Mouse::Role improved

[gitmo/Mouse.git] / t / 030_roles / failing / 007_roles_and_req_method_edge_cases.t

#!/usr/bin/perl

use strict;
use warnings;

use Test::More tests => 15;
use Test::Exception;

=pod

NOTE:
A fair amount of these tests will likely be irrelevant
once we have more fine grained control over the class
building process. A lot of the edge cases tested here
are actually related to class construction order and
not any real functionality.
- SL

Role which requires a method implemented
in another role as an override (it does
not remove the requirement)

=cut

{
    package Role::RequireFoo;
    use strict;
    use warnings;
    use Mouse::Role;

    requires 'foo';

    package Role::ProvideFoo;
    use strict;
    use warnings;
    use Mouse::Role;

    ::lives_ok {
        with 'Role::RequireFoo';
    } '... the required "foo" method will not exist yet (but we will live)';

    override 'foo' => sub { 'Role::ProvideFoo::foo' };
}

is_deeply(
    [ Role::ProvideFoo->meta->get_required_method_list ],
    [ 'foo' ],
    '... foo method is still required for Role::ProvideFoo');

=pod

Role which requires a method implemented
in the consuming class as an override.
It will fail since method modifiers are
second class citizens.

=cut

{
    package Class::ProvideFoo::Base;
    use Mouse;

    sub foo { 'Class::ProvideFoo::Base::foo' }

    package Class::ProvideFoo::Override1;
    use Mouse;

    extends 'Class::ProvideFoo::Base';

    ::lives_ok {
        with 'Role::RequireFoo';
    } '... the required "foo" method will be found in the superclass';

    override 'foo' => sub { 'Class::ProvideFoo::foo' };

    package Class::ProvideFoo::Override2;
    use Mouse;

    extends 'Class::ProvideFoo::Base';

    override 'foo' => sub { 'Class::ProvideFoo::foo' };

    ::lives_ok {
        with 'Role::RequireFoo';
    } '... the required "foo" method exists, although it is overriden locally';

}

=pod

Now same thing, but with a before
method modifier.

=cut

{
    package Class::ProvideFoo::Before1;
    use Mouse;

    extends 'Class::ProvideFoo::Base';

    ::lives_ok {
        with 'Role::RequireFoo';
    } '... the required "foo" method will be found in the superclass';

    before 'foo' => sub { 'Class::ProvideFoo::foo:before' };

    package Class::ProvideFoo::Before2;
    use Mouse;

    extends 'Class::ProvideFoo::Base';

    before 'foo' => sub { 'Class::ProvideFoo::foo:before' };

    ::lives_ok {
        with 'Role::RequireFoo';
    } '... the required "foo" method exists, although it is a before modifier locally';

    package Class::ProvideFoo::Before3;
    use Mouse;

    extends 'Class::ProvideFoo::Base';

    sub foo { 'Class::ProvideFoo::foo' }
    before 'foo' => sub { 'Class::ProvideFoo::foo:before' };

    ::lives_ok {
        with 'Role::RequireFoo';
    } '... the required "foo" method exists locally, and it is modified locally';

    package Class::ProvideFoo::Before4;
    use Mouse;

    extends 'Class::ProvideFoo::Base';

    sub foo { 'Class::ProvideFoo::foo' }
    before 'foo' => sub { 'Class::ProvideFoo::foo:before' };

    ::isa_ok(__PACKAGE__->meta->get_method('foo'), 'Class::MOP::Method::Wrapped');
    ::is(__PACKAGE__->meta->get_method('foo')->get_original_method->package_name, __PACKAGE__,
    '... but the original method is from our package');

    ::lives_ok {
        with 'Role::RequireFoo';
    } '... the required "foo" method exists in the symbol table (and we will live)';

}

=pod

Now same thing, but with a method from an attribute
method modifier.

=cut

{

    package Class::ProvideFoo::Attr1;
    use Mouse;

    extends 'Class::ProvideFoo::Base';

    ::lives_ok {
        with 'Role::RequireFoo';
    } '... the required "foo" method will be found in the superclass (but then overriden)';

    has 'foo' => (is => 'ro');

    package Class::ProvideFoo::Attr2;
    use Mouse;

    extends 'Class::ProvideFoo::Base';

    has 'foo' => (is => 'ro');

    ::lives_ok {
        with 'Role::RequireFoo';
    } '... the required "foo" method exists, and is an accessor';
}

# ...
# a method required in a role, but then
# implemented in the superclass (as an
# attribute accessor too)

{
    package Foo::Class::Base;
    use Mouse;

    has 'bar' =>  (
        isa     => 'Int',
        is      => 'rw',
        default => sub { 1 }
    );
}
{
    package Foo::Role;
    use Mouse::Role;

    requires 'bar';

    has 'foo' => (
        isa     => 'Int',
        is      => 'rw',
        lazy    => 1,
        default => sub { (shift)->bar + 1 }
    );
}
{
    package Foo::Class::Child;
    use Mouse;
    extends 'Foo::Class::Base';

    ::lives_ok {
        with 'Foo::Role';
    } '... our role combined successfully';
}

# a method required in a role and implemented in a superclass, with a method
# modifier in the subclass.  this should live, but dies in 0.26 -- hdp,
# 2007-10-11

{
    package Bar::Class::Base;
    use Mouse;

    sub bar { "hello!" }
}
{
    package Bar::Role;
    use Mouse::Role;
    requires 'bar';
}
{
    package Bar::Class::Child;
    use Mouse;
    extends 'Bar::Class::Base';
    after bar => sub { "o noes" };
    # technically we could run lives_ok here, too, but putting it into a
    # grandchild class makes it more obvious why this matters.
}
{
    package Bar::Class::Grandchild;
    use Mouse;
    extends 'Bar::Class::Child';
    ::lives_ok {
        with 'Bar::Role';
    } 'required method exists in superclass as non-modifier, so we live';
}

{
    package Bar2::Class::Base;
    use Mouse;

    sub bar { "hello!" }
}
{
    package Bar2::Role;
    use Mouse::Role;
    requires 'bar';
}
{
    package Bar2::Class::Child;
    use Mouse;
    extends 'Bar2::Class::Base';
    override bar => sub { "o noes" };
    # technically we could run lives_ok here, too, but putting it into a
    # grandchild class makes it more obvious why this matters.
}
{
    package Bar2::Class::Grandchild;
    use Mouse;
    extends 'Bar2::Class::Child';
    ::lives_ok {
        with 'Bar2::Role';
    } 'required method exists in superclass as non-modifier, so we live';
}