public void ValidateInserts()
{
RunOnUIThread.Execute(() =>
{
var dataSource = new CustomItemsSource(Enumerable.Range(0, 10).ToList());
var repeater = SetupRepeater(dataSource);
Log.Comment("Insert in realized range: Inserting 3 items at index 4");
dataSource.Insert(index: 4, count: 3, reset: false);
repeater.UpdateLayout();
var realized = VerifyRealizedRange(repeater, dataSource);
Verify.IsGreaterThan(realized, 0);
Log.Comment("Insert before realized range: Inserting 3 items at index 0");
dataSource.Insert(index: 0, count: 3, reset: false);
repeater.UpdateLayout();
realized = VerifyRealizedRange(repeater, dataSource);
Verify.IsGreaterThan(realized, 0);
Log.Comment("Insert after realized range: Inserting 3 items at index 10");
dataSource.Insert(index: 10, count: 3, reset: false);
repeater.UpdateLayout();
realized = VerifyRealizedRange(repeater, dataSource);
Verify.IsGreaterThan(realized, 0);
});
}
public void CanRemoveAndInsertItemsInRealizedRange()
{
RunOnUIThread.Execute(() =>
{
var dataSource = new CustomItemsSource(Enumerable.Range(0, 3).ToList());
var repeater = SetupRepeater(dataSource);
var realized = VerifyRealizedRange(repeater, dataSource);
Verify.AreEqual(3, realized);
Log.Comment("Remove index 1 in realized range");
dataSource.Remove(index: 1, count: 1, reset: false);
repeater.UpdateLayout();
realized = VerifyRealizedRange(repeater, dataSource);
Verify.AreEqual(2, realized);
Log.Comment("Add 5 items at index 1");
dataSource.Insert(index: 1, count: 5, reset: false);
repeater.UpdateLayout();
realized = VerifyRealizedRange(repeater, dataSource);
Verify.AreEqual(3, realized);
});
}
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);
});
}