t/107_C3MethodDispatchOrder_test.t

   1 #!/usr/bin/perl
   2
   3 use strict;
   4 use warnings;
   5
   6 use Test::More;
   7 use File::Spec;
   8
   9 BEGIN {
  10     eval "use Algorithm::C3";
  11     plan skip_all => "Algorithm::C3 required for this test" if $@;
  12     plan tests => 4;use Class::MOP;
  13     require_ok(File::Spec->catfile('examples', 'C3MethodDispatchOrder.pod'));
  14 }
  15
  16 {
  17     package Diamond_A;
  18     use metaclass 'C3MethodDispatchOrder';
  19
  20     sub hello { 'Diamond_A::hello' }
  21
  22     package Diamond_B;
  23     use metaclass 'C3MethodDispatchOrder';
  24     __PACKAGE__->meta->superclasses('Diamond_A');
  25
  26     package Diamond_C;
  27     use metaclass 'C3MethodDispatchOrder';
  28     __PACKAGE__->meta->superclasses('Diamond_A');
  29
  30     sub hello { 'Diamond_C::hello' }
  31
  32     package Diamond_D;
  33     use metaclass 'C3MethodDispatchOrder';
  34     __PACKAGE__->meta->superclasses('Diamond_B', 'Diamond_C');
  35 }
  36
  37 is_deeply(
  38     [ Diamond_D->meta->class_precedence_list ],
  39     [ qw(Diamond_D Diamond_B Diamond_C Diamond_A) ],
  40     '... got the right MRO for Diamond_D');
  41
  42 is(Diamond_D->hello, 'Diamond_C::hello', '... got the right dispatch order');
  43 is(Diamond_D->can('hello')->(), 'Diamond_C::hello', '... can(method) resolved itself as expected');
  44
  45