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
|
#!./perl
BEGIN {
chdir 't' if -d 't';
require './test.pl';
set_up_inc('../lib');
require Config;
}
use strict;
use feature 'isa';
no warnings 'experimental::isa';
plan 14;
package BaseClass {}
package DerivedClass { our @ISA = qw(BaseClass) }
package CustomClass {
sub isa { length($_[1]) == 9; }
}
my $baseobj = bless {}, "BaseClass";
my $derivedobj = bless {}, "DerivedClass";
my $customobj = bless {}, "CustomClass";
# Bareword package name
ok($baseobj isa BaseClass, '$baseobj isa BaseClass');
ok(not($baseobj isa Another::Class), '$baseobj is not Another::Class');
# String package name
ok($baseobj isa "BaseClass", '$baseobj isa BaseClass');
ok(not($baseobj isa "DerivedClass"), '$baseobj is not DerivedClass');
ok($derivedobj isa "DerivedClass", '$derivedobj isa DerivedClass');
ok($derivedobj isa "BaseClass", '$derivedobj isa BaseClass');
# Expression giving a package name
my $classname = "DerivedClass";
ok($derivedobj isa $classname, '$derivedobj isa DerivedClass via SV');
# Invoked on instance which overrides ->isa
ok($customobj isa "Something", '$customobj isa Something');
ok(not($customobj isa "SomethingElse"), '$customobj isa SomethingElse');
ok(not(undef isa "BaseClass"), 'undef is not BaseClass');
ok(not([] isa "BaseClass"), 'ARRAYref is not BaseClass');
# Test that isa object method still works.
ok($baseobj->isa('BaseClass'), '$baseobj isa BaseClass using object method');
ok(not($baseobj->isa('DerivedClass')), '$baseobj is not BaseClass using object method');
ok($derivedobj->isa('BaseClass'), '$derivedobj isa BaseClass using object method');
# TODO: Consider
# LHS = other class
|
