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From "Marek Sapota (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-1040) use sed rather than diff for masking out noise in diff-based tests
Date Fri, 02 Dec 2011 22:49:40 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13161892#comment-13161892
] 

Marek Sapota commented on HIVE-1040:
------------------------------------

Same goes for insert_view_failure and load_view_failure.
                
> use sed rather than diff for masking out noise in diff-based tests
> ------------------------------------------------------------------
>
>                 Key: HIVE-1040
>                 URL: https://issues.apache.org/jira/browse/HIVE-1040
>             Project: Hive
>          Issue Type: Improvement
>          Components: Testing Infrastructure
>    Affects Versions: 0.4.1
>            Reporter: John Sichi
>            Assignee: Marek Sapota
>            Priority: Minor
>
> The current diff -I approach has two problems:  (1) it does not allow resolution finer
than line-level, so it's impossible to mask out pattern occurrences within a line, and (2)
it produces unmasked files, so if you run diff on the command line to compare the result .q.out
with the checked-in file, you see the noise.
> My suggestion is to first run sed to replace noise patterns with an unlikely-to-occur
string like ZYZZYZVA, and then diff the pre-masked files without using any -I.
> This would require a one-time hit to update all existing .q.out files so that they would
contain the pre-masked results.

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