We now have a SonarQube instance showing Test coverage for both unit tests and integration tests. However it doesn't aggregate coverage data across top level modules (commons, rendering, platform, enterprise, etc).

We support both Jacoco and Clover to generate test coverage reports.

To generate test coverage reports make sure you can build your module and then pick one of the following strategies below depending on what you wish to generate.

Single Maven Reactor

Using Jacoco

  • Go in the first top level module (e.g. xwiki-commons) and run: mvn clean jacoco:prepare-agent install -Djacoco.destFile=/tmp/jacoco.exec -Djacoco.append=false -Plegacy,integration-tests -Dxwiki.revapi.skip=true -Dmaven.test.failure.ignore=true
  • Go in all the other top level modules you wish to add and run: mvn clean jacoco:prepare-agent install -Djacoco.destFile=/tmp/jacoco.exec -Djacoco.append=true -Plegacy,integration-tests  -Dxwiki.revapi.skip=true -Dmaven.test.failure.ignore=true
  • Then whenever you wish to generate the full test report, run: mvn jacoco:report -Djacoco.dataFile=/tmp/jacoco.exec
    TODO
    Jacoco supports generating report from a single module, it even supports generating aggregated report from several modules using the report-aggregate mojo introduced in 0.7.7 (but note that I don't know if that includes coverage induced by module B on module A). However jacoco doesn't seem to support the ability to execute several maven reactors (for example for building code located in various github repositories), using the same jacoco exec file and then generate a report for that. See also https://groups.google.com/forum/#!topic/jacoco/odVzr7P5i6w

Using Clover

Go to the top level module containing children modules for which to generate a Clover report. Note that you won't be able to aggregate Clover data across different Maven runs with this strategy so you really need a single parent module.

  1. Run the following command (adjust the local repo path):
    mvn clean clover:setup install clover:aggregate clover:clover -Pclover,integration-tests,dev,jetty,hsqldb -Dxwiki.revapi.skip=true -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -Dmaven.test.failure.ignore=true -nsu
    • You might need to run the "install" goal instead of the "test" one if your local Maven repository doesn't already contain some test jars (apparently and for some reason Maven won't download them from the remote repository under some conditions).
    • Note that we use -Dmaven.repo.local to use a different Maven local repository so that instrumented source code and built binaries don't find their way in your standard local repository (which you could then deploy by mistake, or that'll simply fail your tests later on when you don't run with the Clover profile since instrumented artifacts require the Clover JAR to be present in the classpath at runtime...).

Multiple Maven Reactors

Using Jacoco

TODO

Using Clover

Use a single Clover database to which you add coverage information as you build modules one after another. This strategy is especially useful when you wish to manually run some modules and ensure that coverage data aggregate in a single place so that when you generate the report you have the result of all your runs.

  1. Instrument the source code with Clover for all modules that you want to include in the report, using (adjust the paths):
    mvn clover:setup install -Pclover,integration-tests,dev,jetty,hsqldb -Dmaven.clover.cloverDatabase=/Users/vmassol/.xwiki/clover/clover.db -Dxwiki.revapi.skip=true -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -nsu

    When tests are executed they'll generate coverage data in the specified Clover database. Since there's a single Clover there's no need to merge Clover databases as in strategy 1 above.

  2. To generate the Clover report, execute the following from any module (adjust path):
    mvn clover:clover -N -Dmaven.clover.cloverDatabase=/Users/vmassol/.xwiki/clover/clover.db -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -nsu
  3. Remember to clean your clover database when you're done.
If you don't wish failing tests to stop the generation of the coverage report, you should pass -Dmaven.test.failure.ignore=true on the command line.

Here are typical steps you'd follow to generate full TPC for XWiki:

  • Clean your local repo and remove any previous clover DBs:
    rm -R ~/.m2/repository-clover/org/xwiki
    rm -R ~/.m2/repository-clover/com/xpn
    rm -R ~/.xwiki/clover
  • Generate coverage data for XWiki Commons:
    cd xwiki-commons
    mvn clean -Pclover,integration-tests -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -nsu
    mvn clover:setup install -Pclover,integration-tests -Dmaven.clover.cloverDatabase=/Users/vmassol/.xwiki/clover/clover.db -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -Dmaven.test.failure.ignore=true  -Dxwiki.revapi.skip=true -nsu
  • Generate Clover report just for Commons:
    mvn clover:clover -N -Dmaven.clover.cloverDatabase=/Users/vmassol/.xwiki/clover/clover.db -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -nsu
  • Generate coverage data for XWiki Rendering:
    cd xwiki-rendering
    mvn clean -Pclover,integration-tests -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -nsu
    mvn clover:setup install -Pclover,integration-tests -Dmaven.clover.cloverDatabase=/Users/vmassol/.xwiki/clover/clover.db -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -Dmaven.test.failure.ignore=true  -Dxwiki.revapi.skip=true -nsu
  • Generate Clover report for Commons and Rendering:
    mvn clover:clover -N -Dmaven.clover.cloverDatabase=/Users/vmassol/.xwiki/clover/clover.db -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -nsu
  • Generate coverage data for XWiki Platform:
    cd xwiki-platform
    mvn clean -Pclover,integration-tests -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -nsu
    mvn clover:setup install -Pclover,integration-tests -Dmaven.clover.cloverDatabase=/Users/vmassol/.xwiki/clover/clover.db -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -Dmaven.test.failure.ignore=true  -Dxwiki.revapi.skip=true -nsu
  • Generate full Clover report (for Commons, Rendering and Platform):
    mvn clover:clover -N -Dmaven.clover.cloverDatabase=/Users/vmassol/.xwiki/clover/clover.db -Dmaven.repo.local=/Users/vmassol/.m2/repository-clover -nsu

Using Clover + Jenkins

  • Install Jenkins 2.0+ and the following plugins:
    • Pipeline plugin
    • XVnc plugin
  • Make sure to have Maven ("mvn" executable) + VNCServer ("vncserver" executable) installed on the build agent
  • Build agent must be running unix
  • Setup a Pipeline job and make it point to the following pipeline script.

Note that the Clover pipeline script will generate a report with differences from the previous passing report showing the contributions (positive and negative) of each module to the global TPC.

Example Reports

Tags:
Created by Vincent Massol on 2018/11/25 11:43
   

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