test/jdk/java/net/spi/InetAddressResolverProvider/EmptyResultsStreamTest.java

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import org.testng.Assert;
import org.testng.annotations.Test;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Arrays;

/*
 * @test
 * @summary checks that InetAddress forward lookup API throw UnknownHostException
 *   when resolver returns empty address stream.
 * @library providers/empty
 * @build empty.results.provider/impl.EmptyResultsProviderImpl
 * @run testng/othervm EmptyResultsStreamTest
 */
public class EmptyResultsStreamTest {

    @Test(expectedExceptions = UnknownHostException.class)
    public void getAllByNameTest() throws UnknownHostException {
        System.err.println("getAllByName unexpectedly completed: " +
                Arrays.deepToString(InetAddress.getAllByName("test1.org")));
    }

    @Test(expectedExceptions = UnknownHostException.class)
    public void getByNameTest() throws UnknownHostException {
        System.err.println("getByName unexpectedly completed: " +
                InetAddress.getByName("test2.org"));
    }
}