Github user hmcl commented on the issue:
https://github.com/apache/storm/pull/1816
@ptgoetz
The main focus of this initial patch is to design the classes in such a way
that they can accommodate arbitrary runtime environments. The default
implementation provided uses one such runtime execution library, which is more
suited to be tested using integration tests. The integration tests are already
provided through the example topology.
As for unit tests, I have filed this
[JIRA](https://issues.apache.org/jira/browse/STORM-2253) to assert for edge
cases and some common cases.
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