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use Test::More;
use strict; use warnings FATAL => 'all';
use List::Objects::WithUtils 'hash';
my $first = hash(a => 1, b => 2, c => 3, d => 4);
my $second = +{a => 1, b => 2, x => 1, y => 2};
my $diff = $first->diff($second);
is_deeply
[ $diff->sort->all ],
[ qw/c d x y/ ],
'two-hash diff ok'
or diag explain $diff;
my $third = hash(a => 1, b => 2, c => 3, e => 1);
$diff = $third->diff($first, $second);
is_deeply
[ $diff->sort->all ],
[ qw/c d e x y/ ],
'three-hash diff ok'
or diag explain $diff;
done_testing
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