public void When_Source_Notify()
{
var SUT = new CollectionViewSource();
int viewChanged = 0;
SUT.RegisterPropertyChangedCallback(CollectionViewSource.ViewProperty, (s, e) => viewChanged++);
Assert.IsNull(SUT.View);
SUT.Source = new[] { 42 };
Assert.IsNotNull(SUT.View);
Assert.AreEqual(1, SUT.View.Count);
Assert.AreEqual(1, viewChanged);
}
public void When_Valid_ItemsPath()
{
var SUT = new CollectionViewSource()
{
IsSourceGrouped = true
};
SUT.ItemsPath = "MyItems";
int viewChanged = 0;
SUT.RegisterPropertyChangedCallback(CollectionViewSource.ViewProperty, (s, e) => viewChanged++);
Assert.IsNull(SUT.View);
var items = new[] {
new {
Key = 42,
MyItems = new [] {
21,
21
}
}
};
SUT.Source = items;
Assert.IsNotNull(SUT.View);
Assert.AreEqual(2, SUT.View.Count);
Assert.AreEqual(1, viewChanged);
Assert.AreEqual(1, SUT.View.CollectionGroups.Count);
var firstGroup = SUT.View.CollectionGroups.First() as ICollectionViewGroup;
Assert.AreEqual(items.First(), firstGroup.Group);
Assert.AreEqual(2, firstGroup.GroupItems.Count);
}