我如何在酶测试中使用'it'的结果？

Question

it('should call api createUserWithEmailAndPassword', result => {
    expect(result).toEqual(call([authMock, createUserWithEmailAndPassword], actionMock.user.email, actionMock.user.passwd))
    return {
         user: {
             user: {
                 uid: undefined
             }
         }
    }       
})
const pathUser = `users/`+{user:{user:{uid:undefined}}} //i need to take a result of 'should call api createUserWithEmailAndPassword' to use here

如何将user.user.uid放入pathUser中？ 在我的代码sagas中，我有：

const user = yield call([auth, createUserWithEmailAndPassword], email, passwd)

    const pathUser = `users/${user.user.uid}`
...
yield database.ref(pathUser).update(newCadaster)