public void MultiSelect_GetAllSelectedObjects()
{
var tree = new TreeView();
TreeNode l1;
TreeNode l2;
TreeNode l3;
TreeNode l4;
var root = new TreeNode("Root");
root.Children.Add(l1 = new TreeNode("Leaf1"));
root.Children.Add(l2 = new TreeNode("Leaf2"));
root.Children.Add(l3 = new TreeNode("Leaf3"));
root.Children.Add(l4 = new TreeNode("Leaf4"));
tree.AddObject(root);
tree.MultiSelect = true;
tree.Expand(root);
Assert.Empty(tree.GetAllSelectedObjects());
tree.SelectedObject = root;
Assert.Single(tree.GetAllSelectedObjects(), root);
// move selection down 1
tree.AdjustSelection(1, false);
Assert.Single(tree.GetAllSelectedObjects(), l1);
// expand selection down 2 (e.g. shift down twice)
tree.AdjustSelection(1, true);
tree.AdjustSelection(1, true);
Assert.Equal(3, tree.GetAllSelectedObjects().Count());
Assert.Contains(l1, tree.GetAllSelectedObjects());
Assert.Contains(l2, tree.GetAllSelectedObjects());
Assert.Contains(l3, tree.GetAllSelectedObjects());
tree.Collapse(root);
// No selected objects since the root was collapsed
Assert.Empty(tree.GetAllSelectedObjects());
}