xref: /openbsd-src/gnu/usr.bin/perl/t/mro/next_method_utf8.t (revision 898184e3e61f9129feb5978fad5a8c6865f00b92)

#!/usr/bin/perl

use strict;
use warnings;
use utf8;
use open qw( :utf8 :std );

require q(./test.pl); plan(tests => 5);

=pod

This tests the classic diamond inheritance pattern.

   <A>
  /   \
<B>   <C>
  \   /
   <D>

=cut

{
    package Diӑmond_A;
    use mro 'c3';
    sub 헬ฬ { 'Diӑmond_A::헬ฬ' }
    sub fಓ { 'Diӑmond_A::fಓ' }
}
{
    package Diӑmond_B;
    use base 'Diӑmond_A';
    use mro 'c3';
    sub fಓ { 'Diӑmond_B::fಓ => ' . (shift)->next::method() }
}
{
    package Diӑmond_C;
    use mro 'c3';
    use base 'Diӑmond_A';

    sub 헬ฬ { 'Diӑmond_C::헬ฬ => ' . (shift)->next::method() }
    sub fಓ { 'Diӑmond_C::fಓ => ' . (shift)->next::method() }
}
{
    package Diӑmond_D;
    use base ('Diӑmond_B', 'Diӑmond_C');
    use mro 'c3';

    sub fಓ { 'Diӑmond_D::fಓ => ' . (shift)->next::method() }
}

ok(eq_array(
    mro::get_linear_isa('Diӑmond_D'),
    [ qw(Diӑmond_D Diӑmond_B Diӑmond_C Diӑmond_A) ]
), '... got the right MRO for Diӑmond_D');

is(Diӑmond_D->헬ฬ, 'Diӑmond_C::헬ฬ => Diӑmond_A::헬ฬ', '... method resolved itself as expected');

is(Diӑmond_D->can('헬ฬ')->('Diӑmond_D'),
   'Diӑmond_C::헬ฬ => Diӑmond_A::헬ฬ',
   '... can(method) resolved itself as expected');

is(UNIVERSAL::can("Diӑmond_D", '헬ฬ')->('Diӑmond_D'),
   'Diӑmond_C::헬ฬ => Diӑmond_A::헬ฬ',
   '... can(method) resolved itself as expected');

is(Diӑmond_D->fಓ,
    'Diӑmond_D::fಓ => Diӑmond_B::fಓ => Diӑmond_C::fಓ => Diӑmond_A::fಓ',
    '... method fಓ resolved itself as expected');