[TESTS] Add Missing Unit Tests

[DavidHDev]

Description

Currently, not many of the hooks/utilities have unit tests written to cover them, I won't list them below, because it's most of them.

Feel free to open PRs for testing individual hooks/utilities.

Note

We don't really care about coverage, just ensure the tests written make sense and cover relevant scenarios for the functionality being tested.

Also, feel free to create separate issues if you want to work on testing specific functionalities, for increased visiblity.

Hints

You can find the tests directory under /lib/tests/hooks and `/lib/tests/utils'.

[Razz99]

Hi @DavidHDev

Your library helped me solve a small problem I was facing with a hook.

#130
#131
#132
#133
#134

👆 PRs are a small contribution from me to say thank you.

Cheers