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  1. or download this
    
use warnings;
...

# ------ load script with arg - expect ok
ok( require 'luckynumber.pl', 'script loaded ok');
  2. or download this
    
use strict;
...
main() if! caller();

1;
  3. or download this
    $ prove luckynumber.t
luckynumber....ok
All tests successful.
Files=1, Tests=1,  0 wallclock secs ( 0.06 cusr +  0.01 csys =  0.07 C
+PU)