map tests to product area (code)

Scenario Description:

lets say we have a big application(containing a lot of classes) and lets assume that it's devided to PA (product areas) - for example: Car , Wheels, Engine are all in Car PA.

we also have a lot of test classes and when we build our application, we conduct all of the tests automatically.

Our goal:

by given the fact that tests: X, Y, Z.. failed -> to conclude that we have a problem in our Car PA (without manually check the tests of course).

we want to map each test to product area..

i have some ideas of how it should be done.. but i wanted to ask for your opinion first.. if you familiar with some relevant material about this topic, a links would be helpful too.

Additional Info:

languages: lets talk for now of how to solve this in Java / JS.. (in Java we can use byte / source code instrumentation if it helps)