前提・実現したいこと

jestでユニットテストをしていたら下記のエラーにでくわし、はまりました。
inversifyJsの@Injectを使うとなぜか構文エラーになります。

発生している問題・エラーメッセージ

Test suite failed to run

    /Users/*********/Desktop/******/app/application/timeline/CursorCreator.ts:20
    var CursorCreator = (_dec = (0, _inversify.injectable)(), _dec(_class = (_temp = function CursorCreator(@(0, _inversify.inject)(_types.default.CursorDao)
                                                                                                            ^

    SyntaxError: Invalid or unexpected token

      2 | import { CursorDao } from "../../../app/di/interfaces";
      3 | import Timestamp from "../../../app/util/Timestamp";
    > 4 | import CursorCreator from "../../../app/application/timeline/CursorCreator";
        | ^
      5 | 
      6 | describe('CursorCreatorTest', () => {
      7 | 

      at ScriptTransformer._transformAndBuildScript (node_modules/@jest/transform/build/ScriptTransformer.js:537:17)
      at ScriptTransformer.transform (node_modules/@jest/transform/build/ScriptTransformer.js:579:25)
      at Object.<anonymous> (__tests__/application/timeline/CursorCreatorTest.ts:4:1)

該当のソースコード

Typescript
1import { CursorDao } from "../../di/interfaces";
2import Timestamp from "../../util/Timestamp";
3import { injectable, inject } from "inversify";
4import TYPES from "../../di/types";
5
6@injectable()
7class CursorCreator {
8  private readonly dao: CursorDao
9  private readonly LIMIT_ELAPSE = 4;
10  private readonly SEC_OF_A_DATE = (60 * 60 * 24);
11
12  constructor(@inject(TYPES.CursorDao) dao: CursorDao) {
13    this.dao = dao;
14  }
15......

Typescript
1import { CursorDao } from "../../../app/di/interfaces";
2import Timestamp from "../../../app/util/Timestamp";
3import CursorCreator from "../../../app/application/timeline/CursorCreator";
4
5describe('CursorCreatorTest', () => {
6
7  it('カーソルが0, 0の時のテスト', async () => {
8    const dao = new CursorDaoMock();
9    const cursorCreator = new CursorCreator(dao);
10    const expectSecond = Math.floor(Date.now() / (1000 * 24 * 60 * 60)) * (24 * 60 * 60);
11    expect(await cursorCreator.create()).toBe(new Timestamp(expectSecond, 0));
12  });
13........