NSubstitute vs PRISM EventAggregator: Assert that calling a method triggers event with correct payload

Question

Consider the below method that updates a person and publishes an event through the PRISM EventAggregator to indicate that the person has been updated.

I would like t

Answer 1

Just add a subscriber to your unit test and check the result of the delegate. See Prism's IEventAggregator unit tests as an example

https://github.com/PrismLibrary/Prism/blob/master/Source/Prism.Tests/Events/PubSubEventFixture.cs#L14