# check UNIVERSAL
#
-print "1..11\n";
+BEGIN {
+ chdir 't' if -d 't';
+ @INC = '../lib';
+ $| = 1;
+ require "./test.pl";
+}
+
+plan tests => 111;
$a = {};
bless $a, "Bob";
-print "not " unless $a->isa("Bob");
-print "ok 1\n";
+ok $a->isa("Bob");
package Human;
sub eat {}
package Alice;
@ISA=qw(Bob Female);
-sub drink {}
+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;
-print "not " unless $a->isa("Alice");
-print "ok 2\n";
+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");
-print "not " unless $a->isa("Bob");
-print "ok 3\n";
+ok $a->can("can");
+ok ! $a->can("export_tags"); # a method in Exporter
-print "not " unless $a->isa("Female");
-print "ok 4\n";
+cmp_ok eval { $a->VERSION }, '==', 2.718;
-print "not " unless $a->isa("Human");
-print "ok 5\n";
+ok ! (eval { $a->VERSION(2.719) });
+like $@, qr/^Alice version 2.719 required--this is only version 2.718 at /;
-print "not " if $a->isa("Male");
-print "ok 6\n";
+ok (eval { $a->VERSION(2.718) });
+is $@, '';
-print "not " unless $a->can("drink");
-print "ok 7\n";
+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 DOES VERSION";
+} else {
+ is $subs, "DOES VERSION can import isa";
+}
-print "not " unless $a->can("eat");
-print "ok 8\n";
+ok $a->isa("UNIVERSAL");
-print "not " if $a->can("sleep");
-print "ok 9\n";
+ok ! UNIVERSAL::isa([], "UNIVERSAL");
-print "not " unless UNIVERSAL::isa([], "ARRAY");
-print "ok 10\n";
+ok ! UNIVERSAL::can({}, "can");
-print "not " unless UNIVERSAL::isa({}, "HASH");
-print "ok 11\n";
+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 DOES VERSION";
+} else {
+ is $sub2, "DOES 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 $@, '';
+
+
+# This segfaulted in a blead.
+fresh_perl_is('package Foo; Foo->VERSION; print "ok"', 'ok');
+
+package Foo;
+
+sub DOES { 1 }
+
+package Bar;
+
+@Bar::ISA = 'Foo';
+
+package Baz;
+
+package main;
+ok( Foo->DOES( 'bar' ), 'DOES() should call DOES() on class' );
+ok( Bar->DOES( 'Bar' ), '... and should fall back to isa()' );
+ok( Bar->DOES( 'Foo' ), '... even when inherited' );
+ok( Baz->DOES( 'Baz' ), '... even without inheriting any other DOES()' );
+ok( ! Baz->DOES( 'Foo' ), '... returning true or false appropriately' );
+
+package Pig;
+package Bodine;
+Bodine->isa('Pig');
+*isa = \&UNIVERSAL::isa;
+eval { isa({}, 'HASH') };
+::is($@, '', "*isa correctly found");
+
+package main;
+eval { UNIVERSAL::DOES([], "foo") };
+like( $@, qr/Can't call method "DOES" on unblessed reference/,
+ 'DOES call error message says DOES, not isa' );