t/cmop/load.t

   1 use strict;
   2 use warnings;
   3
   4 # for instance, App::ForkProve
   5 my $preloaded;
   6 BEGIN { $preloaded = exists $INC{'Class/MOP.pm'} }
   7
   8 use Test::More;
   9
  10 use Class::Load qw(is_class_loaded);
  11
  12 BEGIN {
  13     use_ok('Class::MOP');
  14     use_ok('Class::MOP::Mixin');
  15     use_ok('Class::MOP::Mixin::AttributeCore');
  16     use_ok('Class::MOP::Mixin::HasAttributes');
  17     use_ok('Class::MOP::Mixin::HasMethods');
  18     use_ok('Class::MOP::Package');
  19     use_ok('Class::MOP::Module');
  20     use_ok('Class::MOP::Class');
  21     use_ok('Class::MOP::Class::Immutable::Trait');
  22     use_ok('Class::MOP::Method');
  23     use_ok('Class::MOP::Method');
  24     use_ok('Class::MOP::Method::Wrapped');
  25     use_ok('Class::MOP::Method::Inlined');
  26     use_ok('Class::MOP::Method::Generated');
  27     use_ok('Class::MOP::Method::Accessor');
  28     use_ok('Class::MOP::Method::Constructor');
  29     use_ok('Class::MOP::Method::Meta');
  30     use_ok('Class::MOP::Method::Overload');
  31     use_ok('Class::MOP::Instance');
  32     use_ok('Class::MOP::Object');
  33 }
  34
  35 # make sure we are tracking metaclasses correctly
  36
  37 my %METAS = (
  38     'Class::MOP::Attribute'         => Class::MOP::Attribute->meta,
  39     'Class::MOP::Method::Inlined' => Class::MOP::Method::Inlined->meta,
  40     'Class::MOP::Method::Generated' => Class::MOP::Method::Generated->meta,
  41     'Class::MOP::Method::Accessor'  => Class::MOP::Method::Accessor->meta,
  42     'Class::MOP::Method::Constructor' => Class::MOP::Method::Constructor->meta,
  43     'Class::MOP::Method::Meta' => Class::MOP::Method::Meta->meta,
  44     'Class::MOP::Method::Overload' => Class::MOP::Method::Overload->meta,
  45     'Class::MOP::Mixin'   => Class::MOP::Mixin->meta,
  46     'Class::MOP::Mixin::AttributeCore'   => Class::MOP::Mixin::AttributeCore->meta,
  47     'Class::MOP::Mixin::HasAttributes'   => Class::MOP::Mixin::HasAttributes->meta,
  48     'Class::MOP::Mixin::HasMethods'      => Class::MOP::Mixin::HasMethods->meta,
  49     'Class::MOP::Package'         => Class::MOP::Package->meta,
  50     'Class::MOP::Module'          => Class::MOP::Module->meta,
  51     'Class::MOP::Class'           => Class::MOP::Class->meta,
  52     'Class::MOP::Method'          => Class::MOP::Method->meta,
  53     'Class::MOP::Method::Wrapped' => Class::MOP::Method::Wrapped->meta,
  54     'Class::MOP::Instance'        => Class::MOP::Instance->meta,
  55     'Class::MOP::Object'          => Class::MOP::Object->meta,
  56     'Class::MOP::Class::Immutable::Trait' => Class::MOP::class_of('Class::MOP::Class::Immutable::Trait'),
  57     'Class::MOP::Class::Immutable::Class::MOP::Class' => Class::MOP::Class::Immutable::Class::MOP::Class->meta,
  58     'UNIVERSAL' => Class::MOP::class_of('UNIVERSAL'),
  59 );
  60
  61 ok( is_class_loaded($_), '... ' . $_ . ' is loaded' )
  62     for keys %METAS;
  63
  64 # The trait shouldn't be made immutable, it doesn't actually do anything, and
  65 # it doesn't even matter because it's not a class that will be
  66 # instantiated. Making UNIVERSAL immutable just seems like a bad idea.
