public void TestTreeExpand()
{
var treeView = new TreeViewControl();
treeView.SystemUnderTest(new ControlLocatorDef <FindControl>(
() => new Wait(1000),
() => new FindWindow("Demo Form"),
() => new FindByAutomationId("treeView1")
));
treeView.Select("Node14");
Assert.AreEqual("Node14", treeView.SelectedItem);
treeView.Expand();
treeView.Select("Node17");
Assert.AreEqual("Node17", treeView.SelectedItem);
treeView.DblClick();
Assert.AreEqual("double clicked node: Node17", TextBoxOne.Text);
}