public void GetCountOfEventRecipients_NameofEventName_WithNoSubscribers_ReturnsZero()
{
// Arrange
var stub = new EventClassStub();
// Act
var actualCount = CoClassEventReflector.GetCountOfEventRecipients(stub, typeof(EventClassStub), nameof(EventClassStub.Custom1Event));
// Assert
Assert.AreEqual(0, actualCount);
}
public void GetCountOfEventRecipients_NonExistingEventName_ThrowsArgumentException()
{
// Arrange
var stub = new EventClassStub();
// Act & Assert
var actualException = Assert.Throws <ArgumentOutOfRangeException>(
() => CoClassEventReflector.GetCountOfEventRecipients(stub, typeof(EventClassStub), "IncorrectEventName"));
Assert.AreEqual("eventName", actualException.ParamName);
Assert.AreEqual("IncorrectEventName", actualException.ActualValue);
}
public void GetCountOfEventRecipients_NameofEventName_WithMultipleSubscribers_ReturnsCorrectCount()
{
// Arrange
var stub = new EventClassStub();
stub.Custom1Event += OnCustom1EventHandler;
stub.Custom2Event += OnCustom1EventHandler;
stub.Custom2Event += OnCustom1EventHandler;
stub.Custom3Event += OnCustom1EventHandler;
stub.Custom3Event += OnCustom1EventHandler;
stub.Custom3Event += OnCustom1EventHandler;
// Act
var actualCount = CoClassEventReflector.GetCountOfEventRecipients(stub, typeof(EventClassStub), nameof(EventClassStub.Custom3Event));
// Assert
Assert.AreEqual(3, actualCount);
}