t/107_C3MethodDispatchOrder_test.t

   1 use strict;
   2 use warnings;
   3
   4 use Test::More;
   5 use File::Spec;
   6 use Class::MOP;
   7
   8 BEGIN {
   9     eval "use Algorithm::C3";
  10     plan skip_all => "Algorithm::C3 required for this test" if $@;
  11     require_ok(File::Spec->catfile('examples', 'C3MethodDispatchOrder.pod'));
  12 }
  13
  14 {
  15     package Diamond_A;
  16     use metaclass 'C3MethodDispatchOrder';
  17
  18     sub hello { 'Diamond_A::hello' }
  19
  20     package Diamond_B;
  21     use metaclass 'C3MethodDispatchOrder';
  22     __PACKAGE__->meta->superclasses('Diamond_A');
  23
  24     package Diamond_C;
  25     use metaclass 'C3MethodDispatchOrder';
  26     __PACKAGE__->meta->superclasses('Diamond_A');
  27
  28     sub hello { 'Diamond_C::hello' }
  29
  30     package Diamond_D;
  31     use metaclass 'C3MethodDispatchOrder';
  32     __PACKAGE__->meta->superclasses('Diamond_B', 'Diamond_C');
  33 }
  34
  35 is_deeply(
  36     [ Diamond_D->meta->class_precedence_list ],
  37     [ qw(Diamond_D Diamond_B Diamond_C Diamond_A) ],
  38     '... got the right MRO for Diamond_D');
  39
  40 is(Diamond_D->hello, 'Diamond_C::hello', '... got the right dispatch order');
  41 is(Diamond_D->can('hello')->(), 'Diamond_C::hello', '... can(method) resolved itself as expected');
  42
  43 done_testing;