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#!/usr/bin/perl
use strict;
use warnings;
BEGIN { chdir 't'; require q(./test.pl); @INC = qw "../lib lib" }
plan(tests => 17);
{
{
package Foo;
use strict;
use warnings;
use mro 'c3';
sub new { bless {}, $_[0] }
sub bar { 'Foo::bar' }
}
# call the submethod in the direct instance
my $foo = Foo->new();
isa_ok($foo, 'Foo');
can_ok($foo, 'bar');
is($foo->bar(), 'Foo::bar', '... got the right return value');
# fail calling it from a subclass
{
package Bar;
use strict;
use warnings;
use mro 'c3';
our @ISA = ('Foo');
}
my $bar = Bar->new();
isa_ok($bar, 'Bar');
isa_ok($bar, 'Foo');
# test it working with with Sub::Name
SKIP: {
eval 'use Sub::Name';
skip("Sub::Name is required for this test", 3) if $@;
my $m = sub { (shift)->next::method() };
Sub::Name::subname('Bar::bar', $m);
{
no strict 'refs';
*{'Bar::bar'} = $m;
}
can_ok($bar, 'bar');
my $value = eval { $bar->bar() };
ok(!$@, '... calling bar() succedded') || diag $@;
is($value, 'Foo::bar', '... got the right return value too');
}
# test it failing without Sub::Name
{
package Baz;
use strict;
use warnings;
use mro 'c3';
our @ISA = ('Foo');
}
my $baz = Baz->new();
isa_ok($baz, 'Baz');
isa_ok($baz, 'Foo');
{
my $m = sub { (shift)->next::method() };
{
no strict 'refs';
*{'Baz::bar'} = $m;
}
eval { $baz->bar() };
ok($@, '... calling bar() with next::method failed') || diag $@;
}
# Test with non-existing class (used to segfault)
{
package Qux;
use mro;
sub foo { No::Such::Class->next::can }
}
eval { Qux->foo() };
is($@, '', "->next::can on non-existing package name");
}
# Test next::method/can with UNIVERSAL methods
{
package UNIVERSAL;
sub foo { "foo" }
sub kan { shift->next::can }
our @ISA = "a";
package a;
sub bar { "bar" }
sub baz { shift->next::can }
package M;
sub foo { shift->next::method }
sub bar { shift->next::method }
package main;
is eval { M->foo }, "foo", 'next::method with implicit UNIVERSAL';
is eval { M->bar }, "bar", 'n::m w/superclass of implicit UNIVERSAL';
is baz a, undef,
'univ superclasses next::cannot their own methods';
is kan UNIVERSAL, undef,
'UNIVERSAL next::cannot its own methods';
@a::ISA = 'b';
sub b::cnadd { shift->next::can }
is baz b, \&a::baz,
'univ supersuperclass noxt::can method in its immediate subclasses';
}
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