none of this use_ok nonsense

[gitmo/Class-MOP.git] / t / 200_Class_C3_compatibility.t

#!/usr/bin/perl

use strict;
use warnings;

use Test::More tests => 8;

=pod

This tests that Class::MOP works correctly 
with Class::C3 and it's somewhat insane 
approach to method resolution.

=cut

BEGIN {
    use_ok('Class::MOP');  
}

{
    package Diamond_A;
    use mro 'c3';
    use metaclass; # everyone will just inherit this now :)
    
    sub hello { 'Diamond_A::hello' }
}
{
    package Diamond_B;
    use mro 'c3';    
    use base 'Diamond_A';
}
{
    package Diamond_C;
    use mro 'c3';
    use base 'Diamond_A';     
    
    sub hello { 'Diamond_C::hello' }
}
{
    package Diamond_D;
    use mro 'c3';    
    use base ('Diamond_B', 'Diamond_C');
}

# we have to manually initialize 
# Class::C3 since we potentially 
# skip this test if it is not present
Class::C3::initialize();

is_deeply(
#    [ Class::C3::calculateMRO('Diamond_D') ],
    [ Diamond_D->meta->class_precedence_list ],
    [ qw(Diamond_D Diamond_B Diamond_C Diamond_A) ],
    '... got the right MRO for Diamond_D');

ok(Diamond_A->meta->has_method('hello'), '... A has a method hello');
ok(!Diamond_B->meta->has_method('hello'), '... B does not have a method hello');

ok(Diamond_C->meta->has_method('hello'), '... C has a method hello');
ok(!Diamond_D->meta->has_method('hello'), '... D does not have a method hello');

SKIP: {
    skip "C3 does not make aliases on 5.9.5+", 2 if $] > 5.009_004;
    ok(defined &Diamond_B::hello, '... B does have an alias to the method hello');
    ok(defined &Diamond_D::hello, '... D does have an alias to the method hello');
}