nock和Redux操作测试-模拟存储错误

Question

我刚开始进行redux测试，并且一直在尝试支持一个应用程序的填充测试，如果这是使用nock和redux模拟商店进行测试的完全错误的话，我非常抱歉。

//Action in authAction.js
export function fetchMessage() {
  return function(dispatch) {
    axios.get(ROOT_URL, {
      headers: { authorization: localStorage.getItem('token') }
    })
      .then(response => {
        console.log("hi")
        dispatch({
          type: FETCH_MESSAGE,
          payload: response.data.message
        });
      })
      .catch(response => {
        console.log(response)
        //callingRefresh(response,"/feature",dispatch);
      });
  }
}

这就是方法，它似乎正在被调用，但通常会转到标题不匹配的nock失败原因的捕捉原因。

//authActions_test.js
import nock from 'nock'
import React from 'react'
import {expect} from 'chai'
import configureMockStore from 'redux-mock-store'
import thunk from 'redux-thunk'

const middlewares = [ thunk ]
const mockStore = configureMockStore(middlewares)

import * as actions from '../../src/actions/authActions';
const ROOT_URL = 'http://localhost:3090';

describe('actions', () => {

    beforeEach(() => {
        nock.disableNetConnect();
        localStorage.setItem("token", '12345');
    });

    afterEach(() => {
        nock.cleanAll();
        nock.enableNetConnect();
    });


  describe('feature', () => {

    it('has the correct type', () => {
      var scope = nock(ROOT_URL).get('/',{reqheaders: {'authorization': '12345'}}).reply(200,{ message: 'Super secret code is ABC123' });
      const store = mockStore({ message: '' });

      store.dispatch(actions.fetchMessage()).then(() => {
      const actions = store.getStore()
      expect(actions.message).toEqual('Super secret code is ABC123');
    })


    });
  });
});

即使头被移除，nock也会拦截调用。我每次都会收到这个错误

TypeError: Cannot read property 'then' of undefined
  at Context.<anonymous> (test/actions/authActions_test.js:43:24)

Answer 1

您不会从axios返回链接then调用的承诺。

将雷声改为：

//Action in authAction.js
export function fetchMessage() {
  return function(dispatch) {
    return axios.get(ROOT_URL, {
      headers: { authorization: localStorage.getItem('token') }
    })
      .then(response => {
        console.log("hi")
        dispatch({
          type: FETCH_MESSAGE,
          payload: response.data.message
        });
      })
      .catch(response => {
        console.log(response)
        //callingRefresh(response,"/feature",dispatch);
      });
  }
}

您还可能需要更改测试，以便在承诺解决之前不会通过测试。如何进行此更改取决于所使用的测试库。如果你在使用摩卡，看看this answer。

附带注意:我不确定您是否有其他单元测试单独测试动作创建者到还原器，但这是一个非常完整的方法来测试这些。Redux最大的优点之一是，机器上的每一个分离的齿轮都能很容易地彼此隔离测试。