#!perl

use Config;

use Test::More;
use Safe;
plan(tests => 4);

my $c = Safe->new;
$c->permit( <qw(require caller));

my $r = $c->reval(q!
    sub UNIVERSAL::isa { "pwned" }
    (bless \@(),"Foo")->isa("Foo");
!);

is( $r, "pwned", "isa overriden in compartment" );
is( (bless\@(),"Foo")->isa("Foo"), 1, "... but not outside" );

sub Foo::foo {}

$r = $c->reval(q!
    sub UNIVERSAL::can { "pwned" }
    (bless \@(),"Foo")->can("foo");
!);

is( $r, "pwned", "can overriden in compartment" );
is( (bless\@(),"Foo")->can("foo"), \&Foo::foo, "... but not outside" );