javascript - 测试函数不能同时接受 'done' 回调

Question

我正在尝试使用nestjs创建一个简单的测试，但我收到了这个错误

Test functions cannot both take a 'done' callback and return something. Either use a 'done' callback, or return a promise.

Returned value: Promise {}

单元测试很简单，但是当我使用 done(); 时出现错误。

it('throws an error if user signs up with email that is in use', async (done) => {
fakeUsersService.find = () => Promise.resolve([{ id: 1, email: 'a', password: '1' } as User]);
try {
  await service.signup('asdf@asdf.com', 'asdf');
} catch (err) {
  done();
}
});

Answer 1

您正在结合 Async/Await 和 Done。
要么使用 asnyc/await，要么完成。

it('throws an error if user signs up with email that is in use', async () => {
    try {
        await service();
        expect(...);
    } catch (err) {
    }
});

或使用 done 格式

it('throws an error if user signs up with email that is in use', (done) => {
    ...
    service()
     .then( ...) {}
     .catch( ...) {}
    }
    done();
});