Chore: Added tests for canned_responses (#477)

spec/factories/canned_responses.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :canned_response do
+    content { 'Content' }
+    sequence(:short_code) { |n| "CODE#{n}" }
+    account
+  end
+end