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Code Coverage by Integration Tests

To get the code coverage by integration tests on your project, you should simply follow the 5 steps below:

  1. Attach and configure a JaCoCo agent to the JVM which you will run your integration tests with. To do so, have a look at the detailed JaCoCo documentation to attach the agent: via a command line, using the JaCoCo Maven plugin or using the JaCoCo Ant task.
  2. Run your automated or manual integration tests within this JVM. At the end of the execution, JaCoCo will dump the code coverage report in the destination you set in step 1.
  3. Configure SonarQube to reuse this JaCoCo report. In your project properties file (or directly in the command line), add the sonar.jacoco.itReportPath property with the path to the JaCoCo IT coverage report as a value.
  4. Run an analysis to feed Sonar with the information provided by the JaCoCo report.
  5. Browse the results on the web interface. On a project dashboard, you can add the Integration test coverage widget:

    As usual, a drilldown is available from this widget. At the file level, you can access detailed code coverage by integration tests on the Coverage perspective:

Note: You can still use Clover or Cobertura to assess code coverage by unit tests together with JaCoCo for integration tests.

Sample projects are available on github that can be browsed or downloaded: /projects/languages/java/code-coverage/it.

Combining Code Coverage with Unit and Integration Tests

Tthe overall code coverage (combination of code coverage by unit tests and integration tests) is automatically computed. This feature is enabled when both code coverage reports (UT + IT) are generated with JaCoCo.

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If coverage by unit tests is not computed with JaCoCo, overall coverage = integration test coverage.

Sample projects are available on github that can be browsed or downloaded:

  • /projects/languages/java/code-coverage/combined ut-it/combined-ut-it-sonar-runner-jacoco
  • /projects/languages/java/code-coverage/combined ut-it/combined-ut-it-multimodule-maven-jacoco

 

See also the Measure Coverage by Integration Tests with Sonar – Updated blog post.

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