test/java/net/InetAddress/InternalNameServiceWithNoHostsFileTest.java

/*
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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).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/* @test
 * @bug 8134577
 * @summary Test the internal NameService implementation which is enabled via
 *          the system property jdk.net.hosts.file. This property specifies
 *          a file name that contains address host mappings, similar to those in
 *          /etc/hosts file. TestHosts-II file doesn't exist, so a UHE should be
 *          thrown
 * @run main/othervm -Dsun.net.inetaddr.ttl=0  InternalNameServiceWithNoHostsFileTest
 */



import java.net.InetAddress;
import java.net.UnknownHostException;


public class InternalNameServiceWithNoHostsFileTest {
    public static void main(String args[]) throws Exception {

        String hostsFileName = System.getProperty("test.src", ".") + "/TestHosts-II";
        System.setProperty("jdk.net.hosts.file", hostsFileName);
        System.setProperty("sun.net.inetaddr.ttl", "0");
        InetAddress testAddress = null;

        try {
            testAddress = InetAddress.getByName("host.sample-domain");
            throw new RuntimeException ("UnknownHostException expected");
        } catch (UnknownHostException uhEx) {
            System.out.println("UHE caught as expected == " + uhEx.getMessage());
        }
    }
}