public void Adding_Already_Parented_Control_Should_Throw()
{
var root1 = new TestRoot();
var root2 = new TestRoot();
var child = new TestVisual();
root1.AddChild(child);
Assert.Throws<InvalidOperationException>(() => root2.AddChild(child));
Assert.Equal(0, root2.GetVisualChildren().Count());
}
public void Adding_Children_Should_Fire_OnAttachedToVisualTree()
{
var child2 = new TestVisual();
var child1 = new TestVisual { Child = child2 };
var root = new TestRoot();
var called1 = false;
var called2 = false;
child1.AttachedToVisualTree += (s, e) => called1 = true;
child2.AttachedToVisualTree += (s, e) => called2 = true;
root.Child = child1;
Assert.True(called1);
Assert.True(called2);
}
public void Should_Log_Binding_Error_When_Attached_To_Logical_Tree()
{
var target = new Decorator();
var root = new TestRoot {
Child = target, DataContext = "foo"
};
var called = false;
LogCallback checkLogMessage = (level, area, src, mt, pv) =>
{
if (level >= Logging.LogEventLevel.Warning)
{
called = true;
}
};
using (TestLogSink.Start(checkLogMessage))
{
target.Bind(Decorator.TagProperty, new Binding("Foo"));
}
Assert.True(called);
}
public void FindDescendantOfType_Finds_Nested_Child()
{
Button target;
var root = new TestRoot
{
Child = new StackPanel
{
Children =
{
new StackPanel
{
Children =
{
(target = new Button())
}
}
}
}
};
Assert.Equal(target, root.FindDescendantOfType <Button>());
}
public void FindAncestorOfType_Finds_Ancestor_Of_Nested_Child()
{
Button target;
var root = new TestRoot
{
Child = new StackPanel
{
Children =
{
new StackPanel
{
Children =
{
(target = new Button())
}
}
}
}
};
Assert.Equal(root, target.FindAncestorOfType <TestRoot>());
}
public void Root_Should_Retun_Self_As_VisualRoot()
{
var root = new TestRoot();
Assert.Same(root, ((IVisual)root).VisualRoot);
}
public void Removing_Children_Should_Fire_OnDetachedFromVisualTree()
{
var child2 = new TestVisual();
var child1 = new TestVisual { Child = child2 };
var root = new TestRoot();
var called1 = false;
var called2 = false;
root.Child = child1;
child1.DetachedFromVisualTree += (s, e) => called1 = true;
child2.DetachedFromVisualTree += (s, e) => called2 = true;
root.Child = null;
Assert.True(called1);
Assert.True(called2);
}
