%!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

/keys { % dict -> array of dict keys
    [ exch
      {
          pop
      } forall
    ]
} 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

/nestedarray {
    0 dict begin
    /a exch def
    /arr 0 def
    0 1 a length 1 sub {
        /j exch def
        /trail 0 dict def
        {
            /j a j get def
            trail j known {
                exit
            } if
            trail j true put
        } loop
        /arr arr trail keys length max def
    } for
    arr
    end
} bind def

(nestedarray) test.start
[5 4 0 3 1 6 2] nestedarray 4 eq test
[0 1 2] nestedarray 1 eq test
test.end