--- /dev/null	2017-07-31 00:10:02.668086338 -0700
+++ new/test/jdk/java/util/Locale/bcp47u/spi/provider/foo/LocaleNameProviderImpl.java	2017-11-10 15:31:03.593175491 -0800
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2017, 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.
+ */
+
+package foo;
+
+import java.util.Locale;
+import java.util.spi.LocaleNameProvider;
+
+/*
+ * Implements LocaleNameProvider SPI, augmenting the default
+ * values for Unicode Locale Extension key/type names.
+ */
+public class LocaleNameProviderImpl extends LocaleNameProvider {
+    private static final Locale[] avail = {new Locale("foo")};
+
+    @Override
+    public Locale[] getAvailableLocales() {
+        return avail;
+    }
+
+    @Override
+    public String getDisplayLanguage(String lang, Locale target) {
+        return null;
+    }
+
+    @Override
+    public String getDisplayCountry(String ctry, Locale target) {
+        return null;
+    }
+
+    @Override
+    public String getDisplayVariant(String vrnt, Locale target) {
+        return null;
+    }
+
+    @Override
+    public String getDisplayUnicodeExtensionKey(String key, Locale target) {
+        return "foo_" + key;
+    }
+
+    @Override
+    public String getDisplayUnicodeExtensionType(String extType, String key, Locale target) {
+        return "foo_" + key + ":foo_" + extType;
+    }
+}