@Test
  public void testNotBoolOperand() {
    // Operand | Not
    // T | F
    Assert.assertFalse(ListBucketingPrunerUtils.notBoolOperand(Boolean.TRUE));
    // F | T
    Assert.assertTrue(ListBucketingPrunerUtils.notBoolOperand(Boolean.FALSE));
    // unknown | unknown
    Assert.assertNull(ListBucketingPrunerUtils.notBoolOperand(null));
  }
Operand one|Operand another | And result
ql/src/test/org/apache/hadoop/hive/ql/optimizer/listbucketingpruner/TestListBucketingPrunner.java