Test as requested by autarch

[gitmo/Class-MOP.git] / t / 070_immutable_metaclass.t

use strict;
use warnings;

use Test::More tests => 75;
use Test::Exception;

use Class::MOP;

{
    package Foo;

    use strict;
    use warnings;
    use metaclass;

    __PACKAGE__->meta->add_attribute('bar');

    package Bar;

    use strict;
    use warnings;
    use metaclass;

    __PACKAGE__->meta->superclasses('Foo');

    __PACKAGE__->meta->add_attribute('baz');

    package Baz;

    use strict;
    use warnings;
    use metaclass;

    __PACKAGE__->meta->superclasses('Bar');

    __PACKAGE__->meta->add_attribute('bah');
}

{
    my $meta = Foo->meta;
    my $original_metaclass_name = ref $meta;

    $meta->make_immutable;

    my $immutable_metaclass = $meta->_immutable_metaclass->meta;

    my $immutable_class_name = $immutable_metaclass->name;

    ok( !$immutable_class_name->is_mutable,  '... immutable_metaclass is not mutable' );
    ok( $immutable_class_name->is_immutable, '... immutable_metaclass is immutable' );
    is( $immutable_class_name->meta, $immutable_metaclass,
        '... immutable_metaclass meta hack works' );

    isa_ok( $meta, "Class::MOP::Class::Immutable::Trait" );
    isa_ok( $meta, "Class::MOP::Class" );

}

{
    my $meta = Foo->meta;
    is( $meta->name, 'Foo', '... checking the Foo metaclass' );

    ok( !$meta->is_mutable,    '... our class is not mutable' );
    ok( $meta->is_immutable, '... our class is immutable' );

    isa_ok( $meta, 'Class::MOP::Class' );

    dies_ok { $meta->add_method() } '... exception thrown as expected';
    dies_ok { $meta->alias_method() } '... exception thrown as expected';
    dies_ok { $meta->remove_method() } '... exception thrown as expected';

    dies_ok { $meta->add_attribute() } '... exception thrown as expected';
    dies_ok { $meta->remove_attribute() } '... exception thrown as expected';

    dies_ok { $meta->add_package_symbol() }
    '... exception thrown as expected';
    dies_ok { $meta->remove_package_symbol() }
    '... exception thrown as expected';

    lives_ok { $meta->identifier() }
    '... no exception for get_package_symbol special case';

    my @supers;
    lives_ok {
        @supers = $meta->superclasses;
    }
    '... got the superclasses okay';

    dies_ok { $meta->superclasses( ['UNIVERSAL'] ) }
    '... but could not set the superclasses okay';

    my $meta_instance;
    lives_ok {
        $meta_instance = $meta->get_meta_instance;
    }
    '... got the meta instance okay';
    isa_ok( $meta_instance, 'Class::MOP::Instance' );
    is( $meta_instance, $meta->get_meta_instance,
        '... and we know it is cached' );

    my @cpl;
    lives_ok {
        @cpl = $meta->class_precedence_list;
    }
    '... got the class precedence list okay';
    is_deeply(
        \@cpl,
        ['Foo'],
        '... we just have ourselves in the class precedence list'
    );

    my @attributes;
    lives_ok {
        @attributes = $meta->get_all_attributes;
    }
    '... got the attribute list okay';
    is_deeply(
        \@attributes,
        [ $meta->get_attribute('bar') ],
        '... got the right list of attributes'
    );
}

{
    my $meta = Bar->meta;
    is( $meta->name, 'Bar', '... checking the Bar metaclass' );

    ok( $meta->is_mutable,    '... our class is mutable' );
    ok( !$meta->is_immutable, '... our class is not immutable' );

    lives_ok {
        $meta->make_immutable();
    }
    '... changed Bar to be immutable';

    ok( !$meta->make_immutable, '... make immutable now returns nothing' );

    ok( !$meta->is_mutable,  '... our class is no longer mutable' );
    ok( $meta->is_immutable, '... our class is now immutable' );

    isa_ok( $meta, 'Class::MOP::Class' );

