sms_safe

https://github.com/dmagliola/sms_safe

SmsSafe provides a safety net while you're developing an application that uses ActionTexter or other gems to send SMS. It keeps SMS messages from escaping into the wild. Once you've installed and configured this gem, you can rest assures that your app won't send SMS messages to external phone numbers. Instead, messages will be routed to a phone number you specify, converted into e-mails to you, or simply not sent at all. SmsSafe can also include an artificial delay to simulate the call to your SMS provider, for realistic load testing.