%!PS

% begin included library code
% see https://codeberg.org/Firedrake/postscript-libraries/
/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

/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


% end included library code

/elementdigitsum {
    0 dict begin
    0 exch
    {
        /n exch 10 idiv def
        /m 10 def
        {
            n 0 le {
                exit
            } if
            /digit n 10 mod def
            /n n 10 idiv def
            digit m 1 sub mul add
            /m m 10 mul def
        } loop
    } forall
    end
} bind def

(elementdigitsum) test.start
[1 2 3 45] elementdigitsum 36 eq test
[1 12 3] elementdigitsum 9 eq test
[1 2 3 4] elementdigitsum 0 eq test
[236 416 336 350] elementdigitsum 1296 eq test
test.end