7198904: (alt-rt) TreeMap.clone is broken

Summary: Test case for cr7198904. Issue only found in OracleJDK, but test case is valid for OpenJDK as well
Reviewed-by: mduigou, dholmes

test/java/util/TreeMap/Clone.java

+/*
+ * Copyright (c) 2012, 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 7198904
+ * @summary Verify that cloned TreeMap gets new keyset
+ * @author david.buck@oracle.com
+ * @run main/othervm Clone
+ * @run main/othervm -XX:+AggressiveOpts Clone
+ */
+
+import java.util.TreeMap;
+
+public class Clone  {
+
+    public static void main(String[] args) throws Exception {
+        TreeMap<String,Object> m1 = new TreeMap<String,Object>();
+        m1.put( "one", 1 );
+        m1.keySet();
+        TreeMap<String,Object> m2 = (TreeMap<String,Object>)m1.clone();
+        m1.put( "two", 2 );
+        m2.put( "three", 3 );
+        // iterate over the clone (m2) and we should get "one" and "three"
+        for( final String key : m2.keySet() ) {
+            if( !"one".equals( key ) && !"three".equals( key ) ) {
+                throw new IllegalStateException( "Unexpected key: " + key );
+            }
+        }
+        // iterate over the original (m1) and we should get "one" and "two"
+        for( final String key : m1.keySet() ) {
+            if( !"one".equals( key ) && !"two".equals( key ) ) {
+                throw new IllegalStateException( "Unexpected key: " + key );
+            }
+        }
+    }
+
+}