public void Disabling_Collection_Observation_Should_Suppress_Event()
{
//clear existing dependency and let the garbage collector take care of it
//(works thanks to weak event listeners). If we didn't change listener remained active
dependency = null;
GC.Collect();
GC.WaitForPendingFinalizers();
//create settings and disable observations
DependencyNodeSettings <ObservableCollection <Student> > settings;
settings = new DependencyNodeSettings <ObservableCollection <Student> >(() => course.Students);
settings.ChangeHandler = OnDependencyChanged;
settings.ObserveSubValueChanges = false;
dependency = DependencyBuilder.CreateDependency(settings);
//add student to collection
course.Students.Add(TestUtil.CreateTestStudent());
Assert.AreEqual(0, eventCounter);
//remove student from collection
course.Students.Remove(course.Students[7]);
Assert.AreEqual(0, eventCounter);
}
public void Observing_Nullable_Types_Should_Work()
{
var basket = new { Course = c };
DependencyBuilder.CreateDependency(() => basket.Course.IsFull, OnCourseChanged);
c.IsFull = true;
c.IsFull = null;
c.IsFull = false;
c.IsFull = true;
Assert.AreEqual(4, changeCounter);
}
public void Sub_Property_Tracking_Can_Be_Disabled_Through_Settings()
{
//create settings class
var settings = new DependencyNodeSettings <IAddress>(() => Student.School.Address);
//configure settings to ignore sub item changes
settings.ObserveSubValueChanges = false;
//dispose old dependency in order to get rid of event listener!
addressDependency.Dispose();
addressDependency = DependencyBuilder.CreateDependency(settings);
//does not cause a change event:
Student.School.Address.City = "Ethon";
Assert.AreEqual(0, changeCounter);
}