Spring Data Elasticsearch - How to test?

I have a Spring Boot App with Elasticsearch integration and want to test it with Integration- and Seleniumtests .... now I am pretty much overstrained when it comes to testing with elasticsearch...

I do not understand much about their documentation.. Can someone give me an example how I can test for example if a repository method response with the correct set of hits?

And the tests have to run on a jenkins ci server.