class DeviseMailerPreview < ActionMailer::Preview def confirmation_instructions_for_signup user = User.new(name: 'Jane Doe', email: 'signup@example.com') DeviseMailer.confirmation_instructions(user, 'faketoken', {}) end def confirmation_instructions_for_new_email user = User.last DeviseMailer.confirmation_instructions(user, 'faketoken', {}) end end