Assert a page tab is (or is not) the active one: the tab of the page in the browser, which the site marks with aria-current="page" and a hidden "(active tab)".
Examples
Then the "View" page tab should be active
Then the "Edit" page tab should be active
And the "Edit" page tab should not be active
Then the "Manage content" page tab should be active
And the "Manage files" page tab should not be active
Pattern
Then(/^the "([^"]*)" page tab should( not)* be active$/, …)
Part of @webship-js/backdrop-cms-steps (github.com/webship/backdrop-cms-steps), a step pack for Webship-js 2.0.x.