 42 eq test
[1 3 5 7 9] summation 70 eq test
test.end