Surprised at the lack of tests, client or server. I'm not just talking about client view code -- there's a lot of logic in the javascript helper methods. Also

Surprised at the lack of tests, client or server. I'm not just talking about client view code -- there's a lot of logic in the javascript helper methods. Also, is there any way to run something like DynamoDB locally to run tests against? Perhaps you would need to make a separate test instance of the DynamoDB on AWS to run tests against? This would be less than ideal due to latency.