TypeError：无法读取未定义[JWT / Nestjs / e2e测试]的属性'sign'

如何解决TypeError：无法读取未定义[JWT / Nestjs / e2e测试]的属性'sign'

我需要为我的e2e测试生成一个Jwt Bearer令牌。 由于该过程有点繁琐，并且由于这不是我要测试的内容，因此我想直接获取而不是通过2FA实际过程来跳过它。

不幸的是，我不断收到以下错误消息：

 TypeError: Cannot read property 'sign' of undefined

      150 |
      151 |     function getBearerToken(candidateId: number) {
    > 152 |       return jwtService.sign({ sub: candidateId.toString() })
          |                         ^
      153 |     }
      154 |   })
      155 | })

      at getBearerToken (app.e2e-spec.ts:152:25)
      at Object.<anonymous> (app.e2e-spec.ts:127:21)

describe('Bookmarks Module',() => {
    let bearerToken: string
    let jwtService: JwtService

    beforeEach(() => {
      bearerToken = getBearerToken(1)
      jwtService = new JwtService({
        secret: process.env.JWT_SECRET,signoptions: { expiresIn: '1h' },})
    })

    test('/v1/bookmarks/ (GET) [auth]',() => {
      return expectCorrectAuthenticatedGetResponse(
        `${V1_PREFIX}/bookmarks/`,bearerToken
      )
    })

    test('/v1/bookmarks/{id} (POST) [auth]',() => {
      const DATA = { offerId: 19 }
      return expectCorrectAuthenticatedPostResponse(
        `${V1_PREFIX}/bookmarks/${DATA.offerId}`,DATA,bearerToken
      )
    })

    function getBearerToken(candidateId: number) {
      return jwtService.sign({ sub: candidateId.toString() })
    }
  })

解决方法

在jwtService.sign()初始化之前，您在getBearerToken()中调用beforeEach()，而jwtService本身在jwtService中被调用。因此，undefined在您尝试使用时仍为beforeEach()。您应该反转 beforeEach(() => { jwtService = new JwtService({ secret: process.env.JWT_SECRET,signOptions: { expiresIn: '1h' },}) bearerToken = getBearerToken(1) }) 中的行：

    List<String> cutsomList = ....
    Foo mock = Mockito.mock(Foo.class);
    Mockito.when(mock.getItems()).thenReturn(customList);
    Mockito.when(mock.process()).thenCallRealMethod();