combined consumer and proxy into minimal rails backed

tests/test_sending_emails.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require 'mail'
+require 'bunny'
+require 'securerandom'
+
+@default_smtp_settings = {
+      address: 'localhost',
+      port: '2025',
+      user_name: 'hello',
+      password: 'world',
+      enable_starttls_auto: true,
+      authentication: 'plain',
+      openssl_verify_mode: 'none'
+    }
+
+def send_mail(index)
+  mail = Mail.new(
+    from: "test-#{index}-#{SecureRandom.uuid}@thefactory.local",
+    to: "#{SecureRandom.uuid}@acme.local",
+    cc: "cc-#{SecureRandom.uuid}@acme.local",
+    bcc: "bcc-#{SecureRandom.uuid}@acme.local",
+    subject: "Testing #{index}",
+  )
+  mail.delivery_method :smtp, @default_smtp_settings
+  mail.deliver!
+end
+
+number_of_emails = ARGV[0] || 1
+
+send_mail number_of_emails