private static void VerifyElementsVisitedCount(FrameworkElement root, int visitedNoteCount)
{
App.Content = root;
var visitedItems = new List <FrameworkElement>();
var analyzer = new CountingElementAnalyzer(visitedItems);
var walker = new VisualTreeWalker(root);
walker.Analyzers.Add(analyzer);
walker.ScanVisualTree();
Assert.AreEqual(visitedNoteCount, visitedItems.Count, "Should have visited every element exactly once.");
}
public void VerifyVisitingOrderIsBreadthFirstSearch()
{
App.Content = new BreadthFirsSearchTestTree();
var visitedItems = new List <FrameworkElement>();
var analyzer = new CountingElementAnalyzer(visitedItems);
var walker = new VisualTreeWalker(App.Content);
walker.Analyzers.Add(analyzer);
walker.ScanVisualTree();
Assert.AreEqual(28, visitedItems.Count, "Should have visited every element exactly once.");
for (int i = 0; i < visitedItems.Count; i++)
{
Assert.AreEqual(i.ToString(), visitedItems[i].Tag, "Should have visited items in specific orders");
}
}
public void VerifySkippingBehaviorIsCorrect()
{
App.Content = new StackPanel()
{
Children =
{
new Button(),
new Button(),
new Button(),
new Button(),
new Button()
}
};
var visitedItems = new List <FrameworkElement>();
var analyzer = new CountingElementAnalyzer(visitedItems, false);
var walker = new VisualTreeWalker(App.Content, analyzer);
walker.ScanVisualTree();
Assert.AreEqual(1, visitedItems.Count, "Should have exactly one element.");
}
