Merging Integration and Unit test reports with JaCoCo

Question

I am generating failsafe and surefire reports with maven with the JaCoCo plugin, but I can only manage to get them in separate reports. I would like to have a overall covera

Answer 1

I recently implemented this: after some headaches and a lot of testing, I have a configuration that works beautifully.

    org.jacoco
    jacoco-maven-plugin
    ${jacoco.version}
    
        
            pre-unit-test
            
                prepare-agent
            
            
                ${project.build.directory}/coverage-reports/jacoco-ut.exec
                surefireArgLine
            
        
        
            pre-integration-test
            
                prepare-agent-integration
            
            
                ${project.build.directory}/coverage-reports/jacoco-it.exec
                testArgLine
            
        
        
            post-integration-test
            post-integration-test
            
                report
            
            
                ${project.build.directory}/coverage-reports/jacoco-it.exec
                ${project.reporting.outputDirectory}/jacoco-it
            
        
        
            post-unit-test
            prepare-package
            
                report
            
            
                ${project.build.directory}/coverage-reports/jacoco-ut.exec
                ${project.reporting.outputDirectory}/jacoco-ut
            
        
        
            merge-results
            verify
            
                merge
            
            
                
                    
                        ${project.build.directory}/coverage-reports
                        
                            *.exec
                        
                    
                
                ${project.build.directory}/coverage-reports/aggregate.exec
            
        
        
            post-merge-report
            verify
            
                report
            
            
                ${project.build.directory}/coverage-reports/aggregate.exec
                ${project.reporting.outputDirectory}/jacoco-aggregate
            
        
    


    org.apache.maven.plugins
    maven-surefire-plugin
    2.18.1
    
        ${surefireArgLine}
        ${skip.unit.tests}
        
            **/*UT.java
            **/*MT.java
            **/*Test.java
        
        ${skipUTMTs}
    


    org.apache.maven.plugins
    maven-failsafe-plugin
    2.12.4
    
        ${skipTests}
        ${skipITs}
        ${testArgLine}
        
            **/*UT*.java
        
    
    
        
            
                integration-test
                verify
            
        
    

As you can see, there are 6 distinct Jacoco executions to run the tests, merge the files and create an aggregate report. On top of the Jacoco config, you also need to configure Surefire and Failsafe to take an argument from Jacoco (Surefire runs the unit tests and Failsafe runs the integration tests).

All of the configuration that I used should be there, what you do with it is your design architecture to make it fit within your desired requirements. Personally, I recommend a look into what I exclude and include within surefire and failsafe if you are having issues with files not being read.