// [TestMethod] Issue 1018
public void ValidateFocusMoveOnElementClearedWithUniqueIds()
{
ItemsRepeater repeater = null;
CustomItemsSource dataSource = null;
RunOnUIThread.Execute(() =>
{
dataSource = new CustomItemsSourceWithUniqueId(Enumerable.Range(0, 5).ToList());
});
repeater = SetupRepeater(dataSource, "<Button Content='{Binding}' Height='10' />");
// dataSource: 0 1 2 3 4
// Index 0 deleted, focus should be on the new element which has index 0
SharedHelpers.RunActionsWithWait(
new Action[]
{
() => { MoveFocusToIndex(repeater, 0); },
() => { dataSource.Remove(0 /* index */, 1 /* count */, true /* reset*/); },
() => { ValidateCurrentFocus(repeater, 0 /*expectedIndex */, "1" /* expectedContent */); }
});
// dataSource: 1 2 3 4
// Last element deleted, focus should move to the previous element
int lastIndex = dataSource.Inner.Count - 1;
SharedHelpers.RunActionsWithWait(
new Action[]
{
() => { MoveFocusToIndex(repeater, lastIndex); },
() => { dataSource.Remove(lastIndex /* index */, 1 /* count */, true /* reset*/); },
() => { ValidateCurrentFocus(repeater, 2 /*expectedIndex */, "3" /* expectedContent */); }
});
// dataSource: 1 2 3
// Reset should keep the focused element as long as the unique id matches.
SharedHelpers.RunActionsWithWait(
new Action[]
{
() => { MoveFocusToIndex(repeater, 0); },
() => { dataSource.Reset(); },
() =>
{
int newIndex = dataSource.Inner.IndexOf(1);
ValidateCurrentFocus(repeater, newIndex /*expectedIndex */, "1" /* expectedContent */);
}
});
// dataSource: 1 2 3
// Remove multiple elements
SharedHelpers.RunActionsWithWait(
new Action[]
{
() => { MoveFocusToIndex(repeater, 0); },
() => { dataSource.Remove(0 /* index */, 2 /* count */, true /* reset*/); },
() => { ValidateCurrentFocus(repeater, 0 /*expectedIndex */, "3" /* expectedContent */); }
});
}