Assert a Views listing reported no results — the views-empty region core's views-view template renders in place of rows — or that it did return some. Every core admin listing (content, people, files, the watchdog log) is a View, so this is how you assert on an empty one without matching its site-specific "no results" wording. Both spellings of the class are matched: core's own templates use views-empty, several base themes view-empty.
Examples
Then I should see an empty listing
And we should see an empty view
Then should see an empty listing
And I should see a non-empty listing
Then we should see a non-empty view
Pattern
Then(/^(I |we )*should see (an empty|a non-?empty) (?:view|listing)$/, …)
Part of @webship-js/drupal-core-steps (github.com/webship/drupal-core-steps), a step pack for Webship-js 2.0.x.