开玩笑 toEqual 不适用于异常匹配答案

【问题标题】：jest toEqual not working with exception matching开玩笑 toEqual 不适用于异常匹配
【发布时间】：2019-07-08 06:44:26
【问题描述】：

我是jest 的新手，所以我不确定是不是我的错。所以这是我的测试用例

    it('should throw error if wrong email or phone number is provided', async () => {
      await expect(userService.verifyCredentials('invalidemail@invaliddomain.com', 'sayantan94'))
        .rejects
        .toEqual(new UnauthorizedException('Invalid email or phone number'));
    })

但是即使抛出了相同的异常，它也会失败。这是输出

FAIL  src/modules/user/user.service.spec.ts (5.156s)
● UserService › verifyCredentials › should throw error if wrong email or phone number is provided

expect(received).toStrictEqual(expected)

Expected value to equal:
  [Error: [object Object]]
Received:
  [Error: [object Object]]

Difference:

Compared values have no visual difference.

  88 |       await expect(userService.verifyCredentials('invalidemail@invaliddomain.com', 'sayantan94'))
  89 |         .rejects
> 90 |         .toEqual(new UnauthorizedException('Invalid email or phone number'));
     |          ^
  91 |     })
  92 |   })
  93 |

如何检查？

【问题讨论】：

标签： node.js testing jestjs nestjs

【解决方案1】：

代替toEqual 试试toThrow

it('should throw error if wrong email or phone number is provided', async () =>  {        
    await expect(userService.verifyCredentials('invalidemail@invaliddomain.com', 'sayantan94'))
    .rejects
    .toThrow('Invalid email or phone number');
});

参考：https://jestjs.io/docs/en/expect.html#rejects

【讨论】：