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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:
-----------------------------------
Attachment: HADOOP-9361-005.patch
This updates the tests with
# SwiftFS contract (now that HADOOP-8545 is in)
# appends contract test, with HDFS the
only tested implementation.
There's an issue with append that this test shows up (it fails), which is: what
happens if a file that is being appended to is renamed?
In HDFS, the answer appears to be "it keeps the old name", though the test
doesn't explore in detail what has happened.
> 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, 2.1.0-beta
> 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
>
>
> {{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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