Test how arguments are passed to the data callback

diff --git a/t/13-data.t b/t/13-data.t
index 512290b127b40a47e88832fbc210b1bea1b72eb3..d1dc440200c0dd2a38cb72414ecd2ed6fac8ea9b 100644 (file)
--- a/t/13-data.t
+++ b/t/13-data.t
@@ -3,7 +3,7 @@
 use strict;
 use warnings;
 
-use Test::More tests => 32;
+use Test::More tests => 38;
 
 use Variable::Magic qw/wizard getdata cast dispell SIG_MIN/;
 
@@ -81,3 +81,20 @@ ok($res,   'cast non-data wizard returns true');
 $data = eval { getdata $a, $wiz };
 is($@, '',       'getdata from non-data wizard doesn\'t croak');
 is($data, undef, 'getdata from non-data wizard invalid returns undef');
+
+$wiz = wizard data => sub { ++$_[1] };
+my ($di, $ei) = (1, 10);
+my ($d, $e);
+cast $d, $wiz, $di;
+cast $e, $wiz, $ei;
+my $dd = getdata $d, $wiz;
+my $ed = getdata $e, $wiz;
+is($dd, 2,  'data from d is what we expected');
+is($di, 2,  'cast arguments from d were passed by alias');
+is($ed, 11, 'data from e is what we expected');
+is($ei, 11, 'cast arguments from e were passed by alias');
+$di *= 2;
+$dd = getdata $d, $wiz;
+$ed = getdata $e, $wiz;
+is($dd, 2,  'data from d wasn\'t changed');
+is($ed, 11, 'data from e wasn\'t changed');