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https://issues.apache.org/jira/browse/HADOOP-13793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15634713#comment-15634713
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Mingliang Liu commented on HADOOP-13793:
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Implementing an S3Client wrapper is more feasible than implementing an S3
simulator, for the purpose of delaying request. In my prior experience, I
hacked fake-s3 (one of S3 simulators) tool for some tests; we don't want to
shadow all S3 changes by ourselves.
Mokito here may not be helpful either.
This is heavily needed for S3Guard testing I think. +1 for the proposal.
> s3guard: add inconsistency injection, integration tests
> -------------------------------------------------------
>
> Key: HADOOP-13793
> URL: https://issues.apache.org/jira/browse/HADOOP-13793
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Reporter: Aaron Fabbri
>
> Many of us share concerns that testing the consistency features of S3Guard
> will be difficult if we depend on the rare and unpredictable occurrence of
> actual inconsistency in S3 to exercise those code paths.
> I think we should have a mechanism for injecting failure to force exercising
> of the consistency codepaths in S3Guard.
> Requirements:
> - Integration tests that cause S3A to see the types of inconsistency we
> address with S3Guard.
> - These are deterministic integration tests.
> Unit tests are possible as well, if we were to stub out the S3Client. That
> may be less bang for the buck, though.
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