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https://issues.apache.org/jira/browse/HADOOP-14756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16443981#comment-16443981
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Gabor Bota edited comment on HADOOP-14756 at 4/19/18 12:27 PM:
---------------------------------------------------------------

Thanks [~fabbri]!

The things I modified in .003:
* added "for debugging and testing only" to MetadataStore#getDiagnostics javadoc
* moved the assertTrue(dirMeta.isAuthoritative()); to the end of the test - 
where it should be to test the listing of children elements. This, of course, 
broke the test for DynamoDBMetadataStore, so I've
* changed the PERSISTS_AUTHORITATIVE_BIT to false in DynamoDBMetadataStore.
* removed the assert for allowMissing() from the beginning of the test. I think 
this is a kind of check which could be easily misunderstood. The reason that I 
wanted to include this is that the javadoc for it is slightly misleading: 
"Tests assume that implementations will return recently set results", and I 
need recently set test result for my tests obviously - so I wanted to check 
that. 

(Test & verify ran on us-west-2 successfully for the patch.)



was (Author: gabor.bota):
Thanks [~fabbri]!

The things I modified in .003:
* added "for debugging and testing only" to MetadataStore#getDiagnostics javadoc
* moved the assertTrue(dirMeta.isAuthoritative()); to the end of the test - 
where it should be to test the listing of children elements. This, of course, 
broke the test for DynamoDBMetadataStore, so I've
* changed the PERSISTS_AUTHORITATIVE_BIT to false in DynamoDBMetadataStore.
* removed the assert for allowMissing() from the beginning of the test. I think 
this is check which could be easily misunderstood. The reason that I wanted to 
include this is that the javadoc for it is slightly misleading: "Tests assume 
that implementations will return recently set results", and I need recently set 
test result for my tests obviously - so I wanted to check that. 

(Test & verify ran on us-west-2 successfully for the patch.)


> S3Guard: expose capability query in MetadataStore and add tests of 
> authoritative mode
> -------------------------------------------------------------------------------------
>
>                 Key: HADOOP-14756
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14756
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.0.0-beta1
>            Reporter: Steve Loughran
>            Assignee: Gabor Bota
>            Priority: Major
>         Attachments: HADOOP-14756.001.patch, HADOOP-14756.002.patch, 
> HADOOP-14756.003.patch
>
>
> {{MetadataStoreTestBase.testListChildren}} would be improved with the ability 
> to query the features offered by the store, and the outcome of {{put()}}, so 
> probe the correctness of the authoritative mode
> # Add predicate to MetadataStore interface  
> {{supportsAuthoritativeDirectories()}} or similar
> # If #1 is true, assert that directory is fully cached after changes
> # Add "isNew" flag to MetadataStore.put(DirListingMetadata); use to verify 
> when changes are made



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