public void Can_union_with() { var hashSet = new ObservableHashSet <string> { "Palmer", "Carmack" }; var countChanging = 0; var countChanged = 0; var collectionChanged = 0; var currentCount = 2; var countChange = 2; var adding = new[] { "Brendan", "Nate" }; hashSet.PropertyChanging += (s, a) => AssertCountChanging(hashSet, s, a, currentCount, ref countChanging); hashSet.PropertyChanged += (s, a) => AssertCountChanged(hashSet, s, a, ref currentCount, countChange, ref countChanged); hashSet.CollectionChanged += (s, a) => { Assert.Equal(NotifyCollectionChangedAction.Replace, a.Action); Assert.Empty(a.OldItems); Assert.Equal(adding, a.NewItems.OfType <string>().OrderBy(i => i)); collectionChanged++; }; hashSet.UnionWith(new[] { "Carmack", "Nate", "Brendan" }); Assert.Equal(1, countChanging); Assert.Equal(1, countChanged); Assert.Equal(1, collectionChanged); Assert.Equal(new[] { "Brendan", "Carmack", "Nate", "Palmer" }, hashSet.OrderBy(i => i)); hashSet.UnionWith(new[] { "Brendan" }); Assert.Equal(1, countChanging); Assert.Equal(1, countChanged); Assert.Equal(1, collectionChanged); Assert.Equal(new[] { "Brendan", "Carmack", "Nate", "Palmer" }, hashSet.OrderBy(i => i)); }
public void WhenUnionWithAndOtherEqual_ThenDoesNotRaiseCountPropertyChanged() { // Arrange var target = new ObservableHashSet<int>(); target.Add(1); target.Add(2); target.Add(3); target.Add(4); var other = new int[] { 1, 2, 3, 4 }; bool wasEventRaised = false; target.PropertyChanged += (s, e) => { if (e.PropertyName == ObservableHashSet<int>.PropertyNames.Count) { wasEventRaised = true; } }; // Act target.UnionWith(other); // Assert Assert.IsFalse(wasEventRaised); }
public void WhenUnionWith_ThenRaisesCollectionChanged() { // Arrange var target = new ObservableHashSet<int>(); target.Add(1); target.Add(2); target.Add(3); target.Add(4); var other = new int[] { 1, 4, 5, 6 }; bool wasEventRaised = false; target.CollectionChanged += (s, e) => { if (e.Action == NotifyCollectionChangedAction.Add && e.NewItems.Count == 2 && e.NewItems.Contains(5) && e.NewItems.Contains(6)) { wasEventRaised = true; } }; // Act target.UnionWith(other); // Assert Assert.IsTrue(wasEventRaised); }
public void WhenUnionWithAndOtherEqual_ThenDoesNotRaiseCollectionChanged() { // Arrange var target = new ObservableHashSet<int>(); target.Add(1); target.Add(2); target.Add(3); target.Add(4); var other = new int[] { 1, 2, 3, 4 }; bool wasEventRaised = false; target.CollectionChanged += (s, e) => { if (e.Action == NotifyCollectionChangedAction.Add) { wasEventRaised = true; } }; // Act target.UnionWith(other); // Assert Assert.IsFalse(wasEventRaised); }
public void LoadXml(XElement xml) { _collection.Clear(); _collection.UnionWith(xml.Elements().Select(e => e.LoadMetadata())); }