public void ObservableSelect_AddItemsTest() { var collection = new ObservableCollection<TestObject>(); var values = collection.ObservableSelect(item => item.Value); var receivedEvents = new ObservableIndexer<NotifyCollectionChangedAction, int>(_ => 0); var expectedValues = new[] { 1, 2, 3 }; var expectedEvents = new[] { KeyValuePair(NotifyCollectionChangedAction.Add, 3) }; var testObject1 = new TestObject { Value = 1 }; var testObject2 = new TestObject { Value = 2 }; var testObject3 = new TestObject { Value = 3 }; NotifyCollectionChangedEventHandler collectionChangedEventHandler = (sender, e) => { receivedEvents[e.Action] += 1; }; values.CollectionChanged += collectionChangedEventHandler; collection.AddRange(testObject1, testObject2, testObject3); Assert.IsTrue(receivedEvents.SequenceEqual(expectedEvents)); Assert.IsTrue(values.SequenceEqual(expectedValues)); }
public void ObservableSelectMany_ChangeItemValuesTest() { var collection = new ObservableCollection<TestObject>(); var values = collection.ObservableSelectMany(item => item.Inner); var receivedEvents = new ObservableIndexer<NotifyCollectionChangedAction, int>(_ => 0); var expectedInitialValues = new[] { 1, 2, 3, 1, 2, 3, 1, 2, 3 }; var expectedValues = new[] { 2, 3, 4, 5, 6, 7, 8, 9, 10 }; var expectedEvents = new[] { KeyValuePair(NotifyCollectionChangedAction.Replace, 9) }; var testObject1 = new TestObject { Inner = new ObservableCollection<int>(new[] { 1, 2, 3 }) }; var testObject2 = new TestObject { Inner = new ObservableCollection<int>(new[] { 1, 2, 3 }) }; var testObject3 = new TestObject { Inner = new ObservableCollection<int>(new[] { 1, 2, 3 }) }; NotifyCollectionChangedEventHandler collectionChangedEventHandler = (sender, e) => { receivedEvents[e.Action] += 1; }; collection.AddRange(testObject1, testObject2, testObject3); Assert.IsTrue(values.SequenceEqual(expectedInitialValues)); values.CollectionChanged += collectionChangedEventHandler; var innerValue = 1; foreach (var item in collection) { var subItems = item.Inner; for (var i = 0; i < subItems.Count; i++) { subItems[i] = ++innerValue; } } Assert.IsTrue(receivedEvents.SequenceEqual(expectedEvents)); Assert.IsTrue(values.SequenceEqual(expectedValues)); }
public void ObservableSelectMany_RemoveValuesTest() { var collection = new ObservableCollection<TestObject>(); var values = collection.ObservableSelectMany(item => item.Inner); var receivedEvents = new ObservableIndexer<NotifyCollectionChangedAction, int>(_ => 0); var expectedInitialValues = new[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 }; var expectedValues = new[] { 1, 3, 4, 6, 7, 9 }; var expectedEvents = new[] { KeyValuePair(NotifyCollectionChangedAction.Remove, 3) }; var testObject1 = new TestObject { Inner = new ObservableCollection<int>(new[] { 1, 2, 3 }) }; var testObject2 = new TestObject { Inner = new ObservableCollection<int>(new[] { 4, 5, 6 }) }; var testObject3 = new TestObject { Inner = new ObservableCollection<int>(new[] { 7, 8, 9 }) }; NotifyCollectionChangedEventHandler collectionChangedEventHandler = (sender, e) => { receivedEvents[e.Action] += 1; }; collection.AddRange(testObject1, testObject2, testObject3); Assert.IsTrue(values.SequenceEqual(expectedInitialValues)); values.CollectionChanged += collectionChangedEventHandler; foreach (var item in collection) { item.Inner.RemoveAt(1); } Assert.IsTrue(receivedEvents.SequenceEqual(expectedEvents)); Assert.IsTrue(values.SequenceEqual(expectedValues)); }
public void ObservableSelectMany_AddItemsTest() { var collection = new ObservableCollection<TestObject>(); var values = collection.ObservableSelectMany(item => item.Inner); var receivedEvents = new ObservableIndexer<NotifyCollectionChangedAction, int>(_ => 0); var expectedValues = new[] { 1, 2, 3, 1, 2, 3, 1, 2, 3 }; var expectedEvents = new[] { KeyValuePair(NotifyCollectionChangedAction.Add, 9) }; var testObject1 = new TestObject { Inner = new ObservableCollection<int>() }; var testObject2 = new TestObject { Inner = new ObservableCollection<int>() }; var testObject3 = new TestObject { Inner = new ObservableCollection<int>() }; NotifyCollectionChangedEventHandler collectionChangedEventHandler = (sender, e) => { receivedEvents[e.Action] += 1; }; values.CollectionChanged += collectionChangedEventHandler; Assert.AreEqual(0, values.Count); collection.AddRange(testObject1, testObject2, testObject3); foreach (var item in collection) { item.Inner.AddRange(1, 2, 3); } Assert.IsTrue(receivedEvents.SequenceEqual(expectedEvents)); Assert.IsTrue(values.SequenceEqual(expectedValues)); }