--- /dev/null	2017-07-31 00:10:02.668086338 -0700
+++ new/test/jdk/java/util/Locale/bcp47u/SymbolsTests.java	2017-11-10 15:30:59.812104815 -0800
@@ -0,0 +1,91 @@
+/*
+ * 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.
+ */
+
+/*
+ *
+ * @test
+ * @bug 8176841
+ * @summary Tests *FormatSymbols class deals with Unicode extensions
+ *      correctly.
+ * @modules jdk.localedata
+ * @run testng/othervm -Djava.locale.providers=CLDR FormatTests
+ */
+
+import static org.testng.Assert.assertEquals;
+
+import java.text.DateFormatSymbols;
+import java.text.DecimalFormatSymbols;
+import java.util.Locale;
+
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+
+/**
+ * Test *FormatSymbols classes with BCP47 U extensions
+ */
+@Test
+public class SymbolsTests {
+
+    private static final Locale RG_GB = Locale.forLanguageTag("en-US-u-rg-gbzzzz");
+    private static final Locale RG_IE = Locale.forLanguageTag("en-US-u-rg-iezzzz");
+    private static final Locale RG_AT = Locale.forLanguageTag("en-US-u-rg-atzzzz");
+
+    @DataProvider(name="dateFormatSymbolsData")
+    Object[][] dateFormatSymbolsData() {
+        return new Object[][] {
+            // Locale, expected AM string, expected PM string
+
+            {RG_GB, "am", "pm"},
+            {RG_IE, "a.m.", "p.m."},
+            {Locale.US, "AM", "PM"},
+        };
+    }
+
+    @DataProvider(name="decimalFormatSymbolsData")
+    Object[][] decimalFormatSymbolsData() {
+        return new Object[][] {
+            // Locale, expected decimal separator, expected grouping separator
+
+            {RG_AT, ",", "."},
+            {Locale.US, ".", ","},
+            
+            // -nu & -rg mixed. -nu should win
+            {Locale.forLanguageTag("ar-EG-u-nu-latn-rg-mazzzz"), ".", ","},
+        };
+    }
+
+    @Test(dataProvider="dateFormatSymbolsData")
+    public void test_DateFormatSymbols(Locale locale, String amExpected, String pmExpected) {
+        DateFormatSymbols dfs = DateFormatSymbols.getInstance(locale);
+        String[] ampm = dfs.getAmPmStrings();
+        assertEquals(ampm[0], amExpected);
+        assertEquals(ampm[1], pmExpected);
+    }
+
+    @Test(dataProvider="decimalFormatSymbolsData")
+    public void test_DecimalFormatSymbols(Locale locale, char decimal, char grouping) {
+        DecimalFormatSymbols dfs = DecimalFormatSymbols.getInstance(locale);
+        assertEquals(dfs.getDecimalSeparator(), decimal);
+        assertEquals(dfs.getGroupingSeparator(), grouping);
+    }
+}