Preview Devise Mails

preview_devise_mail.rb

# app/test/mailers/previews/devise_mailer_preview.rb
class DeviseMailerPreview < ActionMailer::Preview
  def confirmation_instructions
    Devise::Mailer.confirmation_instructions(User.first, {})
  end

  def unlock_instructions
    Devise::Mailer.unlock_instructions(User.first, "faketoken")
  end

  def reset_password_instructions
    Devise::Mailer.reset_password_instructions(User.first, "faketoken")
  end
end