'How to unit test void methods whos result is calling a webclient?

Assuming I've something like this:

public void sendNotification(String uuid) {
   List<MyData> dataList = myDataRepository.findAllById(uuid);
   NotificationDto dto = new NotificationDto();
   for (MyData data : dataList) {
     // transform and append to dto
   }

   webclient.send(dto);
}

How can I unit test that given myDataRepository returns a list of xyz the right content is sent? Is the only way to extract the dto creation in a public method just for unit test purposes?

javaspring-boot


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