ruby-on-railsunit-testingactionmailer

Rails - How do you test ActionMailer sent a specific email in tests

Currently in my tests I do something like this to test if an email is queued to be sent 

assert_difference('ActionMailer::Base.deliveries.size', 1) do       
  get :create_from_spreedly, {:user_id => @logged_in_user.id}
end

but if i a controller action can send two different emails i.e. one to the user if sign up goes fine or a notification to admin if something went wrong - how can i test which one actually got sent. The code above would pass regardless.

Solution

  • When using the ActionMailer during tests, all mails are put in a big array called deliveries. What you basically are doing (and is sufficient mostly) is checking if emails are present in the array. But if you want to specifically check for a certain email, you have to know what is actually stored in the array. Luckily the emails themselves are stored, thus you are able to iterate through the array and check each email.

    See ActionMailer::Base to see what configuration methods are available, which you can use to determine what emails are present in the array. Some of the most suitable methods for your case probably are