Java testing: who covers what?

Question

Is there a tool like emma that tells which test covers a specific implementation?

Answer 1

If you want to see which tests cover which line of code, you can use Clover which shows you:

• how many times has one line been covered.
• which checks the string in question

To find out what you can expect from Clover, here is a screenshot:

Answer 2

If you do not want to worry about paying / setting Cover, it’s much easier :

• remove / disable all breakpoints
• set a breakpoint on the line that you recognize when testing.
• re-run tests in debug mode
• look at the stack to find the call calling it

These methods also allow you to see how many times the line is covered, and all the tests that call it.