--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/sun/nio/cs/FindASCIIRangeCodingBugs.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2008, 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 6378295
+ * @summary Roundtrip Encoding/Decoding of ASCII chars from 0x00-0x7f
+ */
+
+import java.util.*;
+import java.nio.*;
+import java.nio.charset.*;
+
+public class FindASCIIRangeCodingBugs {
+    private static int failures = 0;
+    private static byte[] asciiBytes = new byte[0x80];
+    private static char[] asciiChars = new char[0x80];
+    private static String asciiString;
+
+    private static void check(String csn) throws Exception {
+        System.out.println(csn);
+        if (! Arrays.equals(asciiString.getBytes(csn), asciiBytes)) {
+            System.out.printf("%s -> bytes%n", csn);
+            failures++;
+        }
+        if (! new String(asciiBytes, csn).equals(asciiString)) {
+            System.out.printf("%s -> chars%n", csn);
+            failures++;
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        for (int i = 0; i < 0x80; i++) {
+            asciiBytes[i] = (byte) i;
+            asciiChars[i] = (char) i;
+        }
+        asciiString = new String(asciiChars);
+        Charset ascii = Charset.forName("ASCII");
+        for (Map.Entry<String,Charset> e
+                 : Charset.availableCharsets().entrySet()) {
+            String csn = e.getKey();
+            Charset cs = e.getValue();
+            if (!cs.contains(ascii) ||
+                csn.matches(".*2022.*") ||             //iso2022 family
+                csn.matches("x-windows-5022[0|1]") ||  //windows 2022jp
+                csn.matches(".*UTF-[16|32].*"))        //multi-bytes
+                continue;
+            if (! cs.canEncode()) continue;
+            try {
+                check(csn);
+            } catch (Throwable t) {
+                t.printStackTrace();
+                failures++;
+            }
+        }
+        if (failures > 0)
+            throw new Exception(failures + "tests failed");
+    }
+}