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use strict;
use warnings;
use Test::More tests => 5;
=pod
This tests the classic diamond inheritence pattern.
<A>
/ \
<B> <C>
\ /
<D>
=cut
{
package Diamond_A;
use Class::C3;
sub hello { 'Diamond_A::hello' }
sub foo { 'Diamond_A::foo' }
}
{
package Diamond_B;
BEGIN { our @ISA = ('Diamond_A'); }
use Class::C3;
sub foo { 'Diamond_B::foo => ' . (shift)->next::method() }
}
{
package Diamond_C;
use Class::C3;
BEGIN { our @ISA = ('Diamond_A'); }
sub hello { 'Diamond_C::hello => ' . (shift)->next::method() }
sub foo { 'Diamond_C::foo => ' . (shift)->next::method() }
}
{
package Diamond_D;
BEGIN { our @ISA = ('Diamond_B', 'Diamond_C'); }
use Class::C3;
sub foo { 'Diamond_D::foo => ' . (shift)->next::method() }
}
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');
is(Diamond_D->hello, 'Diamond_C::hello => Diamond_A::hello', '... method resolved itself as expected');
is(Diamond_D->can('hello')->('Diamond_D'),
'Diamond_C::hello => Diamond_A::hello',
'... can(method) resolved itself as expected');
is(UNIVERSAL::can("Diamond_D", 'hello')->('Diamond_D'),
'Diamond_C::hello => Diamond_A::hello',
'... can(method) resolved itself as expected');
is(Diamond_D->foo,
'Diamond_D::foo => Diamond_B::foo => Diamond_C::foo => Diamond_A::foo',
'... method foo resolved itself as expected');
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