Could you please let me know how can custom aws resources be created..
I'm very new to Inpsec, i could use rds_instance resource but couldnt verify much as it currently verifies only if the instance with the specified identifier exists.
I wanted to check for other properties like instance_class, allocated_storage...so on.
We are currently working to rewrite all documentation on the InSpec AWS Resources. You can see current up to date documentation on a branch here, and code examples here.
As you can see the fields you requested are available for testing.