Jestjs Jest检查错误实例

我刚开始开玩笑，有一个愚蠢的检查我无法处理，我想检查是否有错误，我试了下一句，但不起作用，你知道我做错了什么吗

//This is the function I want to check
const ReadDir = (path) =>
    new Promise((resolve, reject) => {
        fs.readdir(path, (err, files) => err ? reject(err) : resolve(files));
    });

//This is the test
it('should return an error', (done) => {
    ReadRid('this is not a dir').catch((err) => {
        expect(err).toBeInstanceOf('Error');
    });
});

---

非常感谢

以下是此测试的工作案例：

//This is the test
describe('testing ReadDir', function () {

  //This is the function I want to check
  const readDir = (path) =>
    new Promise((resolve, reject) => {
      fs.readdir(path, (err, files) => err ? reject(err) : resolve(files))
    })

  it('should return an error test 2', async () => {
    await expect(readDir('this is not a dir'))
      .rejects
      .toThrowError(new Error('ENOENT: no such file or directory, scandir \'C:\\dev\\mph-backend\\this is not a dir\''))
  })
})

---

用最新的笑话24，看两件事：1。如果你在测试承诺，你必须回报承诺；二,。从节点回调中得到的

错误与
错误不同。非常感谢您回答jonrsharpe，我将更改代码并再次尝试测试