Refactor tests context structure

[AliouDIAITE]

As a developer

I want to refactor tests in order to have less context part (//Given section focus on context and not test a case eg: create scd file with all requirements) and ovoid multiple then assertion in order to test only one functionality.

So that tests are less verbose and more focused.

Acceptance criteria
No assertion into //Given part
Only method to test call in //When part
//Then part focus on one functionality