public void ForEachSibling() { var r = new MapNode(new MapTree(), "r"); var c1 = new MapNode(r, "c1"); var c11 = new MapNode(c1, "c11"); var c12 = new MapNode(c1, "c12"); var c13 = new MapNode(c1, "c13"); var c14 = new MapNode(c1, "c14"); var c15 = new MapNode(c1, "c15"); var c2 = new MapNode(r, "c2"); var c3 = new MapNode(r, "c3", NodePosition.Left); c3.Folded = true; var c31 = new MapNode(c3, "c31"); var c32 = new MapNode(c3, "c32"); c13.ForEachSibling(n => n.Text = "Updated"); Assert.AreEqual("Updated", c11.Text); Assert.AreEqual("Updated", c12.Text); Assert.AreNotEqual("Updated", c13.Text); Assert.AreEqual("Updated", c14.Text); Assert.AreEqual("Updated", c15.Text); Assert.AreNotEqual("Updated", c2.Text); }