@Override
    protected void after() {
      try {
        for (IHiveTestRule p : Lists.reverse(parts)) {
          p.afterMethod(testEnvContext);
        }
      } catch (Exception e) {
        throw new RuntimeException("test-subsystem error", e);
      }
    }
Helps in setting up environments to run high level hive tests

For a sample testcase see {@link TestHiveTestEnvSetup}!
Because setting up such a complex environment is a bit more sophisticated than it should;
this class introduces some helper concepts beyond what juni4 has

<ul>
 <li>parts are decomposed into smaller {@link IHiveTestRule}
 <li>{@link HiveTestEnvContext} is visible to every methodcall</li>
 <li>invocation order of before calls are "forward"
 <li>invocation order of before calls are "backward"
 </ul>


Later this should be migrated to junit5...when it will be possible; see HIVE-18495
ql/src/test/org/apache/hive/testutils/HiveTestEnvSetup.java