#!./perl
#
# check UNIVERSAL
#
BEGIN {
chdir 't' if -d 't';
@INC = '../lib';
$| = 1;
require "./test.pl";
}
plan tests => 104;
$a = {};
bless $a, "Bob";
ok $a->isa("Bob");
package Human;
sub eat {}
package Female;
@ISA=qw(Human);
package Alice;
@ISA=qw(Bob Female);
sub sing;
sub drink { return "drinking " . $_[1] }
sub new { bless {} }
$Alice::VERSION = 2.718;
{
package Cedric;
our @ISA;
use base qw(Human);
}
{
package Programmer;
our $VERSION = 1.667;
sub write_perl { 1 }
}
package main;
$a = new Alice;
ok $a->isa("Alice");
ok $a->isa("main::Alice"); # check that alternate class names work
ok(("main::Alice"->new)->isa("Alice"));
ok $a->isa("Bob");
ok $a->isa("main::Bob");
ok $a->isa("Female");
ok $a->isa("Human");
ok ! $a->isa("Male");
ok ! $a->isa('Programmer');
ok $a->isa("HASH");
ok $a->can("eat");
ok ! $a->can("sleep");
ok my $ref = $a->can("drink"); # returns a coderef
is $a->$ref("tea"), "drinking tea"; # ... which works
ok $ref = $a->can("sing");
eval { $a->$ref() };
ok $@; # ... but not if no actual subroutine
ok (!Cedric->isa('Programmer'));
ok (Cedric->isa('Human'));
push(@Cedric::ISA,'Programmer');
ok (Cedric->isa('Programmer'));
{
package Alice;
base::->import('Programmer');
}
ok $a->isa('Programmer');
ok $a->isa("Female");
@Cedric::ISA = qw(Bob);
ok (!Cedric->isa('Programmer'));
my $b = 'abc';
my @refs = qw(SCALAR SCALAR LVALUE GLOB ARRAY HASH CODE);
my @vals = ( \$b, \3.14, \substr($b,1,1), \*b, [], {}, sub {} );
for ($p=0; $p < @refs; $p++) {
for ($q=0; $q < @vals; $q++) {
is UNIVERSAL::isa($vals[$p], $refs[$q]), ($p==$q or $p+$q==1);
};
};
ok ! UNIVERSAL::can(23, "can");
ok $a->can("VERSION");
ok $a->can("can");
ok ! $a->can("export_tags"); # a method in Exporter
cmp_ok eval { $a->VERSION }, '==', 2.718;
ok ! (eval { $a->VERSION(2.719) });
like $@, qr/^Alice version 2.719 \(v2\.719\.0\) required--this is only version 2.718 \(v2\.718\.0\) at /;
ok (eval { $a->VERSION(2.718) });
is $@, '';
my $subs = join ' ', sort grep { defined &{"UNIVERSAL::$_"} } keys %UNIVERSAL::;
## The test for import here is *not* because we want to ensure that UNIVERSAL
## can always import; it is an historical accident that UNIVERSAL can import.
if ('a' lt 'A') {
is $subs, "can import isa VERSION";
} else {
is $subs, "VERSION can import isa";
}
ok $a->isa("UNIVERSAL");
ok ! UNIVERSAL::isa([], "UNIVERSAL");
ok ! UNIVERSAL::can({}, "can");
ok UNIVERSAL::isa(Alice => "UNIVERSAL");
cmp_ok UNIVERSAL::can(Alice => "can"), '==', \&UNIVERSAL::can;
# now use UNIVERSAL.pm and see what changes
eval "use UNIVERSAL";
ok $a->isa("UNIVERSAL");
my $sub2 = join ' ', sort grep { defined &{"UNIVERSAL::$_"} } keys %UNIVERSAL::;
# XXX import being here is really a bug
if ('a' lt 'A') {
is $sub2, "can import isa VERSION";
} else {
is $sub2, "VERSION can import isa";
}
eval 'sub UNIVERSAL::sleep {}';
ok $a->can("sleep");
ok ! UNIVERSAL::can($b, "can");
ok ! $a->can("export_tags"); # a method in Exporter
ok ! UNIVERSAL::isa("\xff\xff\xff\0", 'HASH');
{
package Pickup;
use UNIVERSAL qw( isa can VERSION );
::ok isa "Pickup", UNIVERSAL;
::cmp_ok can( "Pickup", "can" ), '==', \&UNIVERSAL::can;
::ok VERSION "UNIVERSAL" ;
}
{
# test isa() and can() on magic variables
"Human" =~ /(.*)/;
ok $1->isa("Human");
ok $1->can("eat");
package HumanTie;
sub TIESCALAR { bless {} }
sub FETCH { "Human" }
tie my($x), "HumanTie";
::ok $x->isa("Human");
::ok $x->can("eat");
}
# bugid 3284
# a second call to isa('UNIVERSAL') when @ISA is null failed due to caching
@X::ISA=();
my $x = {}; bless $x, 'X';
ok $x->isa('UNIVERSAL');
ok $x->isa('UNIVERSAL');
# Check that the "historical accident" of UNIVERSAL having an import()
# method doesn't effect anyone else.
eval { Some::Package->import("bar") };
is $@, '';
# This segfaulted in a blead.
fresh_perl_is('package Foo; Foo->VERSION; print "ok"', 'ok');