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May 26, 2017 10:00
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JS Bin javascript-redux-writing-a-todo-list-reducer-adding-a-todo // source https://jsbin.com/bobitif
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta name="description" content="javascript-redux-writing-a-todo-list-reducer-adding-a-todo"> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <script src="https://unpkg.com/expect/umd/expect.min.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/redux/3.6.0/redux.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/freezer-js/0.12.1/freezer.js"></script> | |
| <script src="https://fb.me/react-15.1.0.js"></script> | |
| <script src="https://fb.me/react-dom-15.1.0.js"></script> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <div id="root"></div> | |
| <script id="jsbin-javascript"> | |
| // javascript-redux-writing-a-todo-list-reducer-adding-a-todo | |
| 'use strict'; | |
| function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } } | |
| var todos = function todos(state, action) { | |
| if (state === undefined) state = []; | |
| switch (action.type) { | |
| case 'ADD_TODO': | |
| return [].concat(_toConsumableArray(state), [{ | |
| id: action.id, | |
| text: action.text, | |
| completed: false | |
| }]); | |
| default: | |
| return state; | |
| } | |
| }; | |
| var testAddTodo = function testAddTodo() { | |
| var stateBefore = []; | |
| var action = { | |
| type: 'ADD_TODO', | |
| id: 0, | |
| text: 'Learn Redux' | |
| }; | |
| var stateAfter = [{ | |
| id: 0, | |
| text: 'Learn Redux', | |
| completed: false | |
| }]; | |
| Object.freeze(stateBefore); | |
| Object.freeze(action); | |
| expect(todos(stateBefore, action)).toEqual(stateAfter); | |
| }; | |
| testAddTodo(); | |
| console.log('Tests Ok!'); | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">// javascript-redux-writing-a-todo-list-reducer-adding-a-todo | |
| const todos = (state = [], action) => { | |
| switch(action.type){ | |
| case 'ADD_TODO': | |
| return [ | |
| ...state, | |
| { | |
| id: action.id, | |
| text: action.text, | |
| completed: false | |
| } | |
| ]; | |
| default: | |
| return state; | |
| } | |
| }; | |
| const testAddTodo = () => { | |
| const stateBefore = []; | |
| const action = { | |
| type: 'ADD_TODO', | |
| id: 0, | |
| text: 'Learn Redux' | |
| }; | |
| const stateAfter = [ | |
| { | |
| id: 0, | |
| text: 'Learn Redux', | |
| completed: false | |
| } | |
| ]; | |
| Object.freeze(stateBefore); | |
| Object.freeze(action); | |
| expect( | |
| todos(stateBefore, action) | |
| ).toEqual(stateAfter); | |
| }; | |
| testAddTodo(); | |
| console.log('Tests Ok!') | |
| </script></body> | |
| </html> |
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| // javascript-redux-writing-a-todo-list-reducer-adding-a-todo | |
| 'use strict'; | |
| function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } } | |
| var todos = function todos(state, action) { | |
| if (state === undefined) state = []; | |
| switch (action.type) { | |
| case 'ADD_TODO': | |
| return [].concat(_toConsumableArray(state), [{ | |
| id: action.id, | |
| text: action.text, | |
| completed: false | |
| }]); | |
| default: | |
| return state; | |
| } | |
| }; | |
| var testAddTodo = function testAddTodo() { | |
| var stateBefore = []; | |
| var action = { | |
| type: 'ADD_TODO', | |
| id: 0, | |
| text: 'Learn Redux' | |
| }; | |
| var stateAfter = [{ | |
| id: 0, | |
| text: 'Learn Redux', | |
| completed: false | |
| }]; | |
| Object.freeze(stateBefore); | |
| Object.freeze(action); | |
| expect(todos(stateBefore, action)).toEqual(stateAfter); | |
| }; | |
| testAddTodo(); | |
| console.log('Tests Ok!'); |
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