public void OnItemsChangedItemAddTest()
{
var spreadsheet = new SpreadsheetView();
var privateAccessor = new PrivateAccessor(spreadsheet);
//Initialize ItemCollection
Mock.NonPublic.Arrange(spreadsheet, "OnItemsChanged", ArgExpr.IsAny<NotifyCollectionChangedEventArgs>()).DoNothing();
spreadsheet.ItemsSource = new List<TestData>();
spreadsheet.OnApplyTemplate();
Assert.IsNotNull(spreadsheet.ItemsCollection);
Mock.Reset();
//Create data item and its wrapper
var dataItem = new TestData {Text = "test", FractionalNumber = 3.5};
var itemWrap = ItemWrap.BuildNew(dataItem);
//Arrabge ManageExpandStates and BindContainerToItem
Mock.Arrange(() => spreadsheet.ManageExpandStates(Arg.IsAny<IDetailColumn>()));
Mock.NonPublic.Arrange(spreadsheet, "BindContainerToItem", ArgExpr.IsAny<SpreadsheetItemContainer>(), ArgExpr.IsAny<IWrap>());
//Make spreadsheet disposed
privateAccessor.SetField("_disposed", true);
spreadsheet.ItemsCollection.Add(itemWrap);
//Check ManageExpandStates and BindContainerToItem invocations when spreadsheet is disposed
Assert.IsTrue((bool)privateAccessor.GetField("_disposed"));
Mock.NonPublic.Assert(spreadsheet, "BindContainerToItem", Occurs.Never(), ArgExpr.IsAny<SpreadsheetItemContainer>(), ArgExpr.IsAny<IWrap>());
Mock.Assert(() => spreadsheet.ManageExpandStates(Arg.IsAny<IDetailColumn>()), Occurs.Never());
//Mock ItemContainerGenerator.ContainerFromItem method and add new item to ItemsCollection
//this invokes OnItemsChanged
privateAccessor.SetField("_disposed", false);
var container = new SpreadsheetItemContainer(spreadsheet);
Mock.Arrange(() => spreadsheet.ItemContainerGenerator.ContainerFromItem(Arg.IsAny<object>())).Returns(container);
Mock.Arrange(() => spreadsheet.ParentColumn).Returns(Mock.Create<IDetailColumn>());
spreadsheet.ItemsCollection.Add(itemWrap);
//Check ManageExpandStates and BindContainerToItem invocations when spreadsheet is not disposed
Assert.IsFalse((bool)privateAccessor.GetField("_disposed"));
Mock.NonPublic.Assert(spreadsheet, "BindContainerToItem", Occurs.Once(), container, itemWrap);
Mock.Assert(() => spreadsheet.ManageExpandStates(Arg.IsAny<IDetailColumn>()), Occurs.Once());
}
