Whether the header of the editor offers a button: "Publish", "Preview", "Update", "Unpublish" or, for a Contributor, "Save".
Examples
Then the editor should offer "Publish"
Then the editor should offer "Preview"
Then the editor should not offer "Publish"
And the editor should offer "Save"
Then the editor should offer "Unpublish"
Pattern
Then(/^the editor should( not)? offer "([^"]*)"$/, …)
Part of @webship-js/ghost-steps (github.com/webship/ghost-steps), a step pack for Webship-js 2.0.x.