public void UnRegisterTest1()
{
Mediator.Mediator target = Mediator.Mediator.Instance;
MockObject m = new MockObject();
Assert.AreEqual(true, target.IsRegistered(m));
target.NotifyColleagues(1, 5);
Assert.AreEqual(5, m.Index);
target.UnRegister(m._Action);
target.NotifyColleagues(1, 10);
Assert.AreEqual(5, m.Index);
}
