Whether the settings panel offers a setting, by its label: "Tags", "Post access", "Authors", "Feature this post", "Excerpt". What it offers depends on the role of the user.
Examples
Then the post settings should offer "Tags"
Then the post settings should offer "Post access"
Then the post settings should not offer "Post access"
And the post settings should not offer "Authors"
Then the page settings should offer "Excerpt"
Pattern
Then(/^the (?:post|page) settings should( not)? offer "([^"]*)"$/, …)
Part of @webship-js/ghost-steps (github.com/webship/ghost-steps), a step pack for Webship-js 2.0.x.