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

import { describe, expect, expectTypeOf, it } from "vitest";
import {
  Loro,
  LoroList,
  LoroMap,
  isContainer,
  getType,
  VersionVector,
} from "../src";
import { Container } from "../dist/loro";

it("basic example", () => {
  const doc = new Loro();
  const list: LoroList = doc.getList("list");
  list.insert(0, "A");
  list.insert(1, "B");
  list.insert(2, "C");

  const map: LoroMap = doc.getMap("map");
  // map can only has string key
  map.set("key", "value");
  expect(doc.toJson()).toStrictEqual({
    list: ["A", "B", "C"],
    map: { key: "value" },
  });

  // delete 2 elements at index 0
  list.delete(0, 2);
  expect(doc.toJson()).toStrictEqual({
    list: ["C"],
    map: { key: "value" },
  });

  // Insert a text container to the list
  const text = list.insertContainer(0, "Text");
  text.insert(0, "Hello");
  text.insert(0, "Hi! ");

  // delete 1 element at index 0
  expect(doc.toJson()).toStrictEqual({
    list: ["Hi! Hello", "C"],
    map: { key: "value" },
  });

  // Insert a list container to the map
  const list2 = map.setContainer("test", "List");
  list2.insert(0, 1);
  expect(doc.toJson()).toStrictEqual({
    list: ["Hi! Hello", "C"],
    map: { key: "value", test: [1] },
  });
});

it("basic sync example", () => {
  const docA = new Loro();
  const docB = new Loro();
  const listA: LoroList = docA.getList("list");
  listA.insert(0, "A");
  listA.insert(1, "B");
  listA.insert(2, "C");
  // B import the ops from A
  docB.import(docA.exportFrom());
  expect(docB.toJson()).toStrictEqual({
    list: ["A", "B", "C"],
  });

  const listB: LoroList = docB.getList("list");
  // delete 1 element at index 1
  listB.delete(1, 1);
  // A import the ops from B
  docA.import(docB.exportFrom(docA.version()));
  // list at A is now ["A", "C"], with the same state as B
  expect(docA.toJson()).toStrictEqual({
    list: ["A", "C"],
  });
  expect(docA.toJson()).toStrictEqual(docB.toJson());
});

it("basic events", () => {
  const doc = new Loro();
  doc.subscribe((event) => {});
  const list = doc.getList("list");
});

describe("list", () => {
  it("insert containers", () => {
    const doc = new Loro();
    const list = doc.getList("list");
    const map = list.insertContainer(0, "Map");
    map.set("key", "value");
    const v = list.get(0) as LoroMap;
    console.log(v);
    expect(v instanceof LoroMap).toBeTruthy();
    expect(v.toJson()).toStrictEqual({ key: "value" });
  });

  it("toArray", () => {
    const doc = new Loro();
    const list = doc.getList("list");
    list.insert(0, 1);
    list.insert(1, 2);
    expect(list.toArray()).toStrictEqual([1, 2]);
    list.insertContainer(2, "Text");
    const t = list.toArray()[2];
    expect(isContainer(t)).toBeTruthy();
    expect(getType(t)).toBe("Text");
    expect(getType(123)).toBe("Json");
  });
});

describe("map", () => {
  it("get child container", () => {
    const doc = new Loro();
    const map = doc.getMap("map");
    const list = map.setContainer("key", "List");
    list.insert(0, 1);
    expect(map.get("key") instanceof LoroList).toBeTruthy();
    expect((map.get("key") as LoroList).toJson()).toStrictEqual([1]);
  });

  it("set large int", () => {
    const doc = new Loro();
    const map = doc.getMap("map");
    map.set("key", 2147483699);
    expect(map.get("key")).toBe(2147483699);
  });
});

describe("import", () => {
  it("pending", () => {
    const a = new Loro();
    a.getText("text").insert(0, "a");
    const b = new Loro();
    b.import(a.exportFrom());
    b.getText("text").insert(1, "b");
    const c = new Loro();
    c.import(b.exportFrom());
    c.getText("text").insert(2, "c");

