@Test
  public void testUnsignedInt128IntIntIntInt() {
    assertEquals(((long) 11) << 32L | 23L,
        new UnsignedInt128(23, 11, 0, 0).asLong());
  }
Testcases for {@link UnsignedInt128}

This code was based on code from Microsoft's PolyBase.
common/src/test/org/apache/hadoop/hive/common/type/TestUnsignedInt128.java