The example doesn't cover every single aspect, but the very major things.

This sample covers the following scenario: Every course has may chapters, while a chapter can belong to only one course. In the other hand every chapter has many videos while a video can belong to many chapters. I will write the description below.

This is my personal reference.

inside the testing folder add a database.php film with the following configuration:

Migrate Laravel database in Codeception

That's a nice trick

This is not how I write code on a daily basis, I brought everything to one place JUST OF THE PURPOS OF demonstrating how this stuff work. And in this example they do work:

How to add Multiple pagination in one page

Using Sentry With Eloquent