It isn’t what you are asking for, but I was a bit surprised/happy to discover that the Ruby AWS SDK has a good stub client implementation: https://aws.amazon.co

It isn’t what you are asking for, but I was a bit surprised/happy to discover that the Ruby AWS SDK has a good stub client implementation: https://aws.amazon.com/blogs/developer/advanced-client-stubbing-in-the-aws-sdk-for-ruby-version-3/ https://aws.amazon.com/blogs/developer/advanced-client-stubb... I found it useful when updating some existing old ruby scripts we had. (Of course they had little to no testing before that.)