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https://issues.apache.org/jira/browse/HDFS-10891?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mingliang Liu resolved HDFS-10891.
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Resolution: Fixed
> Über-jira: Test Improvement by adding missing test cases for existing code
> --------------------------------------------------------------------------
>
> Key: HDFS-10891
> URL: https://issues.apache.org/jira/browse/HDFS-10891
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: test
> Reporter: Mingliang Liu
> Assignee: Mingliang Liu
>
> We have covered some test cases in our nightly run and we'd like to backport
> those test cases to the community code branch. This work includes the efforts
> but not limited to:
> # Add more *meaningful* test cases for existing code so it's hard to break it
> as stability and compatibility should always be guarded if possible
> # Refactor existing tests that share common code snippet (e.g. helper
> methods) and/or logic (e.g. set up a MiniDFSCluster). One approach that is
> not popular (which it should) is @Parameterized tests
> # Reduce unnecessary overhead in unit tests (e.g. long interval sleep, build
> MiniDFSCluster multiple times instead of reusing the same one). Some of the
> cases were addressed by [HDFS-10666].
> This is not a long-term work to cover all future improvement in unit tests.
> We'll be happy to resolve this after our internal test cases (will file
> separate JIRAs for that) are mostly addressed/considered.
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