%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) )))
0:regression test for ERR_EXIT 
>0
>0
>0

 echo $(( min(42, 43, 44) ))
 echo $(( min(44, 42, 43) ))
 echo $(( min(43, 44, 42) ))
 #
 echo $(( max(42, 43, 44) ))
 echo $(( max(44, 42, 43) ))
 echo $(( max(43, 44, 42) ))
0:min() and max() with three arguments
>42
>42
>42
>44
>44
>44

 echo $(( min() ))
1:error test for min()
?(eval):1: wrong number of arguments: min()

 echo $(( max() ))
1:error test for max()
?(eval):1: wrong number of arguments: max()


%clean