Use assert_equals instead of snapshots

[Chemaclass]

What type of PR is this?

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update

Description

We added bashunit here #64 using snapshot testing as example. However, for these concrete tests it make more sense (as it is also simpler to read) to use a simple assert_equals

Snapshots make sense when the output to compare is something bigger/more complex than a number. When comparing a number, snapshot testing might be good for show-case example, but it is an overkilling feature for the long living of the project.

[johnlk]

Much cleaner. Thanks 🙌🏻

[Chemaclass]

Reminder: Can we merge this? :)