/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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/*
 * @test
 * @bug 4955833
 * @summary Make sure that there is no unexpected NPE when calling
 * getProvider() with null MacSpi object.
 * @author Valerie Peng
 */
import javax.crypto.*;
import java.security.Provider;

public class NullMacSpi {

    public static void main(String[] args) throws Exception {
        MyMac mm = new MyMac(null, null, null);
        if (mm.getProvider() == null) {
            System.out.println("Test Passed");
        }
    }
}

class MyMac extends Mac {
    public MyMac(MacSpi macSpi, Provider provider,String algorithm) {
        super(macSpi, provider, algorithm);
    }
}
