A rate limiting guide was recently added to the Jira developer documentation. See https://developer.atlassian.com/cloud/jira/platform/rate-limiting/.
The guide indicates that rate limit testing should not be performed against the Atlassian production environment due to the potential customer impact.
Marketplace Partners, however, need a means by which they can test their handling rate limit response. Several solutions may be feasible such as providing a separate environment that will not impact customers or a library that partners can run on their own infrastructure.
Note: There is an equivalent request for Confluence: https://jira.atlassian.com/browse/CONFCLOUD-71203
This is essential in order to properly test if our rate limiting code is actually working practically and not only in theory.
I have the same concern. We would love a test environment to verify rate limits prior to publishing our app in production. +1 on this request!