oldNode = &v1.Node{ObjectMeta: metav1.ObjectMeta{Name: "nonexisting-node"}}
			}
			nt.updateNode(logger, oldNode, test.nodeToUpdate)
			verifyNodeTree(t, nt, test.expectedTree)
		})
	}
}

func TestNodeTree_List(t *testing.T) {
	tests := []struct {
		name           string
		nodesToAdd     []*v1.Node
		expectedOutput []string
	}{
		{
			name:           "empty tree",
			nodesToAdd:     nil,