public void NotifyCollectionChangedEventArgsConstructor2Test() { /* Expected Behavior: * * If action is Add, success. * If action is Remove, success. * If action is Reset: * If changedItems is null, success. * If changedItems is non-null, throw an Argument Exception * If action is Move or Replace, throw an Argument Exception */ IList changedItems = new List <object>(); // Trying with Add var args = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, changedItems); CollectionChangedEventValidators.ValidateAddOperation(args, changedItems, "#B01"); // Trying to add a null array try { GC.KeepAlive(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, null)); Assert.Fail("Cannot call .ctor if changedItems is null."); } catch (ArgumentNullException ex) { No.Op(ex); } // Trying with Remove args = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, changedItems); CollectionChangedEventValidators.ValidateRemoveOperation(args, changedItems, "#B02"); // Trying with Reset (works if changedItems is null) args = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset, null); CollectionChangedEventValidators.ValidateResetOperation(args, "#B03"); try { args = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset, changedItems); GC.KeepAlive(args); Assert.Fail("Should not be able to call .ctor with NotifyCollectionChangedAction.Reset."); } catch (ArgumentException ex) { No.Op(ex); } // Trying with Move try { GC.KeepAlive(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Move, changedItems)); Assert.Fail("Should not be able to call .ctor with NotifyCollectionChangedAction.Move."); } catch (ArgumentException ex) { No.Op(ex); } // Trying with Replace try { GC.KeepAlive(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Replace, changedItems)); Assert.Fail("Should not be able to call .ctor with NotifyCollectionChangedAction.Replace."); } catch (ArgumentException ex) { No.Op(ex); } // Add some items, and repeat changedItems.Add(new object()); changedItems.Add(new object()); changedItems.Add(new object()); // Trying with Add args = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, changedItems); CollectionChangedEventValidators.ValidateAddOperation(args, changedItems, "#B04"); // Trying with Remove args = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, changedItems); CollectionChangedEventValidators.ValidateRemoveOperation(args, changedItems, "#B05"); }
public void NotifyCollectionChangedEventArgsConstructor3Test() { /* Expected Behavior: * * If action is Add, success. * If action is Remove, success. * If action is Reset: * If changedItem is null, success. * If changedItem is non-null, throw an Argument Exception * If action is Move or Replace, throw an Argument Exception */ var changedItem = new object(); // Trying with Add var args = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, changedItem); CollectionChangedEventValidators.ValidateAddOperation(args, new[] { changedItem }, "#C01"); // Trying with Remove args = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, changedItem); CollectionChangedEventValidators.ValidateRemoveOperation(args, new[] { changedItem }, "#C02"); // Trying with Reset args = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset, (object)null); CollectionChangedEventValidators.ValidateResetOperation(args, "#C03"); try { GC.KeepAlive(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset, changedItem)); Assert.Fail("Should not be able to call .ctor with NotifyCollectionChangedAction.Reset."); } catch (ArgumentException ex) { No.Op(ex); } // Trying with Move try { GC.KeepAlive(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Move, changedItem)); Assert.Fail("Should not be able to call .ctor with NotifyCollectionChangedAction.Move."); } catch (ArgumentException ex) { No.Op(ex); } // Trying with Replace try { GC.KeepAlive(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Replace, changedItem)); Assert.Fail("Should not be able to call .ctor with NotifyCollectionChangedAction.Replace."); } catch (ArgumentException ex) { No.Op(ex); } }
public void ClassTest() { // Because the collection cannot change, check to make sure exceptions are thrown for modifications. List <char> initial = new List <char> (); initial.Add('A'); initial.Add('B'); initial.Add('C'); ObservableCollection <char> collection = new ObservableCollection <char> (initial); ReadOnlyObservableCollection <char> readOnlyCollection = new ReadOnlyObservableCollection <char> (collection); // Test the events PropertyChangedEventHandler pceh = delegate(object sender, PropertyChangedEventArgs e) { Assert.Fail("No properties should change."); }; NotifyCollectionChangedEventHandler ncceh = delegate(object sender, NotifyCollectionChangedEventArgs e) { Assert.Fail("The collection should not change."); }; ((INotifyPropertyChanged)readOnlyCollection).PropertyChanged += pceh; ((INotifyCollectionChanged)readOnlyCollection).CollectionChanged += ncceh; // Done with the events. ((INotifyPropertyChanged)readOnlyCollection).PropertyChanged -= pceh; ((INotifyCollectionChanged)readOnlyCollection).CollectionChanged -= ncceh; Assert.AreEqual(3, readOnlyCollection.Count, "RO_1"); CollectionChangedEventValidators.AssertEquivalentLists(initial, readOnlyCollection, "RO_2"); // Modifying the underlying collection bool propChanged = false; pceh = delegate(object sender, PropertyChangedEventArgs e) { propChanged = true; }; ncceh = delegate(object sender, NotifyCollectionChangedEventArgs e) { CollectionChangedEventValidators.ValidateAddOperation(e, new char [] { 'I' }, 3, "RO_3"); }; ((INotifyPropertyChanged)readOnlyCollection).PropertyChanged += pceh; ((INotifyCollectionChanged)readOnlyCollection).CollectionChanged += ncceh; // In theory, this will cause the properties to change. collection.Add('I'); Assert.IsTrue(propChanged, "RO_4"); }