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#!/usr/bin/env perl
use strict;
use warnings;
use constant {
BAR => { bar => sub { 'Bar' } },
BAZ => { baz => sub { 'Baz' } },
NO_RECYCLED => "Can't get a recycled reference",
ROUNDS => 1000,
};
use Object::Extend qw(extend SINGLETON);
use Scalar::Util qw(refaddr);
use Test::More tests => 31;
sub foo { 'Foo' }
# try to trigger the reuse of a refaddr (i.e. C pointer)
# and return the first object that uses a recycled refaddr
sub recycle(;%) {
my %options = @_;
my ($original_methods, $recycled_methods) = @options{qw(original recycled)};
my ($recycled, %seen);
for (1 .. ROUNDS) {
my $object = bless {};
my $refaddr = refaddr($object);
if ($seen{$refaddr}) {
$recycled = $object;
if ($recycled_methods) {
extend $recycled => $recycled_methods;
}
last;
} else {
if ($original_methods) {
extend $object => $original_methods;
}
$seen{$refaddr} = 1;
undef $object;
}
}
return $recycled;
}
# sanity check the base case: neither the original nor
# the recycled are extended
SKIP: {
my $recycled = recycle();
skip NO_RECYCLED, 5 unless ($recycled);
isa_ok $recycled, __PACKAGE__;
can_ok $recycled, 'foo';
ok !$recycled->isa(SINGLETON);
ok !$recycled->can('bar');
ok !$recycled->can('baz');
};
# make sure the unextended recycled isn't contaminated by
# the extended original
SKIP: {
my $recycled = recycle(original => BAR);
skip NO_RECYCLED, 5 unless ($recycled);
isa_ok $recycled, __PACKAGE__;
can_ok $recycled, 'foo';
ok !$recycled->isa(SINGLETON);
ok !$recycled->can('bar');
ok !$recycled->can('baz');
};
# for completeness, make sure the recycled is sane if the
# original wasn't extended
SKIP: {
my $recycled = recycle(recycled => BAR);
skip NO_RECYCLED, 5 unless ($recycled);
isa_ok $recycled, __PACKAGE__;
isa_ok $recycled, SINGLETON;
can_ok $recycled, 'foo';
can_ok $recycled, 'bar';
ok !$recycled->can('baz');
};
# make sure there are no surprises if we extend the recycled
# in the same way that we've extended the original
SKIP: {
my $recycled = recycle(original => BAR, recycled => BAR);
skip NO_RECYCLED, 5 unless ($recycled);
isa_ok $recycled, __PACKAGE__;
isa_ok $recycled, SINGLETON;
can_ok $recycled, 'foo';
can_ok $recycled, 'bar';
ok !$recycled->can('baz');
};
# define bar in the original and redefine it to return a different value
# in recycled. make sure $recycled->bar returns the overridden value
SKIP: {
my $recycled = recycle(original => BAR, recycled => { bar => sub { 'Bar 2' } });
skip NO_RECYCLED, 6 unless ($recycled);
isa_ok $recycled, __PACKAGE__;
isa_ok $recycled, SINGLETON;
can_ok $recycled, 'foo';
can_ok $recycled, 'bar';
ok !$recycled->can('baz');
is $recycled->bar, 'Bar 2';
};
# extend the original with bar and the recycled with baz
# and make sure the recycled isn't contaminated by bar
SKIP: {
my $recycled = recycle(original => BAR, recycled => BAZ);
skip NO_RECYCLED, 5 unless ($recycled);
isa_ok $recycled, __PACKAGE__;
isa_ok $recycled, SINGLETON;
can_ok $recycled, 'foo';
can_ok $recycled, 'baz';
ok !$recycled->can('bar');
};
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