public void ChangeTrackingModelBase_AddHandlerNullTest()
{
var person = new ChangeTrackingPerson();
try
{
person.AddHandler(null);
Assert.Fail("Excepted an ArgumentNullException");
}
catch (ArgumentNullException ex)
{
Assert.AreEqual("eventHandler", ex.ParamName);
}
}
public void ChangeTrackingModelBase_AddRemoveHandlerTest()
{
var fired = false;
var person = new ChangeTrackingPerson();
var listener = new Listener<PropertyChangedEventArgs>((sender, e) => { fired = true; });
person.ErrorsChanged += (sender, e) => { };
person.AddHandler(listener);
person.FirstName = "Tom";
Assert.IsTrue(fired);
fired = false;
person.RemoveHandler(listener);
person.FirstName = "Sam";
Assert.IsFalse(fired);
}