test-ctype: test islower and isupper

Test the character classifiers added by 43ccdf5 (ctype: implement
islower/isupper macro, 2012-02-10).

Signed-off-by: René Scharfe <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: rscharfe

t/helper/test-ctype.c

@@ -53,6 +53,8 @@ int cmd__ctype(int argc, const char **argv)
 	TEST_CLASS(is_regex_special, "$()*+.?[\\^{|");
 	TEST_CLASS(is_pathspec_magic, "!\"#%&',-/:;<=>@_`~");
 	TEST_CLASS(isascii, ASCII);
+	TEST_CLASS(islower, LOWER);
+	TEST_CLASS(isupper, UPPER);
 
 	return rc;
 }