public void Given_Valid_Arguments_When_Multiple_Instance_Invoked_Then_Valid_Result_Asserted()
{
Callbacks callbacks = new Callbacks();
AlertMonitoringFunction func = new AlertMonitoringFunction(callbacks.CallbackFunc);
alertMonitorList.Subscribe("id", func);
SharedResources.AlertMonitorList.AlertMonitorList list = SharedResources.AlertMonitorList.AlertMonitorList.Instance;
Assert.IsFalse(list.IsEmpty());
alertMonitorList.Unsubscribe("id");
Assert.IsTrue(list.IsEmpty());
}