Test that lc, uc, etc on undef return ""

p4raw-id: //depot/perl@33087

1 files changed, 6 insertions, 1 deletions

diff --git a/t/op/lc.t b/t/op/lc.t
index 1cef380417..4bfefb7b68 100644
--- a/t/op/lc.t
+++ b/t/op/lc.t
@@ -6,7 +6,12 @@ BEGIN {
     require './test.pl';
 }
 
-plan tests => 88;
+plan tests => 92;
+
+is(lc(undef),	   "", "lc(undef) is ''");
+is(lcfirst(undef), "", "lcfirst(undef) is ''");
+is(uc(undef),	   "", "uc(undef) is ''");
+is(ucfirst(undef), "", "ucfirst(undef) is ''");
 
 $a = "HELLO.* world";
 $b = "hello.* WORLD";