private RecyclingElementFactory GetElementFactory()
{
var elementFactory = new RecyclingElementFactory();
elementFactory.RecyclePool = new RecyclePool();
elementFactory.Templates["Item"] = SharedHelpers.GetDataTemplate(@"<TextBlock Text='{Binding}' Height='100' />");
return(elementFactory);
}
public void ValidateSentinelsDuringInserts()
{
RunOnUIThread.Execute(() =>
{
var dataSource = new CustomItemsSource(Enumerable.Range(0, 10).ToList());
int getElementCallCount = 0;
int recycleElementCallCount = 0;
var elementFactory = new RecyclingElementFactoryDerived()
{
Templates = { { "key", SharedHelpers.GetDataTemplate("<TextBlock Text='{Binding}' Height='100' />") } },
RecyclePool = new RecyclePool(),
GetElementFunc = (int index, UIElement owner, UIElement elementFromBase) =>
{
getElementCallCount++;
return(elementFromBase);
},
ClearElementFunc = (UIElement element, UIElement owner) => recycleElementCallCount++,
ValidateElementIndices = false
};
var repeater = SetupRepeater(dataSource, elementFactory);
getElementCallCount = 0;
recycleElementCallCount = 0;
Log.Comment("Insert in realized range: Inserting 100 items at index 1");
dataSource.Insert(index: 1, count: 100, reset: false);
repeater.UpdateLayout();
var realized = VerifyRealizedRange(repeater, dataSource);
Verify.IsGreaterThan(realized, 0);
Verify.IsLessThan(getElementCallCount, 6);
Verify.IsLessThan(recycleElementCallCount, 6);
});
}