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# -*- perl -*-
use Test::More qw(no_plan);
use Set::Object qw(set refaddr);
use strict;
my $set = set();
{ package MyClass;
our $c;
sub new { $c++; my $pkg = shift;
my $self = bless {@_}, $pkg;
#print STDERR "# NEW - $self\n";
$self;
}
sub DESTROY {
my $self = shift;
#print STDERR "# FREE - $self\n";
$c-- }
}
use Devel::Peek;
{
my $item = MyClass->new;
$set->insert($item);
is($set->size, 1, "sanity check 1");
isa_ok($set, "Set::Object", "it's a Set::Object");
ok(!$set->isa("Set::Object::Weak"), "but not weak");
#diag(Dump($item));
$set->weaken;
#diag(Dump($item));
is($set->size, 1, "weaken not too eager");
isa_ok($set, "Set::Object::Weak", "it's now a Set::Object::Weak");
}
is($MyClass::c, 0, "weaken makes refcnt lower");
is($set->size, 0, "Set knows that the object expired");
diag($_) for $set->members;
$set->insert(MyClass->new);
is($set->size, 0, "weakened sets can't hold temporary objects");
my $structure = MyClass->new
(
bob => [ "Hi, I'm bob" ],
who => set(),
);
$structure->{who}->insert($structure->{bob});
$structure->{who}->weaken;
#diag("now cloning");
SKIP:{
unless (eval { require Storable; 1 }) {
skip "Storable not installed", 5;
}
my $clone = Storable::dclone $structure;
isnt(refaddr($structure->{bob}), refaddr($clone->{bob}), "sanity check 2");
isnt(${$structure->{who}}, ${$clone->{who}}, "sanity check 3");
is($clone->{who}->size, 1, "Set has size");
is(($clone->{who}->members)[0], $clone->{bob}, "Set contents preserved");
delete $clone->{bob};
is($clone->{who}->size, 0, "weaken preserved over dclone()");
}
# test strengthen, too
{
$set->clear();
$set->weaken();
my $ref = {};
{
my $ref2 = {};
$set->insert($ref, $ref2);
is($set->size, 2, "sanity check 4");
}
is($set->size, 1, "sanity check 5");
isa_ok($set, "Set::Object::Weak", "starts as a Set::Object::Weak");
$set->strengthen;
}
isa_ok($set, "Set::Object", "it's a Set::Object");
ok(!$set->isa("Set::Object::Weak"), "but not weak");
is($set->size, 1, "->strengthen()");
# test that weak sets can expire before their referants
{
my $referant = [ "hello, world" ];
{
my $set = set();
$set->weaken;
$set->insert($referant);
my $magic = Set::Object::get_magic($referant);
is_deeply($magic, [$$set], "Magic detected");
}
my $magic = Set::Object::get_magic($referant);
#diag("magic is $magic, length ".@$magic);
#Dump($magic);
#diag("got that? :)");
is_deeply($magic, undef, "Magic removed");
}
# test that dispel works with tied refs
{
my %object;
tie %object, 'Tie::Scalar::Null' => \%object;
$object{x} = "Hello";
is($object{x}, "Hello, world", "sanity check 6");
{
my $set = set(\%object);
$object{x} = "I'd like to buy you a coke";
my ($member) = $set->members;
is($member->{x},
"I'd like to buy you a coke, world", "sanity check 7");
$set->weaken;
$object{x} = "You're the one";
is($object{x}, "You're the one, world",
"weak_set magic doesn't interfere with tie magic");
is_deeply(Set::Object::get_magic(\%object), [$$set], "Magic detected");
}
is($object{x}, "You're the one, world",
"hash not ruined by _dispel_magic");
is_deeply(Set::Object::get_magic(\%object), undef, "Magic removed");
$object{y} = "Catch the light";
is($object{y}, "Catch the light, world",
"tie magic not interefered with by _dispel_magic");
}
# now do it the other way around...
{
my %object;
{
my $set = set(\%object);
$set->weaken;
tie %object, 'Tie::Scalar::Null' => \%object;
my ($member) = $set->members;
$member->{x} = "I'm almost over XS for one day";
is($member->{x},
"I'm almost over XS for one day, world", "sanity check 8");
is_deeply(Set::Object::get_magic(\%object), [$$set],
"Magic detected");
}
is_deeply(Set::Object::get_magic(\%object), undef, "Magic removed");
$object{y} = "Yep, that's enough";
#Dump(\%object);
is($object{y}, "Yep, that's enough, world",
"tie magic not interefered with by _dispel_magic [reverse]");
}
require Set::Object::Weak;
no strict 'subs';
Set::Object::Weak->import(weak_set);
my $s = Set::Object::Weak->new([]);
is($s->size, 0, "Set::Object::Weak->new()");
$s = weak_set([]);
is($s->size, 0, "weak_set()");
# ok, may as well put it there too
my $ws = Set::Object::weak_set(["ø"]);
is($ws->size, 0, "Set::Object::weak_set");
# test example in the SYNOPSIS
$ws = Set::Object::Weak->new( 0, "", {}, [], (bless {}, "Object") );
is($ws->size, 2, "made a weak set");
$ws = Set::Object::Weak::set("one");
is($ws->size, 1, "Set::Object::Weak::set() inserts its arguments");
{package Tie::Scalar::Null;
sub TIEHASH {
my ($class) = @_;
return bless {}, $class;
}
sub FETCH {
$DB::single = 1;
$_[0]->{$_[1]};
}
sub STORE {
$DB::single = 1;
$_[0]->{$_[1]} = "$_[2], world";
}
sub FIRSTKEY {
each %{$_[0]};
}
sub NEXTKEY {
each %{$_[0]};
}
}
$set = Set::Object::weak_set(["ø"]) + Set::Object::weak_set(["þ"]);
is($set->size(), 2, "computations on sets don't care that they're weak");
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