--- /dev/null	2015-07-25 15:02:20.097409468 -0700
+++ new/test/java/lang/String/CompactString/ToLowerCase.java	2015-10-30 14:04:21.062193251 -0700
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+
+import static org.testng.Assert.assertEquals;
+
+
+/*
+ * @test
+ * @bug 8077559
+ * @summary Tests Compact String. This one is for String.toLowerCase.
+ * @run testng/othervm -XX:+CompactStrings ToLowerCase
+ * @run testng/othervm -XX:-CompactStrings ToLowerCase
+ */
+
+public class ToLowerCase extends CompactString {
+
+    @DataProvider
+    public Object[][] provider() {
+        return new Object[][] {
+                new Object[] { STRING_EMPTY, "" },
+                new Object[] { STRING_L1, "a" },
+                new Object[] { STRING_L2, "ab" },
+                new Object[] { STRING_U1, "\uFF41" },
+                new Object[] { STRING_MDUPLICATE1,
+                        "\uFF41a\uFF41a\uFF41a\uFF41a\uFF41a" },
+                new Object[] { STRING_SUPPLEMENTARY,
+                        "\uD801\uDC28\uD801\uDC29\uFF41a" },
+                new Object[] { STRING_SUPPLEMENTARY_LOWERCASE,
+                        "\uD801\uDC28\uD801\uDC29\uFF41a" },
+                new Object[] { STRING_SUPPLEMENTARY,
+                        STRING_SUPPLEMENTARY_LOWERCASE } };
+    }
+
+    @Test(dataProvider = "provider")
+    public void testToLowerCase(String str, String expected) {
+        map.get(str).forEach(
+                (source, data) -> {
+                    assertEquals(data.toLowerCase(), expected, String.format(
+                            "testing String(%s).toLowerCase(), source : %s, ",
+                            escapeNonASCIIs(data), source));
+                });
+    }
+}