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#!./perl
use strict;
use warnings;
require q(./test.pl); plan(tests => 2);
=pod
This tests a strange bug found by Matt S. Trout
while building DBIx::Class. Thanks Matt!!!!
<A>
/ \
<C> <B>
\ /
<D>
=cut
{
package Diamond_A;
use mro 'c3';
sub foo { 'Diamond_A::foo' }
}
{
package Diamond_B;
use base 'Diamond_A';
use mro 'c3';
sub foo { 'Diamond_B::foo => ' . (shift)->SUPER::foo }
}
{
package Diamond_C;
use mro 'c3';
use base 'Diamond_A';
}
{
package Diamond_D;
use base ('Diamond_C', 'Diamond_B');
use mro 'c3';
sub foo { 'Diamond_D::foo => ' . (shift)->SUPER::foo }
}
ok(eq_array(
mro::get_linear_isa('Diamond_D'),
[ qw(Diamond_D Diamond_C Diamond_B Diamond_A) ]
), '... got the right MRO for Diamond_D');
is(Diamond_D->foo,
'Diamond_D::foo => Diamond_B::foo => Diamond_A::foo',
'... got the right next::method dispatch path');
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