Question

所以我认为我创建了一个简单的测试来确认我的redux减少器的mocha / chai测试设置，但是这个初始测试由于我无法辨别的原因而失败。一切都是根据babel docs设置的。没有与es6相关的错误。

文件结构

client
|-reducers
|    |-auth_reducer.js
|
test
|-reducers
|    |-auth.test.js

测试脚本
mocha --compilers js:babel-register --require babel-polyfill --recursive

Auth Reducer

const AUTH_USER = 'AUTH_USER';
const INITIAL_STATE = { error: '', message: '', content: '', authenticated: false, user: null };

export default function (state = INITIAL_STATE, action) {
  switch (action.type) {
    case AUTH_USER:
      return { ...state, error: '', message: '', authenticated: true };
  }
  return state;
}

验证测试

import { expect } from 'chai';

import authReducer from '../../client/reducers/auth_reducer';

describe('auth_reducer', () => {

  it('handles AUTH_USER', () => {
    const initialState = { 
      error: '', 
      message: '', 
      content: '', 
      authenticated: false, 
      user: null 
    };
    const action = {
      type: 'AUTH_USER',
    };
    const nextState = authReducer(initialState, action);

    expect(nextState).to.equal({
      error: '', 
      message: '', 
      content: '', 
      authenticated: true, 
      user: null
    });
  });
});

错误

auth_reducer
    1) handles AUTH_USER

  0 passing (38ms)
  1 failing

  1) auth_reducer handles AUTH_USER:

      AssertionError: expected { Object (error, message, ...) } to equal { Object (error, message, ...) }
      + expected - actual

      at Context.<anonymous> (test/reducers/auth.test.js:20:26)

npm ERR! Darwin 15.6.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "test"
npm ERR! node v6.7.0
npm ERR! npm  v3.10.9
npm ERR! code ELIFECYCLE
npm ERR! yars@0.0.1 test: `mocha --compilers js:babel-register --require babel-polyfill --recursive`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the yars@0.0.1 test script 'mocha --compilers js:babel-register --require babel-polyfill --recursive'.

Answer 1

使用deep.equal代替equal：

expect(nextState).to.deep.equal({
  error: '', 
  message: '', 
  content: '', 
  authenticated: true, 
  user: null
});

当您对对象进行浅层比较时，对象＆＃39;比较参考。使用深度比较时，会比较属性和值。

一个简单的例子：

＆＃13;

const a = { val1: 1, val2: 2 };
const b = { val1: 1, val2: 2 };

console.log('equality ', a === b);

console.log('deep equality ', a.val1 === b.val1 && a.val2 === b.val2);

＆＃13;

为什么Mocha测试redux减速机失败了？

1 个答案: