Support for Aggregated Tests

[ChrisPortman]

Description

Consider adding support for high level test aggregates/groups where the group may contain multiple regular tests, and the result of the aggregated test could be specified as "AnyOf", "AllOf" etc.

This would allow a system to pass a test that describes desired higher level functionality that could be implemented in one or more ways.

For context I've been working with Goss in relation to the Ansible Lockdown Audit repositories.

Solution Idea

Something like the following pseudo code:

AnyOf:
  package:
    nginx:
      installed: false 
  service:
      nginx:
        name: nginx
        enabled: false
        running: false

In this case, ensuring nginx is not "running" could be achieved by either not having it installed at all, or if it is installed, the service is disabled. However, specifying each of these tests individually, one of them will always fail.

Bonus if we could nest AnyOf/AllOf tests arbitrarily.