  67 my %expect_mutable = map { $_ => 1 } qw( Class::MOP::Class::Immutable::Trait UNIVERSAL );
  68
  69 for my $meta (values %METAS) {
  70     if ( $expect_mutable{$meta->name} ) {
  71         ok( $meta->is_mutable(), '... ' . $meta->name . ' is mutable' );
  72     }
  73     else {
  74         ok( $meta->is_immutable(), '... ' . $meta->name . ' is immutable' );
  75     }
  76 }
  77
  78 SKIP: {
  79     skip "this list may be incorrect if we preloaded things", 3 if $preloaded;
  80     is_deeply(
  81         {Class::MOP::get_all_metaclasses},
  82         \%METAS,
  83         '... got all the metaclasses'
  84     );
  85
  86     is_deeply(
  87         [
  88             sort { $a->name cmp $b->name }
  89                  Class::MOP::get_all_metaclass_instances
  90         ],
  91         [
  92             Class::MOP::Attribute->meta,
  93             Class::MOP::Class->meta,
  94             Class::MOP::Class::Immutable::Class::MOP::Class->meta,
  95             Class::MOP::class_of('Class::MOP::Class::Immutable::Trait'),
  96             Class::MOP::Instance->meta,
  97             Class::MOP::Method->meta,
  98             Class::MOP::Method::Accessor->meta,
  99             Class::MOP::Method::Constructor->meta,
 100             Class::MOP::Method::Generated->meta,
 101             Class::MOP::Method::Inlined->meta,
 102             Class::MOP::Method::Meta->meta,
 103             Class::MOP::Method::Overload->meta,
 104             Class::MOP::Method::Wrapped->meta,
 105             Class::MOP::Mixin->meta,
 106             Class::MOP::Mixin::AttributeCore->meta,
 107             Class::MOP::Mixin::HasAttributes->meta,
 108             Class::MOP::Mixin::HasMethods->meta,
 109             Class::MOP::Module->meta,
 110             Class::MOP::Object->meta,
 111             Class::MOP::Package->meta,
 112             Class::MOP::class_of('UNIVERSAL'),
 113         ],
 114         '... got all the metaclass instances'
 115     );
 116
 117     is_deeply(
 118         [ sort { $a cmp $b } Class::MOP::get_all_metaclass_names() ],
 119         [
 120             sort qw/
 121                 Class::MOP::Attribute
 122                 Class::MOP::Class
 123                 Class::MOP::Class::Immutable::Class::MOP::Class
 124                 Class::MOP::Class::Immutable::Trait
 125                 Class::MOP::Mixin
 126                 Class::MOP::Mixin::AttributeCore
 127                 Class::MOP::Mixin::HasAttributes
 128                 Class::MOP::Mixin::HasMethods
 129                 Class::MOP::Instance
 130                 Class::MOP::Method
 131                 Class::MOP::Method::Accessor
 132                 Class::MOP::Method::Constructor
 133                 Class::MOP::Method::Generated
 134                 Class::MOP::Method::Inlined
 135                 Class::MOP::Method::Wrapped
 136                 Class::MOP::Method::Meta
 137                 Class::MOP::Method::Overload
 138                 Class::MOP::Module
 139                 Class::MOP::Object
 140                 Class::MOP::Package
 141                 UNIVERSAL
 142                 /,
 143         ],
 144         '... got all the metaclass names'
 145     );
 146 }
 147
 148 # testing the meta-circularity of the system
 149
 150 is(
 151     Class::MOP::Class->meta->meta, Class::MOP::Class->meta->meta->meta,
 152     '... Class::MOP::Class->meta->meta == Class::MOP::Class->meta->meta->meta'
 153 );
 154
 155 is(
 156     Class::MOP::Class->meta->meta->meta, Class::MOP::Class->meta->meta->meta->meta,
 157     '... Class::MOP::Class->meta->meta->meta == Class::MOP::Class->meta->meta->meta->meta'
 158 );
 159
 160 is(
 161     Class::MOP::Class->meta->meta, Class::MOP::Class->meta->meta->meta->meta,
 162     '... Class::MOP::Class->meta->meta == Class::MOP::Class->meta->meta->meta->meta'
 163 );
 164
 165 is(
 166     Class::MOP::Class->meta->meta, Class::MOP::Class->meta->meta->meta->meta->meta,
 167     '... Class::MOP::Class->meta->meta == Class::MOP::Class->meta->meta->meta->meta->meta'
 168 );
 169
 170 isa_ok(Class::MOP::Class->meta, 'Class::MOP::Class');
 171
 172 done_testing;