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https://issues.apache.org/jira/browse/HADOOP-9361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HADOOP-9361:
-----------------------------------

    Status: Patch Available  (was: Open)

> 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: 2.4.0, 3.0.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Blocker
>         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-9361-016.patch, HADOOP-9361-017.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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