public void InvoiceCreatedTest()
{
var invoiceCreated = new InvoiceCreated();
invoiceCreated.AddWatchProperty(p => p.Payment, p => p.Id);
var tracker = new Tracker <Invoice>();
Assert.AreEqual(0, tracker.GetObservers().Count);
tracker.Subscribe(invoiceCreated);
Assert.AreEqual(1, tracker.GetObservers().Count);
AssertNotificationsCreated(tracker, 0);
var invoice11 = new Invoice {
Id = 11, Cancelled = false, Payment = 1000.0
};
tracker.AddOrUpdate(new Invoice {
Id = 11, Cancelled = false, Payment = 2000.0
});
tracker.AddOrUpdate(invoice11);
AssertNotificationsCreated(tracker, 1);
Assert.AreEqual(invoice11, tracker.GetObservers().First(o => o.GetType() == typeof(InvoiceCreated)).Notifications.First().Values.First());
}