Moose::Meta::Class needs a package?

[Boldra]

I'm using Moose::Meta::Class directly to test a plugin interface.

Plugin interface:

sub load_plugin {
    my $class = "My::Plugin::$_[0]";
    eval "use $class"
    return $class->new
}

Any my tests share the _make_fake_plugin sub:

package Emtpy;
use Moose;
package main;

sub _make_fake_plugin {
    my $class = "My::Plugin::$_[0]";
    $INC{"My/Plugin/$_[0].pm"} = 1;
    Moose::Meta::Class->create(
        $class => (
            methods => {
                run => sub { push @FAKE_PLUGIN_LOG, \@_ }
            },
            superclasses => [ qw<Empty> ],
            roles => [ qw<My::Plugin> ],
        ),
    );
}

Naturally there's quite a few checks in load_plugin which I'm not showing (and the role). Those are what I'm actually testing.

What I'm really curious about, is the need for the Empty package. If I substitute the Empty for Moose directly I get the error:

Can't locate object method "class_precedence_list" via package "Class:
+:MOP::Package"

I stole this syntax from the Moose::Meta::Class tests, (the doc is a bit thin) but I don't understand it. Can anyone explain why this is needed? Is there a cleaner way?

thanks