public void VerifyCallingResetMultipleTimesOnUniqueIdItemsSource()
{
RunOnUIThread.Execute(() =>
{
var data = new CustomItemsSourceWithUniqueId(Enumerable.Range(0, 5).ToList());
var repeater = new ItemsRepeater()
{
ItemsSource = data,
Animator = new DefaultElementAnimator()
};
Content = new Windows.UI.Xaml.Controls.ScrollViewer()
{
Width = 400,
Height = 400,
Content = repeater
};
Content.UpdateLayout();
data.Reset();
data.Reset();
Content.UpdateLayout();
Verify.AreEqual(5, repeater.ItemsSourceView.Count);
for (int i = 0; i < 5; i++)
{
Verify.IsNotNull(repeater.TryGetElement(i));
}
});
}
// [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 */); }
});
}
public void ValidateStableResets()
{
RunOnUIThread.Execute(() =>
{
var dataSource = new CustomItemsSourceWithUniqueId(Enumerable.Range(0, 3).ToList());
var repeater = SetupRepeater(dataSource);
Log.Comment("Reset collection");
dataSource.GetAtCallCount = 0;
dataSource.Reset();
repeater.UpdateLayout();
// Make sure data was not requested because during a stable reset
// the elements and associated bound data are reused
Verify.AreEqual(0, dataSource.GetAtCallCount);
var realized = VerifyRealizedRange(repeater, dataSource);
Verify.AreEqual(3, realized);
});
}
public void ValidateElementIndexChangedEventOnStableReset()
{
CustomItemsSource dataSource = null;
RunOnUIThread.Execute(() => dataSource = new CustomItemsSourceWithUniqueId(Enumerable.Range(0, 10).ToList()));
var repeater = SetupRepeater(dataSource);
RunOnUIThread.Execute(() =>
{
List <int> preparedIndices = new List <int>();
List <int> clearedIndices = new List <int>();
List <KeyValuePair <int, int> > changedIndices = new List <KeyValuePair <int, int> >();
repeater.ElementPrepared += (sender, args) =>
{
preparedIndices.Add(args.Index);
};
repeater.ElementClearing += (sender, args) =>
{
clearedIndices.Add(sender.GetElementIndex(args.Element));
};
repeater.ElementIndexChanged += (sender, args) =>
{
changedIndices.Add(new KeyValuePair <int, int>(args.OldIndex, args.NewIndex));
};
Log.Comment("(UniqueId Reset) Insert in realized range: Inserting 1 item at index 1");
dataSource.Insert(index: 1, count: 1, reset: true, valueStart: 2000);
repeater.UpdateLayout();
Verify.AreEqual(1, preparedIndices.Count);
Verify.AreEqual(1, preparedIndices[0]);
Verify.AreEqual(1, changedIndices.Count);
Verify.IsTrue(changedIndices.Contains(new KeyValuePair <int, int>(1, 2)));
foreach (var ch in changedIndices)
{
Log.Comment("Changed " + ch.Key + " " + ch.Value);
}
Verify.AreEqual(1, clearedIndices.Count);
Verify.AreEqual(2, clearedIndices[0]);
preparedIndices.Clear();
clearedIndices.Clear();
changedIndices.Clear();
Log.Comment("(UniqueId Reset) Remove in realized range: Removing 1 item at index 0");
dataSource.Remove(index: 0, count: 1, reset: true);
repeater.UpdateLayout();
Verify.AreEqual(1, clearedIndices.Count);
Verify.AreEqual(0, clearedIndices[0]);
foreach (var ch in changedIndices)
{
Log.Comment("Changed " + ch.Key + " " + ch.Value);
}
Verify.AreEqual(1, preparedIndices.Count);
Verify.AreEqual(2, preparedIndices[0]);
Verify.AreEqual(2, changedIndices.Count);
Verify.IsTrue(changedIndices.Contains(new KeyValuePair <int, int>(1, 0)));
Verify.IsTrue(changedIndices.Contains(new KeyValuePair <int, int>(2, 1)));
});
}