public void Containers_Correct_After_Clear_Add_Remove()
{
using (UnitTestApplication.Start(TestServices.StyledWindow))
{
// Issue #1936
var items = new AvaloniaList <string>(Enumerable.Range(0, 11).Select(x => $"Item {x}"));
var target = new ListBox
{
Template = ListBoxTemplate(),
Items = items,
ItemTemplate = new FuncDataTemplate <string>((x, _) => new TextBlock {
Width = 20, Height = 10
}),
SelectedIndex = 0,
};
Prepare(target);
items.Clear();
items.AddRange(Enumerable.Range(0, 11).Select(x => $"Item {x}"));
items.Remove("Item 2");
Assert.Equal(
items,
target.Presenter.Panel.Children.Cast <ListBoxItem>().Select(x => (string)x.Content));
}
}
public void Should_Add_Containers_For_Items_After_Clear()
{
var target = CreateTarget(itemCount: 10);
var defaultItems = (IList <string>)target.Items;
var items = new AvaloniaList <string>(defaultItems);
target.Items = items;
target.ApplyTemplate();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(target.DesiredSize));
Assert.Equal(10, target.Panel.Children.Count);
items.Clear();
target.Panel.Measure(new Size(100, 100));
target.Panel.Arrange(new Rect(target.Panel.DesiredSize));
target.Measure(new Size(100, 100));
target.Arrange(new Rect(target.DesiredSize));
Assert.Empty(target.Panel.Children);
items.AddRange(defaultItems.Select(s => s + " new"));
target.Panel.Measure(new Size(100, 100));
target.Panel.Arrange(new Rect(target.Panel.DesiredSize));
target.Measure(new Size(100, 100));
target.Arrange(new Rect(target.DesiredSize));
Assert.Equal(10, target.Panel.Children.Count);
}
public void AddRange_Items_Should_Raise_Correct_CollectionChanged()
{
var target = new AvaloniaList <object>();
var eventItems = new List <object>();
target.CollectionChanged += (sender, args) =>
{
eventItems.AddRange(args.NewItems.Cast <object>());
};
target.AddRange(Enumerable.Range(0, 10).Select(i => new object()));
Assert.Equal(eventItems, target);
}
public void AddRange_IEnumerable_Should_Raise_Count_PropertyChanged()
{
var target = new AvaloniaList <int>(new[] { 1, 2, 3, 4, 5 });
var raised = false;
target.PropertyChanged += (s, e) => {
Assert.Equal(e.PropertyName, nameof(target.Count));
Assert.Equal(target.Count, 7);
raised = true;
};
target.AddRange(Enumerable.Range(6, 2));
Assert.True(raised);
}
public void Adding_Items_Should_Raise_CollectionChanged()
{
var target = new AvaloniaList <int>(new[] { 1, 2 });
var raised = false;
target.CollectionChanged += (s, e) =>
{
Assert.Equal(target, s);
Assert.Equal(NotifyCollectionChangedAction.Add, e.Action);
Assert.Equal(new[] { 3, 4 }, e.NewItems.Cast <int>());
Assert.Equal(2, e.NewStartingIndex);
raised = true;
};
target.AddRange(new[] { 3, 4 });
Assert.True(raised);
}
public void AddRange_With_Null_Should_Throw_Exception()
{
var target = new AvaloniaList <int>();
Assert.Throws <ArgumentNullException>(() => target.AddRange(null));
}
public void AddRange_With_Null_Should_Throw_Exception()
{
var target = new AvaloniaList<int>();
Assert.Throws<ArgumentNullException>(() => target.AddRange(null));
}
public void Adding_Items_Should_Raise_CollectionChanged()
{
var target = new AvaloniaList<int>(new[] { 1, 2 });
var raised = false;
target.CollectionChanged += (s, e) =>
{
Assert.Equal(target, s);
Assert.Equal(NotifyCollectionChangedAction.Add, e.Action);
Assert.Equal(new[] { 3, 4 }, e.NewItems.Cast<int>());
Assert.Equal(2, e.NewStartingIndex);
raised = true;
};
target.AddRange(new[] { 3, 4 });
Assert.True(raised);
}
public void Should_Add_Containers_For_Items_After_Clear()
{
var target = CreateTarget(itemCount: 10);
var defaultItems = (IList<string>)target.Items;
var items = new AvaloniaList<string>(defaultItems);
target.Items = items;
target.ApplyTemplate();
target.Measure(new Size(100, 100));
target.Arrange(new Rect(target.DesiredSize));
Assert.Equal(10, target.Panel.Children.Count);
items.Clear();
target.Panel.Measure(new Size(100, 100));
target.Panel.Arrange(new Rect(target.Panel.DesiredSize));
target.Measure(new Size(100, 100));
target.Arrange(new Rect(target.DesiredSize));
Assert.Equal(0, target.Panel.Children.Count);
items.AddRange(defaultItems.Select(s => s + " new"));
target.Panel.Measure(new Size(100, 100));
target.Panel.Arrange(new Rect(target.Panel.DesiredSize));
target.Measure(new Size(100, 100));
target.Arrange(new Rect(target.DesiredSize));
Assert.Equal(10, target.Panel.Children.Count);
}