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Re: [perl #19566] Perl 5.8.0 segfault
[perl5.git] / t / op / universal.t
CommitLineData
44a8e56a
PP
1#!./perl
2#
3# check UNIVERSAL
4#
5
e09f3e01
G
6BEGIN {
7 chdir 't' if -d 't';
20822f61 8 @INC = '../lib';
46e4b22b 9 $| = 1;
e09f3e01
G
10}
11
178d71da 12print "1..94\n";
44a8e56a
PP
13
14$a = {};
15bless $a, "Bob";
ff0cee69
PP
16print "not " unless $a->isa("Bob");
17print "ok 1\n";
44a8e56a 18
ff0cee69
PP
19package Human;
20sub eat {}
44a8e56a 21
ff0cee69
PP
22package Female;
23@ISA=qw(Human);
44a8e56a 24
ff0cee69
PP
25package Alice;
26@ISA=qw(Bob Female);
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TB
27sub sing;
28sub drink { return "drinking " . $_[1] }
ff0cee69 29sub new { bless {} }
44a8e56a 30
e09f3e01
G
31$Alice::VERSION = 2.718;
32
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GS
33{
34 package Cedric;
35 our @ISA;
36 use base qw(Human);
37}
38
39{
40 package Programmer;
41 our $VERSION = 1.667;
42
43 sub write_perl { 1 }
44}
45
44a8e56a 46package main;
e09f3e01 47
39d11b7f 48{ my $i = 2;
ea8fae29
BS
49 sub test {
50 print "not " unless $_[0];
51 print "ok ", $i++;
986114cf 52 print " # at ", (caller)[1], ", line ", (caller)[2] unless $_[0];
ea8fae29
BS
53 print "\n";
54 }
39d11b7f 55}
e09f3e01 56
ff0cee69 57$a = new Alice;
44a8e56a 58
e09f3e01 59test $a->isa("Alice");
301daebc 60test $a->isa("main::Alice"); # check that alternate class names work
44a8e56a 61
178d71da
RGS
62test(("main::Alice"->new)->isa("Alice"));
63
e09f3e01 64test $a->isa("Bob");
301daebc 65test $a->isa("main::Bob");
e09f3e01
G
66
67test $a->isa("Female");
68
69test $a->isa("Human");
70
71test ! $a->isa("Male");
72
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GS
73test ! $a->isa('Programmer');
74
986114cf
BS
75test $a->isa("HASH");
76
e09f3e01 77test $a->can("eat");
e09f3e01 78test ! $a->can("sleep");
39d11b7f
TB
79test my $ref = $a->can("drink"); # returns a coderef
80test $a->$ref("tea") eq "drinking tea"; # ... which works
81test $ref = $a->can("sing");
444e39b5 82eval { $a->$ref() };
39d11b7f 83test $@; # ... but not if no actual subroutine
e09f3e01 84
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GS
85test (!Cedric->isa('Programmer'));
86
87test (Cedric->isa('Human'));
88
89push(@Cedric::ISA,'Programmer');
90
91test (Cedric->isa('Programmer'));
92
93{
94 package Alice;
95 base::->import('Programmer');
96}
97
98test $a->isa('Programmer');
99test $a->isa("Female");
100
101@Cedric::ISA = qw(Bob);
102
103test (!Cedric->isa('Programmer'));
104
e09f3e01
G
105my $b = 'abc';
106my @refs = qw(SCALAR SCALAR LVALUE GLOB ARRAY HASH CODE);
107my @vals = ( \$b, \3.14, \substr($b,1,1), \*b, [], {}, sub {} );
108for ($p=0; $p < @refs; $p++) {
109 for ($q=0; $q < @vals; $q++) {
110 test UNIVERSAL::isa($vals[$p], $refs[$q]) eq ($p==$q or $p+$q==1);
111 };
112};
113
114test ! UNIVERSAL::can(23, "can");
115
116test $a->can("VERSION");
117
118test $a->can("can");
84902520 119test ! $a->can("export_tags"); # a method in Exporter
e09f3e01
G
120
121test (eval { $a->VERSION }) == 2.718;
122
123test ! (eval { $a->VERSION(2.719) }) &&
ae165b0c 124 $@ =~ /^Alice version 2.71(?:9|8999\d+) required--this is only version 2.718 at /;
44a8e56a 125
e09f3e01 126test (eval { $a->VERSION(2.718) }) && ! $@;
ff0cee69 127
e09f3e01 128my $subs = join ' ', sort grep { defined &{"UNIVERSAL::$_"} } keys %UNIVERSAL::;
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BS
129## The test for import here is *not* because we want to ensure that UNIVERSAL
130## can always import; it is an historical accident that UNIVERSAL can import.
9d116dd7 131if ('a' lt 'A') {
ea8fae29 132 test $subs eq "can import isa VERSION";
9d116dd7 133} else {
ea8fae29 134 test $subs eq "VERSION can import isa";
9d116dd7 135}
ff0cee69 136
e09f3e01 137test $a->isa("UNIVERSAL");
ff0cee69 138
b4c2bf25
MG
139test ! UNIVERSAL::isa([], "UNIVERSAL");
140
141test ! UNIVERSAL::can({}, "can");
142
143test UNIVERSAL::isa(Alice => "UNIVERSAL");
144
145test UNIVERSAL::can(Alice => "can") == \&UNIVERSAL::can;
146
84902520 147# now use UNIVERSAL.pm and see what changes
e09f3e01 148eval "use UNIVERSAL";
ff0cee69 149
e09f3e01 150test $a->isa("UNIVERSAL");
44a8e56a 151
46e4b22b 152my $sub2 = join ' ', sort grep { defined &{"UNIVERSAL::$_"} } keys %UNIVERSAL::;
84902520 153# XXX import being here is really a bug
9d116dd7
JH
154if ('a' lt 'A') {
155 test $sub2 eq "can import isa VERSION";
156} else {
157 test $sub2 eq "VERSION can import isa";
158}
44a8e56a 159
e09f3e01
G
160eval 'sub UNIVERSAL::sleep {}';
161test $a->can("sleep");
44a8e56a 162
e09f3e01 163test ! UNIVERSAL::can($b, "can");
84902520
TB
164
165test ! $a->can("export_tags"); # a method in Exporter
83f7a2bc
GS
166
167test ! UNIVERSAL::isa("\xff\xff\xff\0", 'HASH');
ea8fae29
BS
168
169{
170 package Pickup;
171 use UNIVERSAL qw( isa can VERSION );
172
173 main::test isa "Pickup", UNIVERSAL;
174 main::test can( "Pickup", "can" ) == \&UNIVERSAL::can;
175 main::test VERSION "UNIVERSAL" ;
176}