public void TestChildren()
{
YogaNode parent = new YogaNode();
foreach (YogaNode node in parent)
{
Assert.Fail(node.ToString());
}
YogaNode child0 = new YogaNode();
Assert.AreEqual(-1, parent.IndexOf(child0));
parent.Insert(0, child0);
foreach (YogaNode node in parent)
{
Assert.AreEqual(0, parent.IndexOf(node));
}
YogaNode child1 = new YogaNode();
parent.Insert(1, child1);
int index = 0;
foreach (YogaNode node in parent)
{
Assert.AreEqual(index++, parent.IndexOf(node));
}
parent.RemoveAt(0);
Assert.AreEqual(-1, parent.IndexOf(child0));
Assert.AreEqual(0, parent.IndexOf(child1));
parent.Clear();
Assert.AreEqual(0, parent.Count);
parent.Clear();
Assert.AreEqual(0, parent.Count);
}
/// <summary>
/// Replaces a child Yoga node with a new one
/// </summary>
/// <param name="oldNode">Old Yoga node child.</param>
/// <param name="newNode">New Yoga node child.</param>
public void ReplaceYogaNode(YogaNode oldNode, YogaNode newNode)
{
if (_yogaNode == null)
{
throw new InvalidOperationException(
"Cannot replace a Yoga child node when there's no parent!");
}
int index = _yogaNode.IndexOf(oldNode);
if (index < 0)
{
throw new InvalidOperationException(
"Yoga child node is not present in parent!");
}
_yogaNode.RemoveAt(index);
_yogaNode.Insert(index, newNode);
}