+#!perl -T
+
+use Test::More tests => 24;
+
+use Variable::Magic qw/wizard getsig cast dispell SIG_MIN/;
+
+my $sig = 300;
+
+my ($a, $b, $c, $d) = 1 .. 4;
+
+{
+ my $wiz = eval { wizard sig => $sig };
+ ok(!$@, "wizard creation error ($@)");
+ ok(defined $wiz, 'wizard is defined');
+ ok(ref $wiz eq 'SCALAR', 'wizard is a scalar ref');
+ ok($sig == getsig $wiz, 'wizard signature is correct');
+
+ my $wiz2 = eval { wizard sig => $sig };
+ ok(!$@, "wizard retrieve error ($@)");
+ ok(defined $wiz2, 'retrieved wizard is defined');
+ ok(ref $wiz2 eq 'SCALAR', 'retrieved wizard is a scalar ref');
+ ok($sig == getsig $wiz2, 'retrieved wizard signature is correct');
+
+ my $a = 1;
+ my $res = eval { cast $a, $wiz };
+ ok(!$@, "cast from wizard croaks ($@)");
+ ok($res, 'cast from wizard invalid');
+
+ $res = eval { dispell $a, $wiz2 };
+ ok(!$@, "dispell from retrieved wizard croaks ($@)");
+ ok($res, 'dispell from retrieved wizard invalid');
+
+ $res = eval { cast $b, $sig };
+ ok(!$@, "cast from integer croaks ($@)");
+ ok($res, 'cast from integer invalid');
+}
+
+my $res = eval { cast $c, $sig + 0.1 };
+ok(!$@, "cast from float croaks ($@)");
+ok($res, 'cast from float invalid');
+
+$res = eval { cast $d, sprintf "%u", $sig };
+ok(!$@, "cast from string croaks ($@)");
+ok($res, 'cast from string invalid');
+
+$res = eval { dispell $b, $sig };
+ok(!$@, "dispell from integer croaks ($@)");
+ok($res, 'dispell from integer invalid');
+
+$res = eval { dispell $c, $sig + 0.1 };
+ok(!$@, "dispell from float croaks ($@)");
+ok($res, 'dispell from float invalid');
+
+$res = eval { dispell $d, sprintf "%u", $sig };
+ok(!$@, "dispell from string croaks ($@)");
+ok($res, 'dispell from string invalid');
+