public void Track_By_Name_Should_Find_Control_Added_Later()
{
StackPanel panel;
TextBlock relativeTo;
var root = new TestRoot
{
Child = (panel = new StackPanel
{
Children = new Controls.Controls
{
(relativeTo = new TextBlock
{
Name = "start"
}),
}
})
};
var locator = ControlLocator.Track(relativeTo, "target");
var target = new TextBlock { Name = "target" };
var result = new List<IControl>();
using (locator.Subscribe(x => result.Add(x)))
{
panel.Children.Add(target);
}
Assert.Equal(new[] { null, target }, result);
Assert.Equal(0, root.NameScopeRegisteredSubscribers);
Assert.Equal(0, root.NameScopeUnregisteredSubscribers);
}
public void Track_By_Name_Should_Track_Removal_And_Readd()
{
StackPanel panel;
TextBlock target;
TextBlock relativeTo;
var root = new TestRoot
{
Child = panel = new StackPanel
{
Children = new Controls.Controls
{
(target = new TextBlock {
Name = "target"
}),
(relativeTo = new TextBlock {
Name = "start"
}),
}
}
};
var locator = ControlLocator.Track(relativeTo, "target");
var result = new List <IControl>();
locator.Subscribe(x => result.Add(x));
var other = new TextBlock {
Name = "target"
};
panel.Children.Remove(target);
panel.Children.Add(other);
Assert.Equal(new[] { target, null, other }, result);
}
public async void Track_By_Name_Should_Find_Control_Added_Earlier()
{
TextBlock target;
TextBlock relativeTo;
var root = new TestRoot
{
Child = new StackPanel
{
Children = new Controls.Controls
{
(target = new TextBlock { Name = "target" }),
(relativeTo = new TextBlock { Name = "start" }),
}
}
};
var locator = ControlLocator.Track(relativeTo, "target");
var result = await locator.Take(1);
Assert.Same(target, result);
Assert.Equal(0, root.NameScopeRegisteredSubscribers);
Assert.Equal(0, root.NameScopeUnregisteredSubscribers);
}
public void Track_By_Name_Should_Find_Control_When_Tree_Changed()
{
TextBlock target1;
TextBlock target2;
TextBlock relativeTo;
var root1 = new TestRoot
{
Child = new StackPanel
{
Children = new Controls.Controls
{
(relativeTo = new TextBlock
{
Name = "start"
}),
(target1 = new TextBlock { Name = "target" }),
}
}
};
var root2 = new TestRoot
{
Child = new StackPanel
{
Children = new Controls.Controls
{
(target2 = new TextBlock { Name = "target" }),
}
}
};
var locator = ControlLocator.Track(relativeTo, "target");
var target = new TextBlock { Name = "target" };
var result = new List<IControl>();
using (locator.Subscribe(x => result.Add(x)))
{
((StackPanel)root1.Child).Children.Remove(relativeTo);
((StackPanel)root2.Child).Children.Add(relativeTo);
}
Assert.Equal(new[] { target1, null, target2 }, result);
Assert.Equal(0, root1.NameScopeRegisteredSubscribers);
Assert.Equal(0, root1.NameScopeUnregisteredSubscribers);
}
public void Track_By_Name_Should_Track_Removal_And_Readd()
{
StackPanel panel;
TextBlock target;
TextBlock relativeTo;
var root = new TestRoot
{
Child = panel = new StackPanel
{
Children = new Controls.Controls
{
(target = new TextBlock { Name = "target" }),
(relativeTo = new TextBlock { Name = "start" }),
}
}
};
var locator = ControlLocator.Track(relativeTo, "target");
var result = new List<IControl>();
locator.Subscribe(x => result.Add(x));
var other = new TextBlock { Name = "target" };
panel.Children.Remove(target);
panel.Children.Add(other);
Assert.Equal(new[] { target, null, other }, result);
}