$| = 1;
}
-print "1..80\n";
+print "1..94\n";
$a = {};
bless $a, "Bob";
package Alice;
@ISA=qw(Bob Female);
-sub drink {}
+sub sing;
+sub drink { return "drinking " . $_[1] }
sub new { bless {} }
$Alice::VERSION = 2.718;
package main;
-my $i = 2;
-sub test { print "not " unless shift; print "ok $i\n"; $i++; }
+{ my $i = 2;
+ sub test {
+ print "not " unless $_[0];
+ print "ok ", $i++;
+ print " # at ", (caller)[1], ", line ", (caller)[2] unless $_[0];
+ print "\n";
+ }
+}
$a = new Alice;
test $a->isa("Alice");
+test $a->isa("main::Alice"); # check that alternate class names work
+
+test(("main::Alice"->new)->isa("Alice"));
test $a->isa("Bob");
+test $a->isa("main::Bob");
test $a->isa("Female");
test ! $a->isa('Programmer');
-test $a->can("drink");
+test $a->isa("HASH");
test $a->can("eat");
-
test ! $a->can("sleep");
+test my $ref = $a->can("drink"); # returns a coderef
+test $a->$ref("tea") eq "drinking tea"; # ... which works
+test $ref = $a->can("sing");
+eval { $a->$ref() };
+test $@; # ... but not if no actual subroutine
test (!Cedric->isa('Programmer'));
test (eval { $a->VERSION(2.718) }) && ! $@;
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') {
- test $subs eq "can isa VERSION";
+ test $subs eq "can import isa VERSION";
} else {
- test $subs eq "VERSION can isa";
+ test $subs eq "VERSION can import isa";
}
test $a->isa("UNIVERSAL");
+test ! UNIVERSAL::isa([], "UNIVERSAL");
+
+test ! UNIVERSAL::can({}, "can");
+
+test UNIVERSAL::isa(Alice => "UNIVERSAL");
+
+test UNIVERSAL::can(Alice => "can") == \&UNIVERSAL::can;
+
# now use UNIVERSAL.pm and see what changes
eval "use UNIVERSAL";
test ! $a->can("export_tags"); # a method in Exporter
test ! UNIVERSAL::isa("\xff\xff\xff\0", 'HASH');
+
+{
+ package Pickup;
+ use UNIVERSAL qw( isa can VERSION );
+
+ main::test isa "Pickup", UNIVERSAL;
+ main::test can( "Pickup", "can" ) == \&UNIVERSAL::can;
+ main::test VERSION "UNIVERSAL" ;
+}