void () { Node r1 = new Node(0,0, new Node(1,0, new Node(2,0), new Node(3,1))); Node r2 = new Node(0,0, new Node(1,0, new Node(2,0), new Node(4,1), new Node(3,2))); String expected = "INSERTED to 1: 4 at 1"; performTest(r1, r2, expected); }