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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9361) Strictly define the expected behavior of filesystem APIs and write tests to verify compliance
Date Tue, 17 Jun 2014 00:39:04 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14033255#comment-14033255
] 

Steve Loughran commented on HADOOP-9361:
----------------------------------------

that was a bit oddly formatted, text editor wraps vs JIRA ones.

I was trying to say in having separate tests/feature is that you can work on a feature at
a time, rather than run the subclass of FileSystemContractBaseTest you have today, which take
long enough to make a decent coffee -or, in the case of object stores, walk to a nearby cafe
and back-

> Strictly define the expected behavior of filesystem APIs and write tests to verify compliance
> ---------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9361
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9361
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs, test
>    Affects Versions: 3.0.0, 2.4.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>         Attachments: HADOOP-9361-001.patch, HADOOP-9361-002.patch, HADOOP-9361-003.patch,
HADOOP-9361-004.patch, HADOOP-9361-005.patch, HADOOP-9361-006.patch, HADOOP-9361-007.patch,
HADOOP-9361-008.patch, HADOOP-9361-009.patch, HADOOP-9361-011.patch, HADOOP-9361-012.patch,
HADOOP-9361-013.patch, HADOOP-9361-014.patch, HADOOP-9361-015.patch, HADOOP-9361.awang-addendum.patch
>
>
> {{FileSystem}} and {{FileContract}} aren't tested rigorously enough -while HDFS gets
tested downstream, other filesystems, such as blobstore bindings, don't.
> The only tests that are common are those of {{FileSystemContractTestBase}}, which HADOOP-9258
shows is incomplete.
> I propose 
> # writing more tests which clarify expected behavior
> # testing operations in the interface being in their own JUnit4 test classes, instead
of one big test suite. 
> # Having each FS declare via a properties file what behaviors they offer, such as atomic-rename,
atomic-delete, umask, immediate-consistency -test methods can downgrade to skipped test cases
if a feature is missing.



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