public void When_registering_weak_event_then_it_should_still_be_here_when_target_referenced()
{
//// Arrange
var eventCalled = false;
var target = new MockEventTargetClass(() =>
{
eventCalled = true;
});
var obj = new MockObservableObject();
//// Act
WeakEvent.RegisterEvent<MockObservableObject, PropertyChangedEventArgs>(obj, "PropertyChanged", target.Callback);
obj.Name = "test1";
Assert.IsTrue(eventCalled);
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
eventCalled = false;
obj.Name = "test2";
//// Assert
Assert.IsTrue(eventCalled);
target.Action = null;
}
public void When_raising_property_changed_event_externally_then_event_should_be_triggered()
{
//// Arrange
var list = new List<string>();
var obj = new MockObservableObject();
obj.PropertyChanged += (sender, args) => list.Add(args.PropertyName);
//// Act
obj.RaisePropertyChanged<MockObservableObject>(i => i.Name);
//// Assert
Assert.AreEqual(1, list.Count);
Assert.IsTrue(list.Contains("Name"));
}
public void When_serializing_an_object_then_round_trip_should_work()
{
//// Arrange
var obj = new MockObservableObject();
obj.Name = "a";
//// Act
var xml = XmlSerialization.Serialize(obj);
var obj2 = XmlSerialization.Deserialize<MockObservableObject>(xml);
var xml2 = XmlSerialization.Serialize(obj2);
//// Assert
Assert.AreEqual(xml, xml2);
}
public void When_changing_property_then_event_should_be_triggered()
{
//// Arrange
var list = new List<string>();
var obj = new MockObservableObject();
obj.PropertyChanged += (sender, args) => list.Add(args.PropertyName);
//// Act
obj.Name = "A";
//// Assert
Assert.AreEqual(2, list.Count);
Assert.IsTrue(list.Contains("Name"));
Assert.IsTrue(list.Contains("FullName"));
}
public void When_changing_a_scalar_property_then_redo_should_not_work()
{
//// Arrange
var obj = new MockObservableObject();
obj.Name = "A";
var undoRedoManager = new UndoRedoManager(obj, new MockDispatcher());
Assert.IsFalse(undoRedoManager.CanRedo);
Assert.IsFalse(undoRedoManager.CanUndo);
//// Act
obj.Name = "B";
undoRedoManager.Undo();
Assert.IsTrue(undoRedoManager.CanRedo);
obj.Name = "C";
//// Assert
Assert.IsFalse(undoRedoManager.CanRedo);
}
public void When_adding_object_to_list_then_undo_should_work()
{
//// Arrange
var obj = new MockObservableObject();
obj.List.Add(new MockObservableObject());
var undoRedoManager = new UndoRedoManager(obj, new MockDispatcher());
Assert.IsFalse(undoRedoManager.CanUndo);
Assert.AreEqual(1, obj.List.Count);
//// Act
obj.List.Add(new MockObservableObject());
Assert.AreEqual(2, obj.List.Count);
Assert.IsTrue(undoRedoManager.CanUndo);
undoRedoManager.Undo();
//// Assert
Assert.AreEqual(1, obj.List.Count);
}
public void When_registering_typed_weak_event_then_it_should_still_be_here_when_target_referenced()
{
//// Arrange
var eventCalled = false;
var target = new MockEventTargetClass(() =>
{
eventCalled = true;
});
var obj = new MockObservableObject();
//// Act
WeakEvent.RegisterEvent<MockEventTargetClass, PropertyChangedEventHandler, PropertyChangedEventArgs>(
target,
h => obj.PropertyChanged += h,
h => obj.PropertyChanged -= h,
h => (o, e) => h(o, e),
(t, sender, args) => t.Callback(sender, args));
obj.Name = "test1";
Assert.IsTrue(eventCalled);
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
eventCalled = false;
obj.Name = "test2";
//// Assert
Assert.IsTrue(eventCalled);
target.Action = null;
}
public void When_changing_property_of_excluded_child_type_then_undo_should_not_work()
{
//// Arrange
var obj = new MockObservableObject();
obj.AddExcludedChildType(typeof(ObservableObject));
obj.Child = new MockObservableObject { Name = "A" };
var undoRedoManager = new UndoRedoManager(obj, new MockDispatcher());
Assert.IsFalse(undoRedoManager.CanUndo);
//// Act
obj.Child.Name = "B";
Assert.AreEqual("B", obj.Child.Name);
//// Assert
Assert.IsFalse(undoRedoManager.CanUndo);
}
public void When_changing_a_collection_then_event_should_be_triggered()
{
//// Arrange
var list = new List<PropertyChangedEventArgs>();
var child = new MockObservableObject();
var obj = new MockObservableObject();
obj.List.Add(child);
obj.GraphPropertyChanged += (sender, args) => list.Add(args);
//// Act
obj.List.Add(child);
//// Assert
Assert.AreEqual(1, list.OfType<IExtendedNotifyCollectionChangedEventArgs>().Count());
}
public void When_changing_property_in_cyclic_graph_then_event_should_occur_only_once()
{
//// Arrange
var list = new List<PropertyChangedEventArgs>();
var objA = new MockObservableObject();
objA.Name = "A";
var objB = new MockObservableObject();
objB.Name = "B";
objB.Child = objA;
objA.Child = objB;
objA.GraphPropertyChanged += (sender, args) => list.Add(args);
//// Act
objB.Name = "C";
//// Assert
Assert.AreEqual(2, list.Count);
}
public void When_changing_a_property_then_old_value_should_be_provided()
{
//// Arrange
var list = new List<PropertyChangedEventArgs>();
var obj = new MockObservableObject();
obj.Name = "A";
obj.GraphPropertyChanged += (sender, args) => list.Add(args);
//// Act
obj.Name = "B";
//// Assert
Assert.AreEqual(2, list.Count);
Assert.AreEqual("A", ((GraphPropertyChangedEventArgs)list[0]).OldValue);
Assert.AreEqual("B", ((GraphPropertyChangedEventArgs)list[0]).NewValue);
}