X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=t%2Fop%2Funiversal.t;h=b7d452fc5a643d7facc8ae9946dfeec2505f5139;hb=e24631be6ac297b562086a055de17c5bd4247797;hp=3e075cff43caa38ef5a38feecb55090e61abbeed;hpb=44a8e56aa037ed0f03f0506f6f85f5ed290c78e1;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/t/op/universal.t b/t/op/universal.t
index 3e075cf..b7d452f 100755
--- a/t/op/universal.t
+++ b/t/op/universal.t
@@ -3,36 +3,201 @@
 # check UNIVERSAL
 #
 
-print "1..4\n";
+BEGIN {
+    chdir 't' if -d 't';
+    @INC = '../lib';
+    $| = 1;
+}
 
-# explicit bless
+print "1..101\n";
 
 $a = {};
 bless $a, "Bob";
-if ($a->class eq "Bob") {print "ok 1\n";} else {print "not ok 1\n";}
+print "not " unless $a->isa("Bob");
+print "ok 1\n";
 
-# bless through a package
+package Human;
+sub eat {}
 
-package Fred;
+package Female;
+@ISA=qw(Human);
 
-$b = {};
-bless $b;
-if ($b->class eq "Fred") {print "ok 2\n";} else {print "not ok 2\n";}
+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;
 
-# same as test 1 and 2, but with other object syntax
+{ my $i = 2;
+  sub test {
+      print "not " unless $_[0];
+      print "ok ", $i++;
+      print " # at ", (caller)[1], ", line ", (caller)[2] unless $_[0];
+      print "\n";
+  }
+}
 
-# explicit bless
+$a = new Alice;
 
-$a = {};
-bless $a, "Bob";
-if (class $a eq "Bob") {print "ok 3\n";} else {print "not ok 3\n";}
+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("Human");
+
+test ! $a->isa("Male");
+
+test ! $a->isa('Programmer');
+
+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 (Cedric->isa('Human'));
+
+push(@Cedric::ISA,'Programmer');
+
+test (Cedric->isa('Programmer'));
+
+{
+    package Alice;
+    base::->import('Programmer');
+}
+
+test $a->isa('Programmer');
+test $a->isa("Female");
+
+@Cedric::ISA = qw(Bob);
+
+test (!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; $q++) {
+        test UNIVERSAL::isa($vals[$p], $refs[$q]) eq ($p==$q or $p+$q==1);
+    };
+};
+
+test ! UNIVERSAL::can(23, "can");
+
+test $a->can("VERSION");
+
+test $a->can("can");
+test ! $a->can("export_tags");	# a method in Exporter
+
+test (eval { $a->VERSION }) == 2.718;
+
+test ! (eval { $a->VERSION(2.719) }) &&
+         $@ =~ /^Alice version 2.719 \(2\.719\.0\) required--this is only version 2.718 \(2\.718\.0\) at /;
+
+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 import isa VERSION";
+} else {
+    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->isa("UNIVERSAL");
+
+my $sub2 = join ' ', sort grep { defined &{"UNIVERSAL::$_"} } keys %UNIVERSAL::;
+# XXX import being here is really a bug
+if ('a' lt 'A') {
+    test $sub2 eq "can import isa VERSION";
+} else {
+    test $sub2 eq "VERSION can import isa";
+}
+
+eval 'sub UNIVERSAL::sleep {}';
+test $a->can("sleep");
+
+test ! UNIVERSAL::can($b, "can");
+
+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" ;
+}
+
+{
+    # test isa() and can() on magic variables
+    "Human" =~ /(.*)/;
+    test $1->isa("Human");
+    test $1->can("eat");
+    package HumanTie;
+    sub TIESCALAR { bless {} }
+    sub FETCH { "Human" }
+    tie my($x), "HumanTie";
+    ::test $x->isa("Human");
+    ::test $x->can("eat");
+}
+
+# bugid 3284
+# a second call to isa('UNIVERSAL') when @ISA is null failed due to caching
 
-# bless through a package
+@X::ISA=();
+my $x = {}; bless $x, 'X';
+test $x->isa('UNIVERSAL');
+test $x->isa('UNIVERSAL');
 
-package Fred;
 
-$b = {};
-bless $b;
-if (class $b eq "Fred") {print "ok 4\n";} else {print "not ok 4\n";}
+# Check that the "historical accident" of UNIVERSAL having an import()
+# method doesn't effect anyone else.
+eval { Some::Package->import("bar") };
+test !$@;