Do the same test as ext/standard/test/strings/strtoupper.phpt does

diff --git a/ext/mbstring/tests/casefold.phpt b/ext/mbstring/tests/casefold.phpt
index ece6e224751fee08c0a17921a321da9b46594582..21b4d01f21a396276d9ee7a6018cfd79fa951435 100644 (file)
--- a/ext/mbstring/tests/casefold.phpt
+++ b/ext/mbstring/tests/casefold.phpt
@@ -7,10 +7,14 @@ function_exists('mb_strtolower') or die("SKIP");
 --GET--
 --FILE--
 <?php
+       mb_internal_encoding( 'ISO-8859-1' );
        print mb_strtolower( "ABCDEFGHIJKLMNOPQRSTUVWXYZ\n" );
        print mb_strtoupper( mb_strtolower( "ABCDEFGHIJKLMNOPQRSTUVWXYZ\n" ) );
+       print mb_strtoupper( "äëï\n" );
 ?>
 
 --EXPECT--
 abcdefghijklmnopqrstuvwxyz
 ABCDEFGHIJKLMNOPQRSTUVWXYZ
+ÄËÏ
+