test/mailers/previews/user_mailer_preview.rb

   1 # frozen_string_literal: true
   2
   3 require "factory_bot_rails"
   4
   5 class UserMailerPreview < ActionMailer::Preview
   6   include FactoryBot::Syntax::Methods
   7
   8   # Wraps the preview in a transaction, so that no changes
   9   # are persisted to the development db
  10   def self.call(...)
  11     preview = nil
  12     ActiveRecord::Base.transaction do
  13       preview = super(...)
  14       raise ActiveRecord::Rollback
  15     end
  16     preview
  17   end
  18
  19   def diary_comment_notification
  20     recipient = create(:user, :languages => [I18n.locale])
  21     diary_entry = create(:diary_entry)
  22     diary_comment = create(:diary_comment, :diary_entry => diary_entry)
  23     UserMailer.diary_comment_notification(diary_comment, recipient)
  24   end
  25 end