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use strict;
use warnings;
use Test::More;
use File::Spec;
use Class::MOP;
BEGIN {
require_ok(File::Spec->catfile('examples', 'InstanceCountingClass.pod'));
}
=pod
This is a trivial and contrived example of how to
make a metaclass which will count all the instances
created. It is not meant to be anything more than
a simple demonstration of how to make a metaclass.
=cut
{
package Foo;
use metaclass 'InstanceCountingClass';
sub new {
my $class = shift;
$class->meta->new_object(@_);
}
package Bar;
our @ISA = ('Foo');
}
is(Foo->meta->get_count(), 0, '... our Foo count is 0');
is(Bar->meta->get_count(), 0, '... our Bar count is 0');
my $foo = Foo->new();
isa_ok($foo, 'Foo');
is(Foo->meta->get_count(), 1, '... our Foo count is now 1');
is(Bar->meta->get_count(), 0, '... our Bar count is still 0');
my $bar = Bar->new();
isa_ok($bar, 'Bar');
is(Foo->meta->get_count(), 1, '... our Foo count is still 1');
is(Bar->meta->get_count(), 1, '... our Bar count is now 1');
for (2 .. 10) {
Foo->new();
}
is(Foo->meta->get_count(), 10, '... our Foo count is now 10');
is(Bar->meta->get_count(), 1, '... our Bar count is still 1');
done_testing;
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