.containsExactly(
            EndpointPair.ordered(2, 1), EndpointPair.ordered(2, 3), EndpointPair.ordered(1, 2))
        .inOrder();
  }

  @Test
  public void incidentEdges_stableIncidentEdgeOrder_preservesIncidentEdgesOrder_undirected() {
    graph = ValueGraphBuilder.undirected().incidentEdgeOrder(ElementOrder.stable()).build();
    graph.putEdgeValue(2, 3, "2-3");
    graph.putEdgeValue(2, 1, "2-1");