public void ReturnsTrueForPropertyChangedItem()
{
var model = new TestModel();
var wrapper = new ChangeNotificationWrapper(model);
Assert.IsTrue(wrapper.SupportsNotifyPropertyChanged);
}
public void RaisesPropertyChangedEventCorrectly()
{
var model = new TestModel();
var propertyChanged = false;
model.PropertyChanged += (sender, e) =>
{
if (string.IsNullOrEmpty(e.PropertyName))
{
propertyChanged = true;
}
};
model.RaiseAllPropertiesChanged();
Assert.IsTrue(propertyChanged);
}
public void DoesNotLeakForCollectionChanged()
{
var model = new TestModel();
var collectionModel = new ObservableCollection<TestModel>(new[] {model});
var wrapper = new ChangeNotificationWrapper(collectionModel);
Assert.IsTrue(wrapper.IsObjectAlive);
collectionModel = null;
GC.Collect();
Assert.IsFalse(wrapper.IsObjectAlive);
}
public void DoesNotLeakForPropertyChanged()
{
var model = new TestModel();
var wrapper = new ChangeNotificationWrapper(model);
Assert.IsTrue(wrapper.IsObjectAlive);
model = null;
GC.Collect();
Assert.IsFalse(wrapper.IsObjectAlive);
}
public void HandlesCollectionResetsCorrectly()
{
var collection = new ObservableCollection<TestModel>();
TestModel model = null;
for (int i = 0; i < 10; i++)
{
var randomModel = new TestModel();
collection.Add(randomModel);
}
model = collection[0];
var wrapper = new ChangeNotificationWrapper(collection);
bool collectionItemPropertyChanged = false;
wrapper.CollectionItemPropertyChanged += (sender, e) => collectionItemPropertyChanged = true;
collection.Clear();
model.FirstName = "Geert";
Assert.IsFalse(collectionItemPropertyChanged);
}
public void HandlesCollectionItemPropertyChangesCorrectly()
{
var collection = new ObservableCollection<TestModel>();
var model = new TestModel();
collection.Add(model);
var wrapper = new ChangeNotificationWrapper(collection);
bool collectionItemPropertyChanged = false;
wrapper.CollectionItemPropertyChanged += (sender, e) => collectionItemPropertyChanged = true;
model.FirstName = "Geert";
Assert.IsTrue(collectionItemPropertyChanged);
}
public void HandlesCollectionChangesCorrectly()
{
var collection = new ObservableCollection<TestModel>();
var wrapper = new ChangeNotificationWrapper(collection);
bool itemsAdded = false;
bool itemsRemoved = false;
wrapper.CollectionChanged += (sender, e) =>
{
if (e.OldItems != null)
{
itemsRemoved = true;
}
if (e.NewItems != null)
{
itemsAdded = true;
}
};
var model = new TestModel();
collection.Add(model);
Assert.IsTrue(itemsAdded);
Assert.IsFalse(itemsRemoved);
collection.Remove(model);
Assert.IsTrue(itemsRemoved);
}
public void HandlesPropertyChangesCorrectly()
{
var model = new TestModel();
var wrapper = new ChangeNotificationWrapper(model);
bool propertyChanged = false;
wrapper.PropertyChanged += (sender, e) => propertyChanged = true;
model.FirstName = "Geert";
Assert.IsTrue(propertyChanged);
}
public void UnsubscribesFromCollectionItemPropertyChangedEvents()
{
var testModel = new TestModel();
var collection = new ObservableCollection<TestModel>(new[] { testModel });
var wrapper = new ChangeNotificationWrapper(collection);
wrapper.UnsubscribeFromAllEvents();
bool eventRaised = false;
wrapper.CollectionItemPropertyChanged += (sender, e) => eventRaised = true;
testModel.FirstName = "Geert";
Assert.IsFalse(eventRaised);
}
public void UnsubscribesFromPropertyChangedEvents()
{
var testModel = new TestModel();
var wrapper = new ChangeNotificationWrapper(testModel);
wrapper.UnsubscribeFromAllEvents();
bool eventRaised = false;
wrapper.PropertyChanged += (sender, e) => eventRaised = true;
testModel.FirstName = "Geert";
Assert.IsFalse(eventRaised);
}
public void DoesNotLeakForModelBaseWithPropertiesThatSupportPropertyChanged()
{
var model = new TestModel();
var weakReference = new WeakReference(model);
Assert.IsTrue(weakReference.IsAlive);
model = null;
GC.Collect();
Assert.IsFalse(weakReference.IsAlive);
}
public void HandlesCollectionChangesByResetCorrectly()
{
var collection = new FastObservableCollection<TestModel>();
var wrapper = new ChangeNotificationWrapper(collection);
var itemsReset = false;
var itemsAdded = false;
var itemsRemoved = false;
var model = new TestModel();
collection.Add(model);
wrapper.CollectionChanged += (sender, e) =>
{
if (e.OldItems != null)
{
itemsRemoved = true;
}
if (e.Action == NotifyCollectionChangedAction.Reset)
{
itemsReset = true;
}
if (e.NewItems != null)
{
itemsAdded = true;
}
};
using (collection.SuspendChangeNotifications())
{
collection.ReplaceRange(new [] { new TestModel() });
}
Assert.IsFalse(itemsAdded);
Assert.IsFalse(itemsRemoved);
Assert.IsTrue(itemsReset);
}
public void HandlesChangesOfSuspendedFastObservableCollectionCorrectly()
{
var collection = new FastObservableCollection<TestModel>();
TestModel model = null;
for (int i = 0; i < 10; i++)
{
var randomModel = new TestModel();
collection.Add(randomModel);
}
var wrapper = new ChangeNotificationWrapper(collection);
var collectionItemPropertyChanged = false;
wrapper.CollectionItemPropertyChanged += (sender, e) => collectionItemPropertyChanged = true;
var newModel = new TestModel();
using (collection.SuspendChangeNotifications())
{
collection.Clear();
collection.Add(newModel);
}
newModel.FirstName = "Geert";
Assert.IsTrue(collectionItemPropertyChanged);
}