c:\@Work\Perl\monks>perl -le
"use warnings;
 use strict;
 ;;
 use Test::More 'no_plan';
 use Test::NoWarnings;
 ;;
 use constant TEST_SET => (
   'undefined default values',
   [ { one => 1, three => 3, two => 2 },
     'one 1 two 2 three 3',
     ],
   [ { odd => undef, one => 1, three => 3, two => 2 },
     'one 1 two 2 three 3 odd',
     ],
   [ { odd => undef, one => 1, three => 3, two => 2 },
     'one 1 two 2 odd three 3',
     ],
   [ { odd => undef, one => 1, three => 3, two => 2 },
     'odd one 1 two 2 three 3',
     ],
   'defined default values',
   [ { one => 1, three => 3, two => 2 },
     'one 1 two 2 three 3', 'xxx',
     ],
   [ { odd => 'xxx', one => 1, three => 3, two => 2 },
     'one 1 two 2 three 3 odd', 'xxx',
     ],
   [ { odd => 'xxx', one => 1, three => 3, two => 2 },
     'one 1 two 2 odd three 3', 'xxx',
     ],
   [ { odd => 'xxx', one => 1, three => 3, two => 2 },
     'odd one 1 two 2 three 3', 'xxx',
     ],
   );
 ;;
 VECTOR:
 for my $ar_vector (TEST_SET) {
   if (not ref $ar_vector) {
     note $ar_vector;
     next VECTOR;
     }
   ;;
   my ($expected_hashref, $string, $default) = @$ar_vector;
   ;;
   is_deeply { odd_hash($string, $default) }, $expected_hashref;
   }
 ;;
 done_testing;
 ;;
 ;;
 sub odd_hash {
   my ($string, $default) = @_;
   ;;
   my %hash =
     map defined() ? $_ : $default,
     $string =~ m{ ([^\W\d]+) (?: \s* (\d+))? }xmsg
     ;
   return %hash;
   }
"
# undefined default values
ok 1
ok 2
ok 3
ok 4
# defined default values
ok 5
ok 6
ok 7
ok 8
1..8
ok 9 - no warnings
1..9