jacocojacoco-maven-plugintest-reporting

How to get JaCoCo instrumentation code coverage while executing webApplication on server

I want to get a code coverage report (or tracking controller flow of an application) when I execute the some scenario on live application i.e. while application running in server, so I have refereed the official Jacoco documentation and did as fallows

As a first step, I tried to bind the jacoco agent to the application running port

export MAVEN_OPTS=-javaagent:/home/user/.m2/repository/org/jacoco/org.jacoco.agent/0.7.4.201502262128/org.jacoco.agent-0.7.4.201502262128-runtime.jar=includes=*,output=tcpserver,port=6300,address=*,dumponexit=true

then I have started the server and executed some test scenarios by that time I have also requested jacoco to get the dump by executing following command 

 mvn jacoco:dump

when I executed the above command first it showed like java.net.BindException: Address already in use then it printed as fallows 

[INFO] Connecting to localhost/127.0.0.1:6300

When I stopped the server jacoco.exec has been generated to a known location there after I have requested to generate a jacoco report by executing the following command 

mvn jacoco:report

Finally I got the report but when I open the index.html page it showed 0% coverage.

you can reproduce my difficulty with following sample Spring MVC project

please download Spring MVC project from https://github.com/mkyong/spring4-mvc-ajax-example from the Github

In my case I am using WildFly 8.x server to run the project and add the following dependencies to downloaded projects pom.xml

 maven-surefire-plugin of 2.19.1 version
 jacoco-maven-plugin of 0.7.4.201502262128 version 
 junit of 4.12 version

Then clean and build the project by using following commands.

mvn clean install

once it is done get the .war file from target folder of the project and keep inside the wildfly serverwildfly-9.0.0.CR2/standalone/deployments/ folder

Once the .war is deployed go to /wildfly-9.0.0.CR2/bin/ folder and execute/run the ./standalone.sh file or depending on platform you can run the.dat/.sh file

once project is deployed and server is started execute the following command 

mvn jacoco:dump

it displayed like listening/connected to localhost/127.0.0.1:6300

Then execute some test scenarios and execute following maven command 

mvn jaococ:report

Finally report will be generated with 0% coverage!.

Downloaded project can be found in MKyong website

Please help me to get the code coverage report and any help will be appreciated.

Solution

  • JaCoCo requires the exact same class files for report generation that were used at execution time, so

    and in either case check existence of warnings in log.

    Update for updated question

    Here is what I did: