loro/loro-js/tests/json.test.ts

import { expect, it } from "vitest";
import {
  Loro,
  LoroMap,
  TextOp,
} from "../src";

it("json encoding", () => {
  const doc = new Loro();
  const text = doc.getText("text");
  text.insert(0, "123");
  const map = doc.getMap("map");
  const list = doc.getList("list");
  const movableList = doc.getMovableList("movableList");
  const tree = doc.getTree("tree");
  const subMap = map.setContainer("subMap", new LoroMap());
  subMap.set("foo", "bar");
  list.push("foo");
  list.push("🦜");
  movableList.push("move list");
  movableList.push("🦜");
  movableList.move(1, 0);
  const root = tree.createNode(undefined);
  const child = tree.createNode(root.id);
  child.data.set("tree", "abc");
  text.mark({ start: 0, end: 3 }, "bold", true);
  const json = doc.exportJsonUpdates();
  // console.log(json.changes[0].ops);
  const doc2 = new Loro();
  doc2.importJsonUpdates(json);
});

it("json decoding", () => {
  const v15Json = `{
    "schema_version": 1,
    "start_version": {},
    "peers": [
      "14944917281143706156"
    ],
    "changes": [
      {
        "id": "0@0",
        "timestamp": 0,
        "deps": [],
        "lamport": 0,
        "msg": null,
        "ops": [
          {
            "container": "cid:root-text:Text",
            "content": {
              "type": "insert",
              "pos": 0,
              "text": "123"
            },
            "counter": 0
          },
          {
            "container": "cid:root-map:Map",
            "content": {
              "type": "insert",
              "key": "subMap",
              "value": "🦜:cid:3@0:Map"
            },
            "counter": 3
          },
          {
            "container": "cid:3@0:Map",
            "content": {
              "type": "insert",
              "key": "foo",
              "value": "bar"
            },
            "counter": 4
          },
          {
            "container": "cid:root-list:List",
            "content": {
              "type": "insert",
              "pos": 0,
              "value": [
                "foo",
                "🦜"
              ]
            },
            "counter": 5
          },
          {
            "container": "cid:root-tree:Tree",
            "content": {
              "type": "move",
              "target": "7@0",
              "parent": null
            },
            "counter": 7
          },
          {
            "container": "cid:root-tree:Tree",
            "content": {
              "type": "move",
              "target": "8@0",
              "parent": "7@0"
            },
            "counter": 8
          },
          {
            "container": "cid:8@0:Map",
            "content": {
              "type": "insert",
              "key": "tree",
              "value": "abc"
            },
            "counter": 9
          },
          {
            "container": "cid:root-text:Text",
            "content": {
              "type": "mark",
              "start": 0,
              "end": 3,
              "style_key": "bold",
              "style_value": true,
              "info": 132
            },
            "counter": 10
          },
          {
            "container": "cid:root-text:Text",
            "content": {
              "type": "mark_end"
            },
            "counter": 11
          }
        ]
      }
    ]
  }`;
  const doc = new Loro();
  doc.importJsonUpdates(v15Json);
  // console.log(doc.exportJsonUpdates());
});

it("test some type correctness", () => {
  const doc = new Loro();
  doc.setPeerId(0);
  doc.getText("text").insert(0, "123");
  doc.commit();
  doc.getText("text").delete(2, 1);
  doc.getText("text").delete(1, 1);
  doc.getText("text").delete(0, 1);
  doc.commit();
  const updates = doc.exportJsonUpdates();
  expect(updates.start_version).toBeDefined();
  expect(updates.changes.length).toBe(1);
  expect(updates.changes[0].ops[0].content).toStrictEqual({
    type: "insert",
    pos: 0,
    text: "123",
  } as TextOp);
  expect(updates.changes[0].ops[1].content).toStrictEqual({
    type: "delete",
    pos: 2,
    len: -3,
    start_id: "0@0",
  } as TextOp);
});