Github user bzz commented on the pull request:
https://github.com/apache/incubator-zeppelin/pull/873#issuecomment-217056217
Hi @onkarshedge thank you for submitting a fix!
In case of fixing a bug in any code, first thing to do is to try adding
some kind of (unit-)test to the existing project test suite in order to
reproduce the bug. And then implement the fix and make sure the tests pass.
This way we are building a "safe-net", so other people can be sure that
this particular bug does not happen again, later on.
Good place to add a test that reproduces this bug would be in
[ZeppelinConfigurationTest.java](https://github.com/apache/incubator-zeppelin/blob/master/zeppelin-zengine/src/test/java/org/apache/zeppelin/conf/ZeppelinConfigurationTest.java)
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