As a core engineer I can see the percentage of the code being tested

We want to use Sonar to measure the total test coverage in our source code.
For that, we will use Cobertura library to instrument classes.
Once source code files are instrumented (*.ser files are generated), those files will be processed together with XML files generated by tests and exported to Sonar tool.

More information about Sonar: http://www.sonarsource.org
More information about Cobertura library: http://cobertura.sourceforge.net