/*

 * Copyright (c) 2013, 2016, 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 SanityTest

 * @summary Sanity check of String.intern() & GC

 * @modules java.base/jdk.internal.misc

 * @library /test/lib

 * @build sun.hotspot.WhiteBox

 * @run driver ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI SanityTest

 */

import java.util.*;

import sun.hotspot.WhiteBox;

public class SanityTest {

    public static Object tmp;

    public static void main(String... args) {

        WhiteBox wb = WhiteBox.getWhiteBox();

        StringBuilder sb = new StringBuilder();

        sb.append("1234x"); sb.append("x56789");

        String str = sb.toString();

        if (wb.isInStringTable(str)) {

            throw new RuntimeException("String " + str + " is already interned");

        }

        str.intern();

        if (!wb.isInStringTable(str)) {

            throw new RuntimeException("String " + str + " is not interned");

        }

        str = sb.toString();

        wb.fullGC();

        if (wb.isInStringTable(str)) {

            throw new RuntimeException("String " + str + " is in StringTable even after GC");

        }

    }

}