@Test
public void testSetMaps() {

  final DistCpOptions.Builder builder = new DistCpOptions.Builder(
      Collections.singletonList(new Path("hdfs://localhost:8020/source")),
      new Path("hdfs://localhost:8020/target/"));
  Assert.assertEquals(DistCpConstants.DEFAULT_MAPS,
      builder.build().getMaxMaps());
  builder.maxMaps(1);
  Assert.assertEquals(1, builder.build().getMaxMaps());
  builder.maxMaps(0);
  Assert.assertEquals(1, builder.build().getMaxMaps());
}