    // c export from b's version, which cannot be imported directly to a.
    // This operation is pending.
    a.import(c.exportFrom(b.version()));
    expect(a.getText("text").toString()).toBe("a");

    // a import the missing ops from b. It makes the pending operation from c valid.
    a.import(b.exportFrom(a.version()));
    expect(a.getText("text").toString()).toBe("abc");
  });

  it("import by frontiers", () => {
    const a = new Loro();
    a.getText("text").insert(0, "a");
    const b = new Loro();
    b.import(a.exportFrom());
    b.getText("text").insert(1, "b");
    b.getList("list").insert(0, [1, 2]);
    const updates = b.exportFrom(b.frontiersToVV(a.frontiers()));
    a.import(updates);
    expect(a.toJson()).toStrictEqual(b.toJson());
  });

  it("from snapshot", () => {
    const a = new Loro();
    a.getText("text").insert(0, "hello");
    const bytes = a.exportSnapshot();
    const b = Loro.fromSnapshot(bytes);
    b.getText("text").insert(0, "123");
    expect(b.toJson()).toStrictEqual({ text: "123hello" });
  });

  it("importBatch Error #181", () => {
    const docA = new Loro();
    const updateA = docA.exportSnapshot();
    const docB = new Loro();
    docB.importUpdateBatch([updateA]);
    docB.getText("text").insert(0, "hello");
    docB.commit();
    console.log(docB.exportFrom());
  });
});

describe("map", () => {
  it("keys", () => {
    const doc = new Loro();
    const map = doc.getMap("map");
    map.set("foo", "bar");
    map.set("baz", "bar");
    const entries = map.keys();
    expect(entries).toStrictEqual(["foo", "baz"]);
  });

  it("values", () => {
    const doc = new Loro();
    const map = doc.getMap("map");
    map.set("foo", "bar");
    map.set("baz", "bar");
    const entries = map.values();
    expect(entries).toStrictEqual(["bar", "bar"]);
  });

  it("entries", () => {
    const doc = new Loro();
    const map = doc.getMap("map");
    map.set("foo", "bar");
    map.set("baz", "bar");
    map.set("new", 11);
    map.delete("new");
    const entries = map.entries();
    expect(entries).toStrictEqual([
      ["foo", "bar"],
      ["baz", "bar"],
    ]);
  });

  it("entries should return container handlers", () => {
    const doc = new Loro();
    const map = doc.getMap("map");
    map.setContainer("text", "Text");
    map.set("foo", "bar");
    const entries = map.entries();
    expect((entries[0][1]! as Container).kind() === "Text").toBeTruthy();
  });
});

it("handlers should still be usable after doc is dropped", () => {
  const doc = new Loro();
  const text = doc.getText("text");
  const list = doc.getList("list");
  const map = doc.getMap("map");
  doc.free();
  text.insert(0, "123");
  expect(text.toString()).toBe("123");
  list.insert(0, 1);
  expect(list.toJson()).toStrictEqual([1]);
  map.set("k", 8);
  expect(map.toJson()).toStrictEqual({ k: 8 });
});

it("get change with given lamport", () => {
  const doc1 = new Loro();
  doc1.setPeerId(1);
  const doc2 = new Loro();
  doc2.setPeerId(2);
  doc1.getText("text").insert(0, "01234");
  doc2.import(doc1.exportFrom());
  doc2.getText("text").insert(0, "56789");
  doc1.import(doc2.exportFrom());
  doc1.getText("text").insert(0, "01234");
  doc1.commit();
  {
    const change = doc1.getChangeAtLamport("1", 1)!;
    expect(change.lamport).toBe(0);
    expect(change.peer).toBe("1");
    expect(change.length).toBe(5);
  }
  {
    const change = doc1.getChangeAtLamport("1", 7)!;
    expect(change.lamport).toBe(0);
    expect(change.peer).toBe("1");
    expect(change.length).toBe(5);
  }
  {
    const change = doc1.getChangeAtLamport("1", 10)!;
    expect(change.lamport).toBe(10);
    expect(change.peer).toBe("1");
    expect(change.length).toBe(5);
  }
  {
    const change = doc1.getChangeAtLamport("1", 13)!;
    expect(change.lamport).toBe(10);
    expect(change.peer).toBe("1");
    expect(change.length).toBe(5);
  }
  {
    const change = doc1.getChangeAtLamport("1", 20)!;
    expect(change.lamport).toBe(10);
    expect(change.peer).toBe("1");
    expect(change.length).toBe(5);
  }
  {
    const change = doc1.getChangeAtLamport("111", 13);
    expect(change).toBeUndefined();
  }
});

