Github user zjffdu commented on the issue:
https://github.com/apache/zeppelin/pull/1462
mockit is for unit test, not for system test. It is just like
[AbstractTestRestApi](https://github.com/apache/zeppelin/blob/master/zeppelin-server/src/test/java/org/apache/zeppelin/rest/AbstractTestRestApi.java)
where we will launch real spark cluster and ZeppelinServer. Using mockit can
not cover lots of cases in real enviroment (e.g. how can I test livy handle
comment correctly (considering we are doing some preprocessing), how can I test
SparkContext is shared correctly between %livy.spark and %livy.sql) . I know
committing jars are not good practise, but these jars won't be available in
public repository in short time.
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