Function editTest

packages/quill/test/unit/core/quill.spec.ts:343–384

(
      oldText: string,
      oldSelection: number | Range,
      newText: string,
      newSelection: number | Range,
      expectedDelta: Delta,
    )

    });

    const editTest = (
      oldText: string,
      oldSelection: number | Range,
      newText: string,
      newSelection: number | Range,
      expectedDelta: Delta,
    ) => {
      return async () => {
        const { quill } = setup();
        quill.setText(`${oldText}\n`);
        // @ts-expect-error
        quill.setSelection(oldSelection);
        quill.update();
        const oldContents = quill.getContents();
        const textNode = quill.root.firstChild?.firstChild as Text;
        textNode.data = newText;
        if (typeof newSelection === 'number') {
          quill.selection.setNativeRange(textNode, newSelection);
        } else {
          quill.selection.setNativeRange(
            textNode,
            newSelection.index,
            textNode,
            newSelection.index + newSelection.length,
          );
        }
        await new Promise((r) => setTimeout(r, 1));
        const calls = (
          quill.emitter.emit as MockedFunction<typeof quill.emitter.emit>
        ).mock.calls;
        if (calls[calls.length - 1][1] === Emitter.events.SELECTION_CHANGE) {
          calls.pop();
        }
        const args = calls.pop();
        expect(args).toEqual([
          Emitter.events.TEXT_CHANGE,
          expectedDelta,
          oldContents,
          Emitter.sources.USER,
        ]);
      };
    };

    describe('insert a in aaaa', () => {
      test(