HTTP请求的单元测试返回Promise {<pending>}

时间:2019-02-06 11:06:21

标签: javascript node.js reactjs unit-testing axios

我正在使用axios模拟适配器模拟HTTP请求以测试我的功能。在定义了函数的行为之后,我创建了一个类的实例来调用函数,结果是

**Promise { <pending> }**, 

出什么问题了?如何返回我定义的值?

这是我的代码:

UserService.js

export default class UserService {
  getUserInfo = userId => {
    const params = {
      userId,
    };

    return axios
      .get('https://www.usefortesting.com', {
        params: { userId: params },
      })
      .then(response => response.data.userInfo)
      .catch(error => error);
  };
}

UserService.test.js

import React from 'react';
import axios from 'axios';
import UserService from './UserService';
import MockAdapter from 'axios-mock-adapter';

describe('testing', () => {
  let axiosMock;
  const Info = {
    userInfo: {
      id: '123',
      name: 'omg',
    },
  };
  beforeEach(function() {
    axiosMock = new MockAdapter(axios);
  });

  afterEach(() => {
    axiosMock.reset();
    axiosMock.restore();
  });

  it('testing', () => {
    axiosMock
      .onGet('https://www.usefortesting.com', {
        params: { userId: 'user_1' },
      })
      .reply(200, Info);
    let userService = new UserService();
    let response = userService.getUserInfo('user_1');
    console.log(response);
  });
});

1 个答案:

答案 0 :(得分:1)

您需要等待测试中的回复。如下所示使用回调或异步/等待。
您的测试应如下所示:

@Insert(onConflict = OnConflictStrategy.REPLACE)
void insertAll(User... user);

OR

it('testing', async () => {  // notice async here
  axiosMock
    .onGet('https://www.usefortesting.com', {
      params: { userId: 'user_1' },
    })
    .reply(200, Info);
  let userService = new UserService();
  let response = await userService.getUserInfo('user_1');  // notice await here
  console.log(response);
});

您可以查看Jest文档上的this link以获得更多示例。


您的it('testing', () => { ... userService.getUserInfo('user_1').then(response => { console.log(response); }); }); 方法中也有错误,在参数中,您正在传递getUserInfo()的对象,但您需要传递字符串或整数。您应该做的是:

userId

OR

return axios.get('https://www.usefortesting.com', {
    params: { userId: params.userId },
})...