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Events

Raise events​

Use the Raise member to trigger events declared on the mocked interface or class. The generated method has the same parameters as the event delegate:

int dispensedAmount = 0;
dispenser.ChocolateDispensed += (type, amount) => dispensedAmount += amount;

dispenser.Mock.Raise.ChocolateDispensed("Dark", 3);
dispenser.Mock.Raise.ChocolateDispensed("Milk", 2);

// dispensedAmount == 5

Only the handlers that are subscribed at the time the event is raised are called. This lets you test that your code subscribes to and unsubscribes from events correctly.

React to subscriptions​

Use OnSubscribed and OnUnsubscribed to run a callback when a handler is added to or removed from an event. The callback can be parameterless or receive the handler's target and method:

dispenser.Mock.Setup.ChocolateDispensed.OnSubscribed
    .Do(() => Console.WriteLine("Someone subscribed to ChocolateDispensed"));

dispenser.Mock.Setup.ChocolateDispensed.OnUnsubscribed
    .Do((target, method) => Console.WriteLine($"{method.Name} unsubscribed"));

Verify subscriptions​

To check that your code subscribed to an event, see Verify interactions:

dispenser.Mock.Verify.ChocolateDispensed.Subscribed().Once();