Testing platform events
When working with platform events in Apex, there are two potential scenarios that we will need to test and validate: when we are publishing platform events and when we are consuming platform events.
Testing whether platform events are publishing
Earlier in the chapter, we defined a DemonstrationEventPublisher class as follows:
public with sharing class DemonstrationEventPublisher {
   Â
    public static void publishEventWithMessage(String message) {
        Demonstration__e demo = new Demonstration__e();
        demo.Message__c = message;
        Database.SaveResult result = Eventbus.publish(demo);
        System.debug('The publish event was a success: ' +         result.isSuccess());
   ...
