Mentioning Dependency Injection in Lesson "More Testing"

[CCeph]

I am going through the More Testing lesson currently. The first resource linked in the assignments is watching the mocking videos from the Fun Fun Function Unit Testing series. However, in these videos, dependency injection is used and it is not explained much. I was lost as this was the first time I hear of dependency injection ever. mpj does mention that he has a video on dependency injection, but I felt that I shouldn't go on a tangent. After watching tthe whole series and still being lost, I decided to watch the video on dependency injection here (https://www.youtube.com/watch?v=0X1Ns2NRfks&t=774s&ab_channel=FunFunFunction), and suddenly things started making a lot more sense.

So my suggestion is to mention dependency injection in this lesson, or include the dependency injection video as part of the assignments. I was worried that it is a tangent, but it is pretty much integral to understand for mocking. If it's mentioned in the lesson, then people would be encouraged to learn it if they feel the need to.