it("isContainer", () => {
  expect(isContainer("123")).toBeFalsy();
  expect(isContainer(123)).toBeFalsy();
  expect(isContainer(123n)).toBeFalsy();
  expect(isContainer(new Map())).toBeFalsy();
  expect(isContainer(new Set())).toBeFalsy();
  expect(isContainer({})).toBeFalsy();
  expect(isContainer(undefined)).toBeFalsy();
  expect(isContainer(null)).toBeFalsy();
  const doc = new Loro();
  const t = doc.getText("t");
  expect(isContainer(t)).toBeTruthy();
  expect(getType(t)).toBe("Text");
  expect(getType(123)).toBe("Json");
});

it("getValueType", () => {
  // Type tests
  const doc = new Loro();
  const t = doc.getText("t");
  expectTypeOf(getType(t)).toEqualTypeOf<"Text">();
  expect(getType(t)).toBe("Text");
  expectTypeOf(getType(123)).toEqualTypeOf<"Json">();
  expect(getType(123)).toBe("Json");
  expectTypeOf(getType(undefined)).toEqualTypeOf<"Json">();
  expect(getType(undefined)).toBe("Json");
  expectTypeOf(getType(null)).toEqualTypeOf<"Json">();
  expect(getType(null)).toBe("Json");
  expectTypeOf(getType({})).toEqualTypeOf<"Json">();
  expect(getType({})).toBe("Json");

  const map = doc.getMap("map");
  const list = doc.getList("list");
  const tree = doc.getTree("tree");
  expectTypeOf(getType(map)).toEqualTypeOf<"Map">();
  expect(getType(map)).toBe("Map");
  expectTypeOf(getType(list)).toEqualTypeOf<"List">();
  expect(getType(list)).toBe("List");
  expectTypeOf(getType(tree)).toEqualTypeOf<"Tree">();
  expect(getType(tree)).toBe("Tree");
});

it("enable timestamp", () => {
  const doc = new Loro();
  doc.setPeerId(1);
  doc.getText("123").insert(0, "123");
  doc.commit();
  {
    const c = doc.getChangeAt({ peer: "1", counter: 0 });
    expect(c.timestamp).toBe(0);
  }

  doc.setRecordTimestamp(true);
  doc.getText("123").insert(0, "123");
  doc.commit();
  {
    const c = doc.getChangeAt({ peer: "1", counter: 4 });
    expect(c.timestamp).toBeCloseTo(Date.now(), 0);
  }
});

it("commit with specified timestamp", () => {
  const doc = new Loro();
  doc.setPeerId(1);
  doc.getText("123").insert(0, "123");
  doc.commit(undefined, 111);
  const c = doc.getChangeAt({ peer: "1", counter: 0 });
  expect(c.timestamp).toBe(111);
});

it("can control the mergeable interval", () => {
  {
    const doc = new Loro();
    doc.setPeerId(1);
    doc.getText("123").insert(0, "1");
    doc.commit(undefined, 110);
    doc.getText("123").insert(0, "1");
    doc.commit(undefined, 120);
    expect(doc.getAllChanges().get("1")?.length).toBe(1);
  }

  {
    const doc = new Loro();
    doc.setPeerId(1);
    doc.setChangeMergeInterval(10);
    doc.getText("123").insert(0, "1");
    doc.commit(undefined, 110);
    doc.getText("123").insert(0, "1");
    doc.commit(undefined, 120);
    expect(doc.getAllChanges().get("1")?.length).toBe(2);
  }
});