1#!/usr/bin/perl -w
2
3BEGIN {
4    if( $ENV{PERL_CORE} ) {
5        chdir 't';
6        @INC = ('../lib', 'lib');
7    }
8    else {
9        unshift @INC, 't/lib';
10    }
11}
12
13use strict;
14use Test::More tests => 11;
15use TieOut;
16
17ok( !Test::Builder->is_fh("foo"), 'string is not a filehandle' );
18ok( !Test::Builder->is_fh(''),    'empty string' );
19ok( !Test::Builder->is_fh(undef), 'undef' );
20
21ok( open(FILE, '>foo') );
22END { close FILE; 1 while unlink 'foo' }
23
24ok( Test::Builder->is_fh(*FILE) );
25ok( Test::Builder->is_fh(\*FILE) );
26ok( Test::Builder->is_fh(*FILE{IO}) );
27
28tie *OUT, 'TieOut';
29ok( Test::Builder->is_fh(*OUT) );
30ok( Test::Builder->is_fh(\*OUT) );
31
32SKIP: {
33    skip "*TIED_HANDLE{IO} doesn't work in this perl", 1
34        unless defined *OUT{IO};
35    ok( Test::Builder->is_fh(*OUT{IO}) );
36}
37
38
39package Lying::isa;
40
41sub isa {
42    my $self = shift;
43    my $parent = shift;
44
45    return 1 if $parent eq 'IO::Handle';
46}
47
48::ok( Test::Builder->is_fh(bless {}, "Lying::isa"));
49