When to use a Mocking Framework?

Question

So I am playing around with mocking frameworks (Moq) for my unit tests, and was wondering when you should use a mocking framework?

What is the benefit/disadvantage b

Answer 1

A mocking framework is useful for simulating the integration points in the code under test. I would argue that your concrete example is not a good candidate for a mocking framework as you can already inject the dependency (Person) directly into the code. Using a mocking framework actually complicates it in this case.

A much better use case is if you have a repository making a call to a database. It is desirable from a unit test perspective to mock the db call and return predetermined data instead. The key advantages of this is removing dependencies on exiting data, but also performance since the db call will slow the test down.