Update RequestMailer to use deliver_later

Deliver emails in the background job instead of doing it inline.

Author: gbp

app/mailers/request_mailer.rb

@@ -325,13 +325,13 @@ def self.alert_overdue_requests
                 overdue_alert(
                   info_request,
                   info_request.user
-                ).deliver_now
+                ).deliver_later
             elsif calculated_status == 'waiting_response_very_overdue'
               RequestMailer.
                 very_overdue_alert(
                   info_request,
                   info_request.user
-                ).deliver_now
+                ).deliver_later
             else
               raise "unknown request status"
             end
@@ -387,7 +387,7 @@ def self.alert_new_response_reminders_internal(days_since, type_code)
           new_response_reminder_alert(
             info_request,
             last_response_message
-          ).deliver_now
+          ).deliver_later
         store_sent.save!
       end
     end
@@ -434,7 +434,7 @@ def self.alert_not_clarified_request
           RequestMailer.not_clarified_alert(
             info_request,
             last_response_message
-          ).deliver_now
+          ).deliver_later
         end
         store_sent.save!
       end
@@ -508,12 +508,12 @@ def self.alert_comment_on_request
             info_request,
             count,
             earliest_unalerted_comment_event.comment
-          ).deliver_now
+          ).deliver_later
         elsif count == 1
           RequestMailer.comment_on_alert(
             info_request,
             last_comment_event.comment
-          ).deliver_now
+          ).deliver_later
         else
           raise "internal error"
         end

app/models/comment.rb

@@ -158,7 +158,7 @@ def report!(reason, message, user)
                 "comment: #{comment_url(self)} " \
                 "\nadmin: #{edit_admin_comment_url(self)}"
 
-      RequestMailer.requires_admin(info_request, user, message).deliver_now
+      RequestMailer.requires_admin(info_request, user, message).deliver_later
 
       info_request.log_event(
         'report_comment',

app/models/info_request.rb

@@ -951,7 +951,7 @@ def receive(email, raw_email_data, *args)
             )
             user.notify(info_request_event)
           else
-            RequestMailer.new_response(self, incoming_message).deliver_now
+            RequestMailer.new_response(self, incoming_message).deliver_later
           end
         end
       end
@@ -1022,13 +1022,13 @@ def set_described_state(new_state, set_by = nil, message = "")
     if old_described_state != described_state && requires_admin?
       # Check there is someone to send the message "from"
       if set_by && user
-        RequestMailer.requires_admin(self, set_by, message).deliver_now
+        RequestMailer.requires_admin(self, set_by, message).deliver_later
       end
     end
 
     unless set_by.nil? || is_actual_owning_user?(set_by) || described_state == 'attention_requested'
       RequestMailer.
-        old_unclassified_updated(self).deliver_now unless is_external?
+        old_unclassified_updated(self).deliver_later unless is_external?
     end
   end
 

spec/controllers/classifications_controller_spec.rb

@@ -196,7 +196,7 @@ def post_status(status, message: nil)
         it 'should send an email to the requester letting them know someone has
             updated the status of their request' do
           mail_mock = double('mail')
-          allow(mail_mock).to receive :deliver_now
+          allow(mail_mock).to receive :deliver_later
           expect(RequestMailer).to receive(:old_unclassified_updated).
             and_return(mail_mock)
           post_status('rejected')

spec/support/email_helpers.rb

@@ -82,6 +82,7 @@ def rebuild_raw_emails(info_request)
 end
 
 def deliveries
+  perform_enqueued_jobs
   @deliveries ||= []
   @deliveries += ActionMailer::Base.deliveries
   ActionMailer::Base.deliveries.clear