@Before
  public void setUp() throws Exception {
    zero = new SignedInt128(0);
    one = new SignedInt128(1);
    two = new SignedInt128(2);
    negativeOne = new SignedInt128(-1);
    negativeTwo = new SignedInt128(-2);
  }
Testcases for {@link SignedInt128}

This code was based on code from Microsoft PolyBase.
common/src/test/org/apache/hadoop/hive/common/type/TestSignedInt128.java