@BeforeClass
  public static void setupClass() throws Exception {
    tmpFolder = folder.newFolder().getAbsolutePath();
  }
Superclass for Test[Crud|Mm]CompactorOnTez, for setup and helper classes.
itests/hive-unit/src/test/java/org/apache/hadoop/hive/ql/txn/compactor/CompactorOnTezTest.java