public void CollectionPopulated_SetsChangeTypeAndNewItemsAndChangedPathToCollection()
{
var collection = VMCollectionStub
.WithItems(ViewModelStub.Build())
.Build();
var newItems = collection.ToArray();
var oldItems = new[] { ViewModelStub.Build(), ViewModelStub.Build() };
var args = ChangeArgs.CollectionPopulated(collection, oldItems);
Assert.AreEqual(ChangeType.CollectionPopulated, args.ChangeType);
CollectionAssert.AreEqual(newItems, args.NewItems.ToArray());
CollectionAssert.AreEqual(oldItems, args.OldItems.ToArray());
DomainAssert.AreEqual(Path.Empty.Append(collection), args.ChangedPath);
}
public void ReplaceItems_CallsNotifyChangeForOldAndNewItems()
{
var oldItems = new[] {
CreateItem("Old item 1"),
CreateItem("Old item 2")
};
var newItems = new[] {
CreateItem("New item")
};
Collection = CreateCollection(newItems);
HandleCollectionPopulated(oldItems);
AssertChangeArgs(
ChangeArgs.CollectionPopulated(Collection, oldItems)
);
}
public void Refresh_OfPopulatedCollectionProperty_CallsNotifyChangeForCollectionPopulation()
{
var oldItems = new[] { new ChildVM() };
VM.PopulatedPropertyResult = oldItems;
VM.Load(x => x.PopulatedProperty);
VM.OnChangeInvocations.Clear();
var newItems = new[] { new ChildVM() };
VM.PopulatedPropertyResult = newItems;
VM.Refresh(x => x.PopulatedProperty);
var expectedChangeArgs = new[] {
ChangeArgs
.CollectionPopulated(VM.PopulatedProperty, oldItems)
.PrependViewModel(VM)
};
DomainAssert.AreEqual(expectedChangeArgs, VM.OnChangeInvocations);
}
public void Refresh_OfWrapperCollectionProperty_CallsNotifyChangeForCollectionPopulation()
{
var oldItem = new ChildVM(new ChildSource());
VM.WrapperProperty.Add(oldItem);
var oldItems = VM.WrapperProperty.ToArray();
VM.OnChangeInvocations.Clear();
VM.WrapperPropertySource = new List <ChildSource> {
new ChildSource()
};
VM.Refresh(x => x.WrapperProperty);
var newItems = VM.WrapperProperty.ToArray();
var expectedChangeArgs = new[] {
ChangeArgs
.CollectionPopulated(VM.WrapperProperty, new[] { oldItem })
.PrependViewModel(VM)
};
DomainAssert.AreEqual(expectedChangeArgs, VM.OnChangeInvocations);
}
