$| = 1;
}
-print "1..80\n";
+print "1..87\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 shift; print "ok $i\n"; $i++; }
+}
$a = new Alice;
test ! $a->isa('Programmer');
-test $a->can("drink");
-
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 $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";