Unit Testing - Is it bad form to have unit test calling other unit tests

Question

I have a unit test called TestMakeAValidCall(). It tests my phone app making a valid call.

I am about to write another test called TestShowCallMe

Answer 1

IMHO, you should do one of the following:

• Create a method that returns a valid call, and use it separately for both tests (not one calling the other)
• Mock the valid call for the ShowCallMessageTest