This class will be the parent of all Actions to be run as part of the pre-assessment.

The class should encompass:

• A run method. This is what the Action Framework will run when the pre-assessment checks need to be performed.
• A dependency list. The actions listed in the dependency list must be run before this Action and must not have failed.
• A severity level. Tells whether a failure in this check should:
  • be a warning only
  • prevent the conversion until fixed.
  • immediately stop the conversion.
  • This has been moved into the next bullet, output of a run() because an Action may have different errors with different severities.
• A definition of how to tell if a test has succeeded, failed, or was not able to be run.
  • Success will return None.
  • Failure will raise a specific exception. The Exception will have a numeric code and a message to display to the user.describing the failure and what can be done to remediate it.
    • A base class for this exception must also be written as the Action Runner will use specific fields from the exception when informing the user about failures
  • The Action will have several instance attributes which will be set once the check has been run:
    • status:: success/failure/could not run
    • severity: The failure is always fatal, The failure can be overridden by the user. The failure is a warning to the user (for instance: repoid check (but we are going to remove it))
    • message_id: A string that uniquely identifies the error. Can be used by external tooling to identify exactly what went wrong.
    • message: a message for the user (If we need separate messages for the pre-assessment vs conversion, then we should do this by looking up the message from the message_id in a separate data structure.
  • The runner will determine if an Action was unable to be run due to its dependencies not having run.