import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertThat;
import java.io.IOException;
import org.apache.hadoop.io.NullWritable;
import org.junit.Test;
public class NullWritableTest extends WritableTestBase {
@Test
public void test() throws IOException {
NullWritable writable = NullWritable.get();
assertThat(serialize(writable).length, is(0));
}
}