Mocking: Add "out-of-the-box" working example of FreeRTOS and other components (IDFGH-14274)

[Fo-Zi]

Is your feature request related to a problem?

The "problem" I see is that while mocking seems to be integrated (At least for some components) on esp-idf, I haven't been able to find a working example on how to use these mocking capabilities. I have read the documentation, on both esp-idf and CMock, the problem is how to go from that, to include tests that rely on mocking to an existent project. Esp-idf uses CMake, but not in the "traditional" way I have seen in other projects, so how to do this doesn't seem trivial.

Describe the solution you'd like.

I'd like to see a working project example, like many on the examples folder of esp-idf and were of GREAT HELP. But defining tests that use mocking. FreeRTOS mocking alone would be a huge added value, since you can test through software alone task interaction logic for complex applications.

Describe alternatives you've considered.

Since I have been unable to integrate mocking natively, I have been considering on using Ceedling as a nested isolated project, and doing the mocking myself. But I am not so familiar with Ceedling so I'd need more time to achieve this.

Additional context.

No response

[ESP-Marius]

Hi, did you take a look at this part of the docs?

At the end it also links to some examples, including esp-event tests which uses mocks for the freertos calls.