Question

我要

 Expected value to equal:

  [{"id": 1, "text": "Run the tests"}, {"id": 0, "text": "Use Redux"}]

Received:
  [{"id": 0, "text": "Use Redux"}, {"id": 1, "text": "Run the tests"}]

我不太了解如何使减速器通过测试。我引用了各种github项目，以对测试有更好的了解。我不确定该如何做才能通过测试。这就是我所拥有的。

我使用玩笑进行测试。

actions / actions.js

let nextTodoId = 0;

export const addPost = text => ({
  type: 'ADD_POST',
  id: nextTodoId++,
  text
})

reducers / myPosts

    const initialState = [
      {
        text: 'Use Redux',
        id: 0
      }
    ]



    const myPosts = (state = initialState, action) => {

      switch(action.type){
        case 'ADD_POST':
          const post = {
            id:state.reduce((maxId, post) => Math.max(post.id, maxId), -1) + 1,
            text:action.text,

          }
          return [...state, post];


        default:
          return state
      }

    }

    export default myPosts

测试 /reducers.js

import { addPost } from '../actions/actions';
import myPosts from '../reducers/myPosts';
import uuid from 'uuid';
describe('myPosts myPosts', () => {
  it('should return the initial state', () => {
    expect(myPosts(undefined, {})).toEqual([
      {
        text: 'Use Redux',
        id: 0
      }
    ])
  })
  it('should handle ADD_POST', () => {
    expect(
      myPosts([], {
        type: 'ADD_POST',
        text: 'Run the tests'
      })
    ).toEqual([
      {
        text: 'Run the tests',
        id: 0
      }
    ])
    expect(
      myPosts(
        [
          {
            text: 'Use Redux',
            id: 0
          }
        ],
        {
          type: 'ADD_POST',
          text: 'Run the tests',
          id:0
        }
      )
    ).toEqual([
      {
        text: 'Run the tests',
        id: 1
      },
      {
        text: 'Use Redux',
        id: 0
      }
    ])
  })
})

Answer 1

问题是您在添加新帖子之前先扩展了以前的状态...

将减速器更改为此：

/anaconda3/lib/python3.6/site-packages/keras/layers/core.py in call(self, inputs, mask)
    691         if has_arg(self.function, 'mask'):
    692             arguments['mask'] = mask
--> 693         return self.function(inputs, **arguments)
    694 
    695     def compute_mask(self, inputs, mask=None):

/anaconda3/lib/python3.6/site-packages/keras/layers/core.py in <lambda>(x)
    334 print('gates_shape', gates_shape)
    335 for ii, kk in enumerate(prms.label_cols):
--> 336     slicer = Lambda(lambda x: x[:,:,:,ii:ii+1], 
    337                     output_shape=gates_shape[:-2]+(1,),
    338                     name='slice_'+kk)

NameError: name 'ii' is not defined

您编写的方式...新帖子放置在状态数组的末尾。如果您希望新帖子首先出现，将解决此问题。

Redux Jest没有获得预期的价值

1 个答案: