PR Summary

• Introduction of additional utility
  An extra capability has been brought into our system via the PMC\Unit_Test\Utility use statement.

• Added new testing procedure
  The new method test_maybe_process_waiting_list was introduced. It is designed to inspect the operation of the maybe_process_waiting_list method in the Rsvp_Setup class. This helps ensure smoother system operations by finding potential errors earlier.

• Validation for empty return values
  The new test method ensures that our system behaves correctly when dealing with a specific scenario - calling maybe_process_waiting_list with a post ID and an event ID. Specifically, it checks if the return values are empty as expected. This helps prevent unexpected behavior in this scenario.