public void AddRange(bool supportsRangeNotifications)
{
//Arrange
ClassUnderTest.SupportsRangeNotifications = supportsRangeNotifications;
var itemsToAddRange = Enumerable.Range(1, 3).Select(i => new TestViewModel(new TestModel {
Id = i
})).ToArray();
//Act
ClassUnderTest.AddRange(itemsToAddRange);
//Assert
ClassUnderTest.Should().Equal(itemsToAddRange);
ClassUnderTest.Count.Should().Be(3);
}
public void AddRange_NewItemsCollectionChangeNotification(bool supportsRangeNotifications)
{
//Arrange
ClassUnderTest.SupportsRangeNotifications = supportsRangeNotifications;
var itemsToAddRange = Enumerable.Range(1, 3).Select(i => new TestViewModel(new TestModel {
Id = i
})).ToArray();
IList addedItems = new List <TestViewModel>();
int addedItemsCount = 0;
void Handler(object sender, NotifyCollectionChangedEventArgs args)
{
if (args.Action == NotifyCollectionChangedAction.Add)
{
foreach (var newItem in args.NewItems)
{
addedItems.Add(newItem);
}
}
addedItemsCount = args.NewItems.Count;
}
ClassUnderTest.CollectionChanged += Handler;
//Act
ClassUnderTest.AddRange(itemsToAddRange);
ClassUnderTest.CollectionChanged -= Handler;
//Assert
addedItems.Count.Should().Be(itemsToAddRange.Length);
addedItemsCount.Should().Be(supportsRangeNotifications ? itemsToAddRange.Length : 1);
}
