Assert the administration index offers (or does not offer) a section to the current user: "Users", "Groups", "Page contents", "Aliases". Django lists the models the user may view or change. The step opens the administration index, so the page changes.
Examples
Then the administration should offer "Page contents"
Then the administration should not offer "Users"
And the administration should not offer "Groups"
Then the administration should offer "Aliases"
But the administration should not offer "Sites"
Pattern
Then(/^the administration should( not)* offer "([^"]*)"$/, …)
Part of @webship-js/django-cms-steps (github.com/webship/django-cms-steps), a step pack for Webship-js 2.0.x.