How to get full code coverage in a Maven project with multiple modules

Imagine a multi-module Maven project, for example the following:

parent
  +- core
  +- main

maindepends on the module core.

Now I will write a class CoreClassin coreusing 2 methods: method1()and method2(). In tests, coreI write a test class that will test only CoreClass.method1().

If I run the coverage tool (in my case, Cobertura, using mvn sonar:sonar), I found that I get 50% test coverage on CoreClass(if we imagine that both methods are the same length).

So far, everything is in order.

Now, in the project main, I am writing a test class that will test CoreClass.method2(). Therefore, I usually expect 100% line coverage on CoreClasswhen I started the analysis of the entire project.

However, I still get 50% .

I understand that this is a comprehensive behavior. Indeed, Cobertura will be a tool CoreClassfor analyzing coverage only during tests in the module core, not on main. This explains why I still have 50% code coverage.

However, my question is to find out if there is a way to get real code coverage CoreClasswhen I run tests in all of my modules.

Thank!

ps: , main core. , , : o)

: Java 1.6, JUnit 4.8.1, Maven 2.0.9 ( 2.2.1, , ), Sonar 2.8