public void FireAdditionalPropertyChangedProperly()
{
var eventAFired = false;
var eventBFired = false;
var vm = new TestObservableObject();
vm.PropertyChanged += (obj, e) =>
{
Assert.IsNotNull(e);
if (e.PropertyName == "A")
{
eventAFired = true;
}
};
vm.PropertyChanged += (obj, e) =>
{
Assert.IsNotNull(e);
if (e.PropertyName == "B")
{
eventBFired = true;
}
};
vm.A++;
Assert.IsTrue(eventAFired);
Assert.IsTrue(eventBFired);
}
public void AllowHookingIntoThePropertyChangedProcessing()
{
var vm = new TestObservableObject();
Assert.AreEqual(0, vm.OnPropertyChangedCallCount);
vm.A = 1;
Assert.AreEqual(2, vm.OnPropertyChangedCallCount);
}
public void NotFirePropertyChangedWhenValueSetIsTheSame()
{
var vm = new TestObservableObject();
vm.PropertyChanged += CallCounter;
Assert.AreEqual(0, _callCounter);
var value = vm.PropertyRaisingChangeNotification;
vm.PropertyRaisingChangeNotification = value;
Assert.AreEqual(0, _callCounter);
}
public void ProperlySuspendPropertyChangedEvent()
{
var vm = new TestObservableObject();
vm.PropertyChanged += CallCounter;
Assert.AreEqual(0, _callCounter);
using (vm.SuspendPropertyChangedEvent(CallCounter))
{
vm.PropertyRaisingChangeNotification++;
Assert.AreEqual(0, _callCounter);
}
vm.PropertyRaisingChangeNotification++;
Assert.AreEqual(1, _callCounter);
}
public void FirePropertyChangeNotificationWhenUsingSetWithTwoParameters()
{
var eventFired = false;
var vm = new TestObservableObject();
vm.PropertyChanged += (obj, e) =>
{
Assert.IsNotNull(e);
Assert.AreEqual("SetWith2Parameters", e.PropertyName);
eventFired = true;
};
Assert.AreNotEqual(13, vm.PropertyRaisingChangeNotification);
vm.SetWith2Parameters(13);
Assert.IsTrue(eventFired);
}
public void NotCrashIfAdditionalPropertiesChangedIsNull()
{
var vm = new TestObservableObject();
Assert.DoesNotThrow(() => vm.NullAdditionalProperties());
}