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https://issues.apache.org/jira/browse/PIG-2692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13272936#comment-13272936
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Daniel Dai commented on PIG-2692:
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That's great, add my penny thoughts:
1. We also need methods to sort the result before compare
2. Please give some examples in document (javadoc/wiki), about how to write 
tests in different scenario
                
> Make the Pig unit faciliities more generalizable and update javadocs
> --------------------------------------------------------------------
>
>                 Key: PIG-2692
>                 URL: https://issues.apache.org/jira/browse/PIG-2692
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Jeremy Hanna
>            Priority: Minor
>
> This ticket has two goals for Pig unit:
> 1) Pig unit has a really nice method assertOutput(String inputAlias, String[] 
> inputValues, String outputAlias, String[] expectedOutputValues).  That method 
> lets you override an input alias variable with a hardcoded list of values. 
> That way, the script doesn't actually have to read that input variable from 
> hdfs or cassandra. Then, it runs the script and checks the specified output 
> alias variable against the expected set of values.  It's a really nice way to 
> test your entire pig script with a single method call, but only IF your 
> script has exactly 1 input and 1 output.  If you want to test more 
> complicated scripts, you have to jump through some hoops in order to override 
> more input variables. But, it would be fairly easy to change PigUnit so that 
> it can override any number of inputs and check any number of outputs and do 
> so easily.  That's basically the change that I put into the base testing 
> class I wrote. But, it would be better to push that into PigUnit itself, and 
> it's something that could easily be done in an afternoon.
> 2) Update javadocs for the pig unit test classes to make them more readable.

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