    dies_ok { $meta->add_method() } '... exception thrown as expected';
    dies_ok { $meta->alias_method() } '... exception thrown as expected';
    dies_ok { $meta->remove_method() } '... exception thrown as expected';

    dies_ok { $meta->add_attribute() } '... exception thrown as expected';
    dies_ok { $meta->remove_attribute() } '... exception thrown as expected';

    dies_ok { $meta->add_package_symbol() }
    '... exception thrown as expected';
    dies_ok { $meta->remove_package_symbol() }
    '... exception thrown as expected';

    my @supers;
    lives_ok {
        @supers = $meta->superclasses;
    }
    '... got the superclasses okay';

    dies_ok { $meta->superclasses( ['UNIVERSAL'] ) }
    '... but could not set the superclasses okay';

    my $meta_instance;
    lives_ok {
        $meta_instance = $meta->get_meta_instance;
    }
    '... got the meta instance okay';
    isa_ok( $meta_instance, 'Class::MOP::Instance' );
    is( $meta_instance, $meta->get_meta_instance,
        '... and we know it is cached' );

    my @cpl;
    lives_ok {
        @cpl = $meta->class_precedence_list;
    }
    '... got the class precedence list okay';
    is_deeply(
        \@cpl,
        [ 'Bar', 'Foo' ],
        '... we just have ourselves in the class precedence list'
    );

    my @attributes;
    lives_ok {
        @attributes = $meta->get_all_attributes;
    }
    '... got the attribute list okay';
    is_deeply(
        [ sort { $a->name cmp $b->name } @attributes ],
        [ Foo->meta->get_attribute('bar'), $meta->get_attribute('baz') ],
        '... got the right list of attributes'
    );
}

{
    my $meta = Baz->meta;
    is( $meta->name, 'Baz', '... checking the Baz metaclass' );

    ok( $meta->is_mutable,    '... our class is mutable' );
    ok( !$meta->is_immutable, '... our class is not immutable' );

    lives_ok {
        $meta->make_immutable();
    }
    '... changed Baz to be immutable';

    ok( !$meta->make_immutable, '... make immutable now returns nothing' );

    ok( !$meta->is_mutable,  '... our class is no longer mutable' );
    ok( $meta->is_immutable, '... our class is now immutable' );

    isa_ok( $meta, 'Class::MOP::Class' );

    dies_ok { $meta->add_method() } '... exception thrown as expected';
    dies_ok { $meta->alias_method() } '... exception thrown as expected';
    dies_ok { $meta->remove_method() } '... exception thrown as expected';

    dies_ok { $meta->add_attribute() } '... exception thrown as expected';
    dies_ok { $meta->remove_attribute() } '... exception thrown as expected';

    dies_ok { $meta->add_package_symbol() }
    '... exception thrown as expected';
    dies_ok { $meta->remove_package_symbol() }
    '... exception thrown as expected';

    my @supers;
    lives_ok {
        @supers = $meta->superclasses;
    }
    '... got the superclasses okay';

    dies_ok { $meta->superclasses( ['UNIVERSAL'] ) }
    '... but could not set the superclasses okay';

    my $meta_instance;
    lives_ok {
        $meta_instance = $meta->get_meta_instance;
    }
    '... got the meta instance okay';
    isa_ok( $meta_instance, 'Class::MOP::Instance' );
    is( $meta_instance, $meta->get_meta_instance,
        '... and we know it is cached' );

    my @cpl;
    lives_ok {
        @cpl = $meta->class_precedence_list;
    }
    '... got the class precedence list okay';
    is_deeply(
        \@cpl,
        [ 'Baz', 'Bar', 'Foo' ],
        '... we just have ourselves in the class precedence list'
    );

    my @attributes;
    lives_ok {
        @attributes = $meta->get_all_attributes;
    }
    '... got the attribute list okay';
    is_deeply(
        [ sort { $a->name cmp $b->name } @attributes ],
        [
            $meta->get_attribute('bah'), Foo->meta->get_attribute('bar'),
            Bar->meta->get_attribute('baz')
        ],
        '... got the right list of attributes'
    );
}