public void Calling_Contains_should_return_true_when_xenwidget_is_a_descendant_of_root()
{
var label = new Label();
var child = new Entry {
Placeholder = "text"
};
var layout = new StackLayout();
layout.Children.Add(child);
var page = new ContentPage {
Content = layout
};
var mgr = new XamarinDesignSurfaceManager();
mgr.SetDesignSurface(page);
var childPair = mgr[child.Id.ToString()];
var containsWidget = mgr.Contains(childPair.XenWidget);
var containsVisual = mgr.Contains(childPair.VisualElement);
var containsLabel = mgr.Contains(label);
Assert.IsTrue(containsWidget, "XenWidget not found.");
Assert.IsTrue(containsVisual, "VisualElement not found.");
Assert.IsFalse(containsLabel, "Label was not added to the page.");
}