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

import { describe, expect, it } from "vitest";
import { Delta, Loro, TextDiff } from "../src";
import { setDebug } from "loro-wasm";

describe("richtext", () => {
  it("mark", () => {
    const doc = new Loro();
    const text = doc.getText("text");
    text.insert(0, "Hello World!");
    text.mark({ start: 0, end: 5 }, "bold", true);
    expect(text.toDelta()).toStrictEqual([
      {
        insert: "Hello",
        attributes: {
          bold: true,
        },
      },
      {
        insert: " World!",
      },
    ] as Delta<string>[]);
  });

  it("insert after emoji", () => {
    const doc = new Loro();
    const text = doc.getText("text");
    text.insert(0, "👨‍👩‍👦");
    text.insert(8, "a");
    expect(text.toString()).toBe("👨‍👩‍👦a");
  });

  it("emit event correctly", () => {
    const doc = new Loro();
    const text = doc.getText("text");
    text.subscribe(doc, (event) => {
      if (event.diff.type == "text") {
        expect(event.diff.diff).toStrictEqual([
          {
            insert: "Hello",
            attributes: {
              bold: true,
            },
          },
          {
            insert: " World!",
          },
        ] as Delta<string>[]);
      }
    });
    text.insert(0, "Hello World!");
    text.mark({ start: 0, end: 5 }, "bold", true);
  });

  it("emit event from merging doc correctly", async () => {
    const doc = new Loro();
    const text = doc.getText("text");
    let called = false;
    text.subscribe(doc, (event) => {
      if (event.diff.type == "text") {
        called = true;
        expect(event.diff.diff).toStrictEqual([
          {
            insert: "Hello",
            attributes: {
              bold: true,
            },
          },
          {
            insert: " World!",
          },
        ] as Delta<string>[]);
      }
    });

    const docB = new Loro();
    const textB = docB.getText("text");
    textB.insert(0, "Hello World!");
    textB.mark({ start: 0, end: 5 }, "bold", true);
    doc.import(docB.exportFrom());
    await new Promise((r) => setTimeout(r, 1));
    expect(called).toBeTruthy();
  });

  it("Delete emoji", async () => {
    const doc = new Loro();
    const text = doc.getText("text");
    text.insert(0, "012345👨‍👩‍👦6789");
    doc.commit();
    text.mark({ start: 0, end: 18 }, "bold", true);
    doc.commit();
    expect(text.toDelta()).toStrictEqual([
      {
        insert: "012345👨‍👩‍👦6789",
        attributes: { bold: true },
      },
    ]);
    text.delete(6, 8);
    doc.commit();
    expect(text.toDelta()).toStrictEqual([
      {
        insert: "0123456789",
        attributes: { bold: true },
      },
    ]);
  });

  it("apply delta", async () => {
    const doc = new Loro();
    const text = doc.getText("text");
    const doc2 = new Loro();
    const text2 = doc2.getText("text");
    text.subscribe(doc, (event) => {
      const e = event.diff as TextDiff;
      text2.applyDelta(e.diff);
    });
    text.insert(0, "foo");
    text.mark({ start: 0, end: 3, expand: "none" }, "link", true);
    doc.commit();
    text.insert(3, "baz");
    doc.commit();
    await new Promise((r) => setTimeout(r, 1));
    expect(text2.toDelta()).toStrictEqual([{ insert: 'foo', attributes: { link: true } }, { insert: 'baz' }]);
  })
});