1 files changed, 95 insertions, 0 deletions
diff --git a/t/cmop/rebless_instance.t b/t/cmop/rebless_instance.t
new file mode 100644
index 0000000..4cbefd6
--- /dev/null
+++ b/t/cmop/rebless_instance.t
@@ -0,0 +1,95 @@
+use strict;
+use warnings;
+
+use Test::More;
+use Test::Fatal;
+use Scalar::Util 'blessed';
+
+{
+        package Parent;
+        use metaclass;
+
+        sub new    { bless {} => shift }
+        sub whoami { "parent"          }
+        sub parent { "parent"          }
+
+        package Child;
+        use metaclass;
+        use parent -norequire => 'Parent';
+
+        sub whoami { "child" }
+        sub child  { "child" }
+
+        package LeftField;
+        use metaclass;
+
+        sub new    { bless {} => shift }
+        sub whoami { "leftfield"       }
+        sub myhax  { "areleet"         }
+}
+
+# basic tests
+my $foo = Parent->new;
+is(blessed($foo), 'Parent', 'Parent->new gives a Parent');
+is($foo->whoami, "parent", 'Parent->whoami gives parent');
+is($foo->parent, "parent", 'Parent->parent gives parent');
+isnt( exception { $foo->child }, undef, "Parent->child method doesn't exist" );
+
+Child->meta->rebless_instance($foo);
+is(blessed($foo), 'Child', 'rebless_instance really reblessed the instance');
+is($foo->whoami, "child", 'reblessed->whoami gives child');
+is($foo->parent, "parent", 'reblessed->parent gives parent');
+is($foo->child, "child", 'reblessed->child gives child');
+
+like( exception { LeftField->meta->rebless_instance($foo) }, qr/You may rebless only into a subclass of \(Child\), of which \(LeftField\) isn't\./ );
+
+like( exception { Class::MOP::Class->initialize("NonExistent")->rebless_instance($foo) }, qr/You may rebless only into a subclass of \(Child\), of which \(NonExistent\) isn't\./ );
+
+Parent->meta->rebless_instance_back($foo);
+is(blessed($foo), 'Parent', 'Parent->new gives a Parent');
+is($foo->whoami, "parent", 'Parent->whoami gives parent');
+is($foo->parent, "parent", 'Parent->parent gives parent');
+isnt( exception { $foo->child }, undef, "Parent->child method doesn't exist" );
+
+like( exception { LeftField->meta->rebless_instance_back($foo) }, qr/You may rebless only into a superclass of \(Parent\), of which \(LeftField\) isn't\./ );
+
+like( exception { Class::MOP::Class->initialize("NonExistent")->rebless_instance_back($foo) }, qr/You may rebless only into a superclass of \(Parent\), of which \(NonExistent\) isn't\./ );
+
+# make sure our ->meta is still sane
+my $bar = Parent->new;
+is(blessed($bar), 'Parent', "sanity check");
+is(blessed($bar->meta), 'Class::MOP::Class', "meta gives a Class::MOP::Class");
+is($bar->meta->name, 'Parent', "this Class::MOP::Class instance is for Parent");
+
+ok($bar->meta->has_method('new'), 'metaclass has "new" method');
+ok($bar->meta->has_method('whoami'), 'metaclass has "whoami" method');
+ok($bar->meta->has_method('parent'), 'metaclass has "parent" method');
+
+is(blessed($bar->meta->new_object), 'Parent', 'new_object gives a Parent');
+
+Child->meta->rebless_instance($bar);
+is(blessed($bar), 'Child', "rebless really reblessed");
+is(blessed($bar->meta), 'Class::MOP::Class', "meta gives a Class::MOP::Class");
+is($bar->meta->name, 'Child', "this Class::MOP::Class instance is for Child");
+
+ok($bar->meta->find_method_by_name('new'), 'metaclass has "new" method');
+ok($bar->meta->find_method_by_name('parent'), 'metaclass has "parent" method');
+ok(!$bar->meta->has_method('new'), 'no "new" method in this class');
+ok(!$bar->meta->has_method('parent'), 'no "parent" method in this class');
+ok($bar->meta->has_method('whoami'), 'metaclass has "whoami" method');
+ok($bar->meta->has_method('child'), 'metaclass has "child" method');
+
+is(blessed($bar->meta->new_object), 'Child', 'new_object gives a Child');
+
+Parent->meta->rebless_instance_back($bar);
+is(blessed($bar), 'Parent', "sanity check");
+is(blessed($bar->meta), 'Class::MOP::Class', "meta gives a Class::MOP::Class");
+is($bar->meta->name, 'Parent', "this Class::MOP::Class instance is for Parent");
+
+ok($bar->meta->has_method('new'), 'metaclass has "new" method');
+ok($bar->meta->has_method('whoami'), 'metaclass has "whoami" method');
+ok($bar->meta->has_method('parent'), 'metaclass has "parent" method');
+
+is(blessed($bar->meta->new_object), 'Parent', 'new_object gives a Parent');
+
+done_testing;