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|
use strict;
use warnings;
use Test::More;
use File::Spec;
use Class::MOP;
BEGIN {
require_ok(File::Spec->catfile('examples', 'LazyClass.pod'));
}
{
package BinaryTree;
use metaclass (
'attribute_metaclass' => 'LazyClass::Attribute',
'instance_metaclass' => 'LazyClass::Instance',
);
BinaryTree->meta->add_attribute('node' => (
accessor => 'node',
init_arg => 'node'
));
BinaryTree->meta->add_attribute('left' => (
reader => 'left',
default => sub { BinaryTree->new() }
));
BinaryTree->meta->add_attribute('right' => (
reader => 'right',
default => sub { BinaryTree->new() }
));
sub new {
my $class = shift;
bless $class->meta->new_object(@_) => $class;
}
}
my $root = BinaryTree->new('node' => 0);
isa_ok($root, 'BinaryTree');
ok(exists($root->{'node'}), '... node attribute has been initialized yet');
ok(!exists($root->{'left'}), '... left attribute has not been initialized yet');
ok(!exists($root->{'right'}), '... right attribute has not been initialized yet');
isa_ok($root->left, 'BinaryTree');
isa_ok($root->right, 'BinaryTree');
ok(exists($root->{'left'}), '... left attribute has now been initialized');
ok(exists($root->{'right'}), '... right attribute has now been initialized');
ok(!exists($root->left->{'node'}), '... node attribute has not been initialized yet');
ok(!exists($root->left->{'left'}), '... left attribute has not been initialized yet');
ok(!exists($root->left->{'right'}), '... right attribute has not been initialized yet');
ok(!exists($root->right->{'node'}), '... node attribute has not been initialized yet');
ok(!exists($root->right->{'left'}), '... left attribute has not been initialized yet');
ok(!exists($root->right->{'right'}), '... right attribute has not been initialized yet');
is($root->left->node(), undef, '... the left node is uninitialized');
ok(exists($root->left->{'node'}), '... node attribute has now been initialized');
$root->left->node(1);
is($root->left->node(), 1, '... the left node == 1');
ok(!exists($root->left->{'left'}), '... left attribute still has not been initialized yet');
ok(!exists($root->left->{'right'}), '... right attribute still has not been initialized yet');
is($root->right->node(), undef, '... the right node is uninitialized');
ok(exists($root->right->{'node'}), '... node attribute has now been initialized');
$root->right->node(2);
is($root->right->node(), 2, '... the right node == 1');
ok(!exists($root->right->{'left'}), '... left attribute still has not been initialized yet');
ok(!exists($root->right->{'right'}), '... right attribute still has not been initialized yet');
done_testing;
|
