ComfyUI_frontend/tests-ui/tests/litegraph.test.ts

import { LiteGraph } from "@comfyorg/litegraph";
import { LGraph } from "@comfyorg/litegraph";
import { LGraphNode } from "@comfyorg/litegraph";

function swapNodes(nodes: LGraphNode[]) {
  const firstNode = nodes[0];
  const lastNode = nodes[nodes.length - 1];
  nodes[0] = lastNode;
  nodes[nodes.length - 1] = firstNode;
  return nodes;
}

function createGraph(...nodes: LGraphNode[]) {
  const graph = new LGraph();
  nodes.forEach((node) => graph.add(node));
  return graph;
}

class DummyNode extends LGraphNode {
  constructor() {
    super();
  }
}

describe("LGraph", () => {
  it("should serialize deterministic node order", async () => {
    LiteGraph.registerNodeType("dummy", DummyNode);
    const node1 = new DummyNode();
    const node2 = new DummyNode();
    const graph = createGraph(node1, node2);

    const result1 = graph.serialize();
    expect(result1.nodes).not.toHaveLength(0);
    // @ts-ignore
    graph._nodes = swapNodes(graph._nodes);
    const result2 = graph.serialize();

    expect(result1).toEqual(result2);
  });
});