Optimization Refactoring on Test Classes

[TheoGkoumas]

We currently maintain redundant code and methods that are reused on all classes with minimal (or none at some cases) differences. Thus, we need to optimize the structure of the test classes by extracting the repeated code/objects into a base class.

• create a base test class
• extract the resusable code from tests classes into the base class
• refactor the test classes to extend from parent class
• assert that the existing functionality is unaffected by the refactoring