%prep
  autoload -Uz zmathfunc && zmathfunc

%test

  echo $(( min(42, 43) )) $(( max(42, 43) )) $(( sum(42, 43) ))
  echo $(( min(42) )) $(( max(42) )) $(( sum(42) ))
  echo $(( sum() ))
0:basic functionality test
>42 43 85
>42 42 42
>0


  (set -e; echo $(( min(0,   42) )))
  (set -e; echo $(( max(0,  -42) )))
  (set -e; echo $(( sum(42, -42) )))
-f:regression test for ERR_EXIT 
>0
>0
>0

%clean