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POHow do I get Emma or Cobertura, with Maven, to report coverage on source code in other modules?
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copied!<p>I have a multi-module Maven setup with Java code.</p> <p>My unit tests, in one of the modules, exercise code in multiple modules. Naturally, the modules have inter-dependencies, and code in all relevant modules is compiled as needed in advance of test execution.</p> <p>So: How can I get a report on the coverage of the entire codebase?</p> <hr> <p>Note: I am not asking how to combine the results of coverage for tests in multiple modules. I am asking how to get coverage for tests in a single module using instrumented code from multiple modules. Anyone interested in the former might refer to <a href="https://stackoverflow.com/questions/1420724/cobertura-on-maven-multi-module-project">these</a> <a href="https://stackoverflow.com/questions/3459988/how-to-calculate-code-coverage-in-hudson-using-emma-for-a-multi-module-maven-proj">other</a> <a href="https://stackoverflow.com/questions/3768517/maven-cobertura-plugin-one-report-for-multimodule-project">questions</a>, and the recommendations by Crowne for <a href="http://maven.apache.org/maven-1.x/plugins/dashboard/" rel="nofollow noreferrer">Maven Dashboard</a> and <a href="http://www.sonarsource.org/" rel="nofollow noreferrer">Sonar</a>.</p> <p>I succeeded in getting a full coverage report <a href="http://cobertura.sourceforge.net/anttaskreference.html" rel="nofollow noreferrer">using pure Ant</a>. [EDIT:] I instrumented all jars from the development-runtime directory into a temporary directory; prepended the temporary directory to the classpath; then ran tests <em>from Ant</em> with <em>batch-test</em>.</p> <p>Ant can be run from Maven, but the challenge here is seamless integration (i.e., feeding all the classpath and sourcepath elements from Maven to Ant automatically), which is why I did not use Maven's facilities for this purpose.</p> <p>There are also <a href="https://stackoverflow.com/questions/2188192/running-integration-tests-with-cobertura-maven-plugin">other</a> <a href="http://www.sonatype.com/people/2009/06/integration-tests-with-maven-part-2-test-coverage-reports/" rel="nofollow noreferrer">questions</a> about integration tests. However, by default, each project's report by default only reports coverage on code in the <em>same</em> project, whereas my tests exercise code in multiple projects.</p> <p>This <a href="http://foobar.lacoctelera.net/post/2008/09/15/uso-del-plugin-cobertura-dentro-un-proyecto-multi-modulo-en" rel="nofollow noreferrer">article in Spanish</a> might be relevant. Here is another <a href="http://seamframework.org/Documentation/SeamTestCoverageWithCobertura" rel="nofollow noreferrer">Seam-specific article</a>.</p> <hr>

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