implement inlined access to the mop slot, to fix immutable anon classes

[gitmo/Class-MOP.git] / t / 048_anon_class_create_init.t

diff --git a/t/048_anon_class_create_init.t b/t/048_anon_class_create_init.t
index f95ade0..b362eae 100644 (file)
--- a/t/048_anon_class_create_init.t
+++ b/t/048_anon_class_create_init.t
@@ -1,9 +1,8 @@
-#!/usr/bin/perl
-
 use strict;
 use warnings;
 
-use Test::More tests => 2;
+use Test::More;
+use Test::Exception;
 
 use Class::MOP;
 
@@ -20,6 +19,132 @@ use Class::MOP;
 
 }
 
-my $anon = MyMeta->create_anon_class( foo => 'this' );
-isa_ok( $anon, 'MyMeta' );
+{
+    my $anon = MyMeta->create_anon_class( foo => 'this' );
+    isa_ok( $anon, 'MyMeta' );
+}
+
+my $instance;
+
+{
+    my $meta = Class::MOP::Class->create_anon_class;
+    $instance = $meta->new_object;
+}
+{
+    my $meta = Class::MOP::class_of($instance);
+    Scalar::Util::weaken($meta);
+    ok($meta, "anon class is kept alive by existing instances");
+
+    undef $instance;
+    ok(!$meta, "anon class is collected once instances go away");
+}
+
+{
+    my $meta = Class::MOP::Class->create_anon_class;
+    $meta->make_immutable;
+    $instance = $meta->name->new;
+}
+{
+    my $meta = Class::MOP::class_of($instance);
+    Scalar::Util::weaken($meta);
+    ok($meta, "anon class is kept alive by existing instances (immutable)");
+
+    undef $instance;
+    ok(!$meta, "anon class is collected once instances go away (immutable)");
+}
+
+{
+    $instance = Class::MOP::Class->create('Foo')->new_object;
+    my $meta = Class::MOP::Class->create_anon_class(superclasses => ['Foo']);
+    $meta->rebless_instance($instance);
+}
+{
+    my $meta = Class::MOP::class_of($instance);
+    Scalar::Util::weaken($meta);
+    ok($meta, "anon class is kept alive by existing instances");
+
+    undef $instance;
+    ok(!$meta, "anon class is collected once instances go away");
+}
+
+{
+    {
+        my $meta = Class::MOP::Class->create_anon_class;
+        {
+            my $submeta = Class::MOP::Class->create_anon_class(
+                superclasses => [$meta->name]
+            );
+            $instance = $submeta->new_object;
+        }
+        {
+            my $submeta = Class::MOP::class_of($instance);
+            Scalar::Util::weaken($submeta);
+            ok($submeta, "anon class is kept alive by existing instances");
+
+            $meta->rebless_instance_back($instance);
+            ok(!$submeta, "reblessing away loses the metaclass");
+        }
+    }
+
+    my $meta = Class::MOP::class_of($instance);
+    Scalar::Util::weaken($meta);
+    ok($meta, "anon class is kept alive by existing instances");
+}
+
+{
+    my $submeta = Class::MOP::Class->create_anon_class(
+        superclasses => [Class::MOP::Class->create_anon_class->name],
+    );
+    my @superclasses = $submeta->superclasses;
+    ok(Class::MOP::class_of($superclasses[0]),
+       "superclasses are kept alive by their subclasses");
+}
+
+{
+    my $meta_name;
+    {
+        my $meta = Class::MOP::Class->create_anon_class(
+            superclasses => ['Class::MOP::Class'],
+        );
+        $meta_name = $meta->name;
+        ok(Class::MOP::metaclass_is_weak($meta_name),
+           "default is for anon metaclasses to be weakened");
+    }
+    ok(!Class::MOP::class_of($meta_name),
+       "and weak metaclasses go away when all refs do");
+    {
+        my $meta = Class::MOP::Class->create_anon_class(
+            superclasses => ['Class::MOP::Class'],
+            weaken => 0,
+        );
+        $meta_name = $meta->name;
+        ok(!Class::MOP::metaclass_is_weak($meta_name),
+           "anon classes can be told not to weaken");
+    }
+    ok(Class::MOP::class_of($meta_name), "metaclass still exists");
+    {
+        my $bar_meta;
+        lives_ok {
+            $bar_meta = $meta_name->initialize('Bar');
+        } "we can use the name on its own";
+        isa_ok($bar_meta, $meta_name);
+    }
+}
+
+{
+    my $meta = Class::MOP::Class->create(
+        'Baz',
+        weaken => 1,
+    );
+    $instance = $meta->new_object;
+}
+{
+    my $meta = Class::MOP::class_of($instance);
+    Scalar::Util::weaken($meta);
+    ok($meta, "weak class is kept alive by existing instances");
+
+    undef $instance;
+    ok(!$meta, "weak class is collected once instances go away");
+}
 
+done_testing;