1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
use strict;
use warnings;
use Test::More tests => 12;
use UNIVERSAL::isa 'isa';
use warnings 'UNIVERSAL::isa';
{
package Foo;
sub isa { 1 }
}
{
package Bar;
}
my $foo = bless {}, 'Foo';
my $bar = bless {}, 'Bar';
{
my $warning = '';
local $SIG{__WARN__} = sub { $warning = shift };
UNIVERSAL::isa( $foo, 'Foo' );
like( $warning, qr/Called UNIVERSAL::isa\(\) as a function.+warnings.t/s,
'U::i should warn by default when redirecting to overridden method' );
$warning = '';
UNIVERSAL::isa( $foo, 'Bar' );
like( $warning, qr/Called UNIVERSAL::isa\(\) as a function.+warnings.t/s,
'... even if isa() would return false' );
$warning = '';
$foo->isa( 'Bar' );
is( $warning, '', 'No warnings when called properly, as a method' );
$warning = '';
UNIVERSAL::isa( $bar, 'Foo' );
is( $warning, '', '... but not by default on default isa()' );
$warning = '';
UNIVERSAL::isa( $bar, 'Bar' );
is( $warning, '', '... even when it would return false' );
$warning = '';
$bar->isa( 'Bar' );
is( $warning, '', 'No warnings when called properly, as a method' );
}
{
UNIVERSAL::isa::->import( 'verbose' );
my $warning = '';
local $SIG{__WARN__} = sub { $warning = shift };
UNIVERSAL::isa( $foo, 'Foo' );
like( $warning, qr/Called UNIVERSAL::isa\(\) as a function.+warnings.t/s,
'U::i should warn when verbose when redirecting to overridden method' );
$warning = '';
UNIVERSAL::isa( $foo, 'Bar' );
like( $warning, qr/Called UNIVERSAL::isa\(\) as a function.+warnings.t/s,
'... even if isa() would return false' );
$warning = '';
$foo->isa( 'Bar' );
is( $warning, '', 'No warnings when called properly, as a method' );
$warning = '';
UNIVERSAL::isa( $bar, 'Foo' );
like( $warning, qr/Called UNIVERSAL::isa\(\) as a function.+warnings.t/s,
'... and on default isa()' );
$warning = '';
UNIVERSAL::isa( $bar, 'Bar' );
like( $warning, qr/Called UNIVERSAL::isa\(\) as a function.+warnings.t/s,
'... even when it would return false' );
TODO: {
local $TODO = 'no apparent way of distinguishing between being called as a function and a method';
$warning = '';
$bar->isa( 'Bar' );
is( $warning, '', 'No warnings when called properly, as a method' );
}
}
|
