Assert that a slide-out editor is, or is not, open.
Examples
Then I should see a slide-out editor
Then I should not see a slide-out editor
Then we should see a slide-out editor
And I should not see a slide-out editor
And we should not see a slide-out editor
Pattern
Then(/^(I |we )*should( not)* see a slide-out editor$/, …)
Part of @webship-js/craft-cms-steps (github.com/webship/craft-cms-steps), a step pack for Webship-js 2.0.x.