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use strict;
use warnings;
use Test::More tests => 4;
=pod
Start with this:
<A>
/ \
<B> <C>
\ /
<D>
=cut
{
package Diamond_A;
use Class::C3;
sub hello { 'Diamond_A::hello' }
}
{
package Diamond_B;
BEGIN { our @ISA = ('Diamond_A'); }
use Class::C3;
}
{
package Diamond_C;
use Class::C3;
BEGIN { our @ISA = ('Diamond_A'); }
sub hello { 'Diamond_C::hello' }
}
{
package Diamond_D;
BEGIN { our @ISA = ('Diamond_B', 'Diamond_C'); }
use Class::C3;
}
Class::C3::initialize();
is_deeply(
[ Class::C3::calculateMRO('Diamond_D') ],
[ qw(Diamond_D Diamond_B Diamond_C Diamond_A) ],
'... got the right MRO for Diamond_D');
=pod
Then change it to this:
<E> <A>
\ / \
<B> <C>
\ /
<D>
=cut
{
package Diamond_E;
use Class::C3;
sub hello { 'Diamond_E::hello' }
}
{
no strict 'refs';
unshift @{"Diamond_B::ISA"} => 'Diamond_E';
}
is_deeply(
[ Class::C3::calculateMRO('Diamond_D') ],
[ qw(Diamond_D Diamond_B Diamond_E Diamond_C Diamond_A) ],
'... got the new MRO for Diamond_D');
# Doesn't work with core support, since reinit is not neccesary and the change
# takes effect immediately
SKIP: {
skip "This test does not work with a c3-patched perl interpreter", 1
if $Class::C3::C3_IN_CORE;
is(Diamond_D->hello, 'Diamond_C::hello', '... method still resolves with old MRO');
}
Class::C3::reinitialize();
is(Diamond_D->hello, 'Diamond_E::hello', '... method resolves with reinitialized MRO');
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