Modern way to integration test Jira plugins?

Hello Developers,

I am working on developing a Jira plugin and we would like to test it, ideally using some sort of integration test interface provided by Atlassian. All of the resources I have found on this seem to be completely outdated and I am left wondering: what is your setup for integration testing? Are you using jira-func-tests? or something else?

Any knowledge you could share with me would be greatly appreciated!