Result of a test item

Hello,



I have a test made by 5 tests items.

Each of them could potentialy succeed or fail.

In an usual test, they never fail, the test send a mail to explain the result of the whole test. But i need to report in a third mail if one of the 5 tests items has failed.



So, my question is : how do i catch a test fail and execute at this moment a code (which will be a mail to explain where the test has failed) ?



Thanks for any advise,



Mehdi