Assert the state of the version the toolbar shows: "Published", "Draft", "Unpublished" or "Archived" (the "Version" menu reads "Version #3 (Draft)").
Examples
Then the page version should be "Draft"
Then the page version should be "Published"
And the page version should not be "Published"
Then the page version should be "Unpublished"
But the page version should not be "Archived"
Pattern
Then(/^the page version should( not)* be "([^"]*)"$/, …)
Part of @webship-js/django-cms-steps (github.com/webship/django-cms-steps), a step pack for Webship-js 2.0.x.