public async Task Publish_Is_Not_Invoked_when_No_Publisher_Registered()
        {
            var configurationService = new Hosting.ConfigurationService(_logger, _provider);
            await configurationService.OnChange(ListRandomFiles(1));

            await _publisher.DidNotReceive().Publish(Arg.Any <string>(), Arg.Any <string>());
        }
 public async Task Service_Permits_Null_Publisher()
 {
     var configurationService = new Hosting.ConfigurationService(_logger, _provider);
     await configurationService.PublishChanges(ListRandomFiles(1));
 }