Whether the front end offers to subscribe: a visible button or link that opens the sign up form (data-portal="signup").
Examples
Then I should see a subscribe button
Then I should not see a subscribe button
Then we should see a subscribe button
And I should see a subscribe button
And we should not see a subscribe button
Pattern
Then(/^(?:I |we )?should( not)? see a subscribe button$/, …)
Part of @webship-js/ghost-steps (github.com/webship/ghost-steps), a step pack for Webship-js 2.0.x.