I'm looking for a test coverage tool that can show the call path/call graph of new untested code that came from a merge.
Example: I have a git repo (on github or bitbucket) and a test suite that covers X% on master, some other developer wants to contribute and do a fork and a pull request as usual, but he/she didn't included the tests (for many reasons). Then the tool show the untested call graphs that only came after the integration of this new code.