Add Initial Test Cases to create standard / Restructure codebase for testability and good practice standards

[sandrahoang686]

Description

Create a pr to add initial test cases to help create/start a testing standard and to provide examples on how to test. Pytest will be used for unit testing. The codebase is also not structured in a way where it is easily testable, so restructure the codebase to be more modular like for good coding and testing practices. This type of PR could easily grow in scope so cap it to just a few test cases just to get started

Acceptance Criteria

• Add initial tests for a specific feature
• Code should be more broken out
• Start conversation on if we should meet a threshold