为什么我的 chai-as-promised 拒绝方法不能正常运行？

Question

我使用摩卡、柴和承诺的柴。 测试应该失败，但没有，我不知道出了什么问题，有什么建议吗？

const { describe, it } = require('mocha')
const chai = require('chai')
const { expect } = require('chai')
const chaiAsPromised = require('chai-as-promised')

chai.use(chaiAsPromised)

describe('test', () => {
    it('must be rejected', async () => {
        expect(Promise.resolve('success')).to.rejected
    })
})

我试图测试一个应该被拒绝的承诺，测试应该失败，但测试成功了

Answer 1

摘自Chai as Promised 文档

您可以使用 async /await 或 .then(() => {}) 在测试中包含多个 Promise。

这四个测试将失败：

const { describe, it } = require('mocha');
const chai = require('chai');
const { expect } = require('chai');
const chaiAsPromised = require('chai-as-promised');

chai.use(chaiAsPromised);

describe('test', () => {
  it('must be rejected (1)', () => {
    return expect(Promise.resolve('success')).to.eventually.be.rejected;
  });

  it('must be rejected (2)', (done) => {
    expect(Promise.resolve('success')).to.eventually.be.rejected.notify(done);
  });

  it('must be rejected (3)', async () => {
    await expect(Promise.resolve('success1')).to.eventually.be.fulfilled;
    return expect(Promise.resolve('success2')).to.eventually.be.rejected;
  });

  it('must be rejected (4)', () => {
    return expect(Promise.resolve('success1')).to.eventually.be.fulfilled.then(
      () => expect(Promise.resolve('success2')).to.eventually.be.rejected
    );
  });
});

实例：https://stackblitz.com/edit/node- a7t3tx?file=index.js