70 lines
2.3 KiB
Markdown
70 lines
2.3 KiB
Markdown
|
---
|
||
|
|
id: 5a24c314108439a4d4036157
|
||
|
|
title: Write a Counter with Redux
|
||
|
|
challengeType: 6
|
||
|
|
isRequired: false
|
||
|
|
videoUrl: ''
|
||
|
|
localeTitle: ''
|
||
|
|
---
|
||
|
|
|
||
|
|
## Description
|
||
|
|
undefined
|
||
|
|
|
||
|
|
## Instructions
|
||
|
|
undefined
|
||
|
|
|
||
|
|
## Tests
|
||
|
|
<section id='tests'>
|
||
|
|
|
||
|
|
```yml
|
||
|
|
tests:
|
||
|
|
- text: يجب أن يقوم <code>incAction</code> منشئ الإجراء بإرجاع كائن تصرف <code>type</code> يساوي قيمة <code>INCREMENT</code>
|
||
|
|
testString: 'assert(incAction().type ===INCREMENT, "The action creator <code>incAction</code> should return an action object with <code>type</code> equal to the value of <code>INCREMENT</code>");'
|
||
|
|
- text: ''
|
||
|
|
testString: 'assert(decAction().type === DECREMENT, "The action creator <code>decAction</code> should return an action object with <code>type</code> equal to the value of <code>DECREMENT</code>");'
|
||
|
|
- text: ''
|
||
|
|
testString: 'assert(store.getState() === 0, "The Redux store should initialize with a <code>state</code> of 0.");'
|
||
|
|
- text: ''
|
||
|
|
testString: 'assert((function() { const initialState = store.getState(); store.dispatch(incAction()); const incState = store.getState(); return initialState + 1 === incState })(), "Dispatching <code>incAction</code> on the Redux store should increment the <code>state</code> by 1.");'
|
||
|
|
- text: ''
|
||
|
|
testString: 'assert((function() { const initialState = store.getState(); store.dispatch(decAction()); const decState = store.getState(); return initialState - 1 === decState })(), "Dispatching <code>decAction</code> on the Redux store should decrement the <code>state</code> by 1.");'
|
||
|
|
- text: ''
|
||
|
|
testString: 'assert(typeof counterReducer === "function", "<code>counterReducer</code> should be a function");'
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
## Challenge Seed
|
||
|
|
<section id='challengeSeed'>
|
||
|
|
|
||
|
|
<div id='jsx-seed'>
|
||
|
|
|
||
|
|
```jsx
|
||
|
|
const INCREMENT = null; // define a constant for increment action types
|
||
|
|
const DECREMENT = null; // define a constant for decrement action types
|
||
|
|
|
||
|
|
const counterReducer = null; // define the counter reducer which will increment or decrement the state based on the action it receives
|
||
|
|
|
||
|
|
const incAction = null; // define an action creator for incrementing
|
||
|
|
|
||
|
|
const decAction = null; // define an action creator for decrementing
|
||
|
|
|
||
|
|
const store = null; // define the Redux store here, passing in your reducers
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
## Solution
|
||
|
|
<section id='solution'>
|
||
|
|
|
||
|
|
```js
|
||
|
|
// solution required
|
||
|
|
```
|
||
|
|
</section>
|