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http://jira.dspace.org/jira/browse/DS-532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=11474#action_11474
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Pere Villega commented on DS-532:
---------------------------------
Hi,
as this has become a GSOC project, maybe we can close this ticket?
> Testing on Dspace
> -----------------
>
> Key: DS-532
> URL: http://jira.dspace.org/jira/browse/DS-532
> Project: DSpace 1.x
> Issue Type: Improvement
> Components: DSpace API
> Affects Versions: 1.6.0
> Environment: Any
> Reporter: Pere Villega
> Priority: Minor
> Attachments: DSpace-1.6-jmeter.jmx, mvn_reports.patch, tests.patch
>
>
> Hi everybody,
> I'm writing on behalf of Enovation Solutions. After contacting Tim Donohue
> and Stuart Lewis, we did a bit of work on testing for DSpace. What I send
> you now
> is, as commented to Tim Donohue and Stuart Lewis, some scaffolding that can
> allow others to continue. I send the current files so you can validate and
> comment on them. Be aware this is a initial work, to see how feasible is to
> integrate unit testing on Dspace, detect any possible issues and provide a
> platform to start developing more cases.
> I've submitted a GSoC 2010 proposal to continue on this work in a personal
> basis, as Enovation will gladly support my efforts on this. If you find it
> interesting and useful, please consider the proposal.
> We have created 3 components for DSpace, which I list next with some comments
> on each:
> 1) JMeter
> It was mentioned by Tim Donohue and Stuart Lewis that some JMeter scripts for
> both regression and performance testing would be interesting, so we have
> created a script for that (see attached file Dspace-1.6-jmeter.jmx)
> The script includes:
> - Testing for a vanilla JSPUI dspace (deployed with no data at all)
> - Testing for a vanilla JSPUI dspace (deployed with some data)
> - Testing for OAI-PMH (deployed with some data)
> The script is properly parametrised so you can run it from command-line in a
> continuous integration environment.
> Be aware JMeter is focussed on performance testing more than regression, so
> the script does a fairly basic test by checking that the main links of DSpace
> don't return any error, and by verifying they contain expected fields and
> data. It can't manage submission of items or other similar forms in enough
> detail to
> be more useful, but should be enough for a quick validation check.
> At a later stage we will probably develop some Selenium scripts for
> functional testing on DSpace, but this is a work in progress and will take a
> while (can't give any realistic estimate on it).
> 2) Maven reports
> We have created a patch (maven_reports.patch) that adds some reporting to
> DSpace. This is important if unit testing classes will be created, as it
> gives an image of the coverage of the tests and the overall quality of the
> code. The reports integrate with the maven site and can be generated by
> running: "mvn site"
> We have included the following reports:
> 1- Cobertura: shows which % of the classes is covered by unit tests
> 2- Testability explorer: displays how testable are the classes of DSpace and
> what should be fixed
> 3- Tag list: lists all the TODO/FiXME/@todo notes in the code
> 4- Surefire: generates reports on unit tests run
> 5- PMD and CPD: checks the source code for bugs/bad practices and duplicated
> code (probably from copy-paste)
> 6- Findbugs: Locates bugs/bad practices in the code
> 7- Maven changes: links to JIRA to show the changes done to this project
> The first 4 are really important when creating unit testing, and the next two
> (5 and 6) are quite good at catching issues in the code.
> While developing this we dectected a problem with the reporting in DSpace.
> Due to the way Maven subprojects work and the hierarchy of subprojects in
> Dspace, most of these modules can't aggregate the reports, so the report will
> be created for each subproject that has some java classes instead of having
> one unique report with all data.
> There is a solution to this, which is the use of Sonar
> (http://sonar.codehaus.org/). Sonar is an open source web application that
> automatically inspects and performs some analysis on the projects, attaching
> automatically the configuration for many Maven 2 plugins (like Cobertura) to
> the projects. It can also link to JIRA and some continuous integration
> systems. You can see an example at their demo site Nemo
> (http://nemo.sonarsource.org/)
> We strongly suggest to install it as it will provide a clear image of the
> status of the unit testing efforts and will reveal issues in the code. We can
> provide help installing Sonar on any server you may have available if
> required.
> 3) Unit tests
> We have created some unit tests, using JUnit 4.7 and Mockito
> (http://mockito.org/). This is a work in progress and you will see the
> current tests are minimal, more of a proof of concept.
> The patch is in file tests.patch, and it will run the tests from both Maven
> and the IDE. You will notice some tests are giving errors, that's done in
> purpose to
> highlight some issues.
> About the unit testing effort, we have noticed by running the reports on
> point 2 that DSpace suffers from many testability issues. Many classes are
> not easily
> testable using unit tests (for example, Context). It would be advisable to
> refactor all these classes, as it will increase the quality of the DSpace
> code. The downside is that it will break compatibility with previous versions
> of the API.
> In the GSoC proposal I've commented on this issue. Refactoring of the code
> (starting with the core API and moving up to the other services) to follow
> Demeter's Law (http://en.wikipedia.org/wiki/Law_of_Demeter) should be
> feasible during the GSoC, would improve the code quality and would allow
> contributors to create more unit tests easily. It would also allow the use of
> frameworks like Guice or Spring for dependency injection, making code
> clearer and more maintainable. We could just throw extra unit tests into
> Dspace, but thinking in the long term, this is not a good idea, although if
> it's the choice of the community, it can be done with some workarounds for
> the testability issues.
> That would be everything by now. I hope you find these contributions useful.
> As was mentioned above, they are work in progress, a foundation stone that we
> will try to grow as time goes. I'm at your disposition if you want to discuss
> anything related to the contributions or unit testing.
> Best regards,
> Pere Villega
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