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#!./perl
use strict;
use warnings;
use Test::More tests => 22;
use List::Util qw(min);
my $v;
ok(defined &min, 'defined');
$v = min(9);
is($v, 9, 'single arg');
$v = min (1,2);
is($v, 1, '2-arg ordered');
$v = min(2,1);
is($v, 1, '2-arg reverse ordered');
my @a = map { rand() } 1 .. 20;
my @b = sort { $a <=> $b } @a;
$v = min(@a);
is($v, $b[0], '20-arg random order');
my $one = Foo->new(1);
my $two = Foo->new(2);
my $thr = Foo->new(3);
$v = min($one,$two,$thr);
is($v, 1, 'overload');
$v = min($thr,$two,$one);
is($v, 1, 'overload');
{ package Foo;
use overload
'""' => sub { ${$_[0]} },
'0+' => sub { ${$_[0]} },
'<' => sub { ${$_[0]} < ${$_[1]} },
fallback => 1;
sub new {
my $class = shift;
my $value = shift;
bless \$value, $class;
}
}
use Math::BigInt;
my $v1 = Math::BigInt->new(2) ** Math::BigInt->new(65);
my $v2 = $v1 - 1;
my $v3 = $v2 - 1;
$v = min($v1,$v2,$v1,$v3,$v1);
is($v, $v3, 'bigint');
$v = min($v1, 1, 2, 3);
is($v, 1, 'bigint and normal int');
$v = min(1, 2, $v1, 3);
is($v, 1, 'bigint and normal int');
{
# test that min/max and sum call GETMAGIC properly
# note, in my tests how this fails depends on exactly
# which List::Util subs are called and in what order.
my @list;
for my $size (10, 20, 10, 30) {
@list = ( 1 ) x $size;
my $sum= List::Util::sum( 0, $#list );
ok( $sum == $size-1, "sum(\$#list, 0) == $size-1");
my $min= List::Util::min( 15, $#list );
ok( $min <= 15, "min(15,$size)" );
my $max= List::Util::max( 0, $#list );
ok( $max == $size-1, "max(\$#list, 0) == $size-1");
}
}
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