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 this chapter, we defined a DemonstrationEventPublisher class, as follows:

public with sharing class DemonstrationEventPublisher {
    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...