make inlining a bit more easily extensible

[gitmo/Class-MOP.git] / t / 101_InstanceCountingClass_test.t

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;