#!/usr/bin/perl

use strict;

BEGIN {

	$|  = 1;

	$^W = 1;

	$ENV{PERL_PARAMS_UTIL_PP} ||= 1;

}

sub _CODELIKE($);

use Test::More;

use File::Spec::Functions ':ALL';

use Scalar::Util qw(

	blessed

	reftype

	refaddr

);

use overload;

sub c_ok { is(

	refaddr(_CODELIKE($_[0])),

	refaddr($_[0]),

	"callable: $_[1]",

) }

sub nc_ok {

	my $left = shift;

	$left = _CODELIKE($left);

	is( $left, undef, "not callable: $_[0]" );

}

my @callables = (

	"callable itself"                         => \&_CODELIKE,

	"a boring plain code ref"                 => sub {},

	'an object with overloaded &{}'           => C::O->new,

	'a object build from a coderef'           => C::C->new,

	'an object with inherited overloaded &{}' => C::O::S->new, 

	'a coderef blessed into CODE'             => (bless sub {} => 'CODE'),

);

my @uncallables = (

	"undef"                                   => undef,

	"a string"                                => "a string",

	"a number"                                => 19780720,

	"a ref to a ref to code"                  => \(sub {}),

	"a boring plain hash ref"                 => {},

	'a class that builds from coderefs'       => "C::C",

	'a class with overloaded &{}'             => "C::O",

	'a class with inherited overloaded &{}'   => "C::O::S",

	'a plain boring hash-based object'        => UC->new,

	'a non-coderef blessed into CODE'         => (bless {} => 'CODE'),

);

my $tests = (@callables + @uncallables) / 2 + 2;

if ( $] > 5.006 ) {

	push @uncallables, 'a regular expression', qr/foo/;

	$tests += 1;

}

plan tests => $tests;

# Import the function

use_ok( 'Params::Util', '_CODELIKE' );

ok( defined *_CODELIKE{CODE}, '_CODELIKE imported ok' );

while ( @callables ) {

	my $name   = shift @callables;

	my $object = shift @callables;

	c_ok( $object, $name );

}

while ( @uncallables ) {

	my $name   = shift @uncallables;

	my $object = shift @uncallables;

	nc_ok( $object, $name );

}

######################################################################

# callable: is a blessed code ref

package C::C;

sub new {

	bless sub {} => shift;

}

######################################################################

# callable: overloads &{}

# but only objects are callable, not class

package C::O;

sub new {

	bless {} => shift;

}

use overload '&{}'  => sub { sub {} };

use overload 'bool' => sub () { 1 };

######################################################################

# callable: subclasses C::O

package C::O::S;

use vars qw{@ISA};

BEGIN {

	@ISA = 'C::O';

}

######################################################################

# uncallable: some boring object with no codey magic

package UC;

sub new {

	bless {} => shift;

}