Two questions here,

• Can I trap RUNNING status of the paragraph in UT? I don't have an idea to make it, so I can't add UT for now.
• Would it be better to modify doc's output of the JSON format to include 'progress' field?

Thanks for the good improvement.
I think it's better add an example of the JSON output that includes 'progress' field.
Could you give me a hint that what 'UT' is?

UT = Unit test :)
I'll address the doc and let you know when complete.

@Leemoonsoo Addressed your comment.

Thanks! LGTM

If you would like to add UT in ZeppelinRestApiTest, you can add a such paragraph %sh sleep 1 instead of https://github.com/apache/incubator-zeppelin/blob/master/zeppelin-server/src/test/java/org/apache/zeppelin/rest/ZeppelinRestApiTest.java#L401 and state transition READY->PENDING->RUNNING->FINISHED will stay in RUNNING state for a second. Does it make sense ?

@Leemoonsoo
Thanks for sharing the idea! It works like a charm!
But new unit test requires ZEPPELIN-527 to be merged since API returns HTTP STATUS 500 before applying ZEPPELIN-527.

There's a bit conflict between ZEPPELIN-527 and ZEPPELIN-528 so I'll wait ZEPPELIN-527 to be merged, and upmerge & add commit regarding UT to ZEPPELIN-528.

Could you please take a look at ZEPPELIN-527 first? Thanks!

@Leemoonsoo Thanks for merging ZEPPELIN-527! Upmerged and add UT.

Great. Looks good to me.
Merge if there're no more discussions