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#!./perl
use strict;
use warnings;
use Test::More tests => 8;
use List::Util qw(zip zip_longest zip_shortest);
is_deeply( [zip ()], [],
'zip empty returns empty');
is_deeply( [zip ['a'..'c']], [ ['a'], ['b'], ['c'] ],
'zip of one list returns a list of singleton lists' );
is_deeply( [zip ['one', 'two'], [1, 2]], [ [one => 1], [two => 2] ],
'zip of two lists returns a list of pair lists' );
# Unequal length arrays
is_deeply( [zip_longest ['x', 'y', 'z'], ['X', 'Y']], [ ['x', 'X'], ['y', 'Y'], ['z', undef] ],
'zip_longest extends short lists with undef' );
is_deeply( [zip_shortest ['x', 'y', 'z'], ['X', 'Y']], [ ['x', 'X'], ['y', 'Y'] ],
'zip_shortest stops after shortest list' );
# Non arrayref arguments throw exception
ok( !defined eval { zip 1, 2, 3 },
'non-reference argument throws exception' );
ok( !defined eval { zip +{ one => 1 } },
'reference to non array throws exception' );
# RT156183
{
my @inp = ( [1,2,3], [4,5,6] );
foreach my $pair ( zip @inp ) {
$pair->[0]++;
$pair->[1]++;
}
is_deeply( \@inp, [ [1,2,3], [4,5,6] ],
'original values unchanged by modification of zip() output' );
}
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