Test [:lower:] to [:upper:] and vice versa.

diff --git a/tests/tr/test.data.pl b/tests/tr/test.data.pl
index 39da468..1a9d0fd 100755 (executable)
--- a/tests/tr/test.data.pl
+++ b/tests/tr/test.data.pl
@@ -59,3 +59,5 @@
 ("A", "abc",    '',  'a-a','z',         "zbc",               0);
 #
 ("B", "",       '',  'a',"''",          "",                  1);
+("C", "abcxyzABCXYZ", '', '[:lower:]', '[:upper:]', "ABCXYZABCXYZ", 0);
+("D", "abcxyzABCXYZ", '', '[:upper:]', '[:lower:]', "abcxyzabcxyz", 0);