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#!/usr/bin/perl
use strict;
use warnings;
use Test::More tests => 6;
BEGIN {
use_ok('Class::MOP');
use_ok('Class::MOP::Class');
}
=pod
A
/ \
B C
\ /
D
=cut
{
package My::A;
use metaclass;
package My::B;
our @ISA = ('My::A');
package My::C;
our @ISA = ('My::A');
package My::D;
our @ISA = ('My::B', 'My::C');
}
is_deeply(
[ My::D->meta->class_precedence_list ],
[ 'My::D', 'My::B', 'My::A', 'My::C', 'My::A' ],
'... My::D->meta->class_precedence_list == (D B A C A)');
=pod
A <-+
| |
B |
| |
C --+
=cut
{
package My::2::A;
use metaclass;
our @ISA = ('My::2::C');
package My::2::B;
our @ISA = ('My::2::A');
package My::2::C;
our @ISA = ('My::2::B');
}
eval { My::2::B->meta->class_precedence_list };
ok($@, '... recursive inheritance breaks correctly :)');
=pod
+--------+
| A |
| / \ |
+->B C-+
\ /
D
=cut
{
package My::3::A;
use metaclass;
package My::3::B;
our @ISA = ('My::3::A');
package My::3::C;
our @ISA = ('My::3::A', 'My::3::B');
package My::3::D;
our @ISA = ('My::3::B', 'My::3::C');
}
is_deeply(
[ My::3::D->meta->class_precedence_list ],
[ 'My::3::D', 'My::3::B', 'My::3::A', 'My::3::C', 'My::3::A', 'My::3::B', 'My::3::A' ],
'... My::3::D->meta->class_precedence_list == (D B A C A B A)');
=pod
Test all the class_precedence_lists
using Perl's own dispatcher to check
against.
=cut
my @CLASS_PRECEDENCE_LIST;
{
package Foo;
use metaclass;
sub CPL { push @CLASS_PRECEDENCE_LIST => 'Foo' }
package Bar;
our @ISA = ('Foo');
sub CPL {
push @CLASS_PRECEDENCE_LIST => 'Bar';
$_[0]->SUPER::CPL();
}
package Baz;
use metaclass;
our @ISA = ('Bar');
sub CPL {
push @CLASS_PRECEDENCE_LIST => 'Baz';
$_[0]->SUPER::CPL();
}
package Foo::Bar;
our @ISA = ('Baz');
sub CPL {
push @CLASS_PRECEDENCE_LIST => 'Foo::Bar';
$_[0]->SUPER::CPL();
}
package Foo::Bar::Baz;
our @ISA = ('Foo::Bar');
sub CPL {
push @CLASS_PRECEDENCE_LIST => 'Foo::Bar::Baz';
$_[0]->SUPER::CPL();
}
}
Foo::Bar::Baz->CPL();
is_deeply(
[ Foo::Bar::Baz->meta->class_precedence_list ],
[ @CLASS_PRECEDENCE_LIST ],
'... Foo::Bar::Baz->meta->class_precedence_list == @CLASS_PRECEDENCE_LIST');
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