--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/lang/String/NonCharacterMapping.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ *  @test
+ *  @bug 5101626
+ *  @summary Case conversion should not trip over non-character code points.
+ */
+
+import java.util.Locale;
+
+public class NonCharacterMapping {
+
+    private static final Locale ENGLISH = new Locale("en");
+    private static final Locale TURKISH = new Locale("tr");
+
+    public static void main(String[] args) {
+        if (Character.toLowerCase('\uFFFF') != '\uFFFF') {
+            throw new RuntimeException();
+        }
+        if (Character.toUpperCase('\uFFFF') != '\uFFFF') {
+            throw new RuntimeException();
+        }
+        if (Character.toTitleCase('\uFFFF') != '\uFFFF') {
+            throw new RuntimeException();
+        }
+        if (!"\uFFFF".toLowerCase(ENGLISH).equals("\uFFFF")) {
+            throw new RuntimeException();
+        }
+        if (!"\uFFFF".toUpperCase(ENGLISH).equals("\uFFFF")) {
+            throw new RuntimeException();
+        }
+        if (!"\uFFFF".toLowerCase(TURKISH).equals("\uFFFF")) {
+            throw new RuntimeException();
+        }
+        if (!"\uFFFF".toUpperCase(TURKISH).equals("\uFFFF")) {
+            throw new RuntimeException();
+        }
+        if (!"A\uFFFF".toLowerCase(ENGLISH).equals("a\uFFFF")) {
+            throw new RuntimeException();
+        }
+        if (!"A\uFFFF".toUpperCase(ENGLISH).equals("A\uFFFF")) {
+            throw new RuntimeException();
+        }
+        if (!"A\uFFFF".toLowerCase(TURKISH).equals("a\uFFFF")) {
+            throw new RuntimeException();
+        }
+        if (!"A\uFFFF".toUpperCase(TURKISH).equals("A\uFFFF")) {
+            throw new RuntimeException();
+        }
+        if (!"a\uFFFF".toLowerCase(ENGLISH).equals("a\uFFFF")) {
+            throw new RuntimeException();
+        }
+        if (!"a\uFFFF".toUpperCase(ENGLISH).equals("A\uFFFF")) {
+            throw new RuntimeException();
+        }
+        if (!"a\uFFFF".toLowerCase(TURKISH).equals("a\uFFFF")) {
+            throw new RuntimeException();
+        }
+        if (!"a\uFFFF".toUpperCase(TURKISH).equals("A\uFFFF")) {
+            throw new RuntimeException();
+        }
+    }
+}