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Created May 26, 2017 11:00
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JS Bin javascript-redux-writing-a-todo-list-reducer-toggling-a-todo // source https://jsbin.com/bobitif
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta name="description" content="javascript-redux-reducer-composition-with-arrays">
<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-reducer-composition-with-arrays
'use strict';
var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
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 todo = function todo(state, action) {
switch (action.type) {
case 'ADD_TODO':
return {
id: action.id,
text: action.text,
completed: false
};
case 'TOGGLE_TODO':
if (state.id !== action.id) {
return state;
}
return _extends({}, state, {
completed: !state.completed
});
// ==> Object.assign({}, todo, {completed: !todo.completed})
default:
return state;
}
};
var todos = function todos(state, action) {
if (state === undefined) state = [];
switch (action.type) {
case 'ADD_TODO':
return [].concat(_toConsumableArray(state), [todo(undefined, action)]);
case 'TOGGLE_TODO':
return state.map(function (t) {
return todo(t, action);
});
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);
};
var testToggleTodo = function testToggleTodo() {
var stateBefore = [{
id: 0,
text: 'Learn Redux',
completed: false
}, {
id: 1,
text: 'Go Redux',
completed: false
}];
var action = {
type: 'TOGGLE_TODO',
id: 1
};
var stateAfter = [{
id: 0,
text: 'Learn Redux',
completed: false
}, {
id: 1,
text: 'Go Redux',
completed: true
}];
Object.freeze(stateBefore);
Object.freeze(action);
expect(todos(stateBefore, action)).toEqual(stateAfter);
};
testAddTodo();
testToggleTodo();
console.log('Tests Ok!');
</script>
<script id="jsbin-source-javascript" type="text/javascript">// javascript-redux-reducer-composition-with-arrays
const todo = (state, action) => {
switch(action.type){
case 'ADD_TODO':
return {
id: action.id,
text: action.text,
completed: false
};
case 'TOGGLE_TODO':
if(state.id !== action.id){
return state;
}
return {
...state,
completed: !state.completed
};
// ==> Object.assign({}, todo, {completed: !todo.completed})
default:
return state;
}
};
const todos = (state = [], action) => {
switch(action.type){
case 'ADD_TODO':
return [
...state,
todo(undefined, action)
];
case 'TOGGLE_TODO':
return state.map(t => todo(t, action));
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);
};
const testToggleTodo = () => {
const stateBefore = [
{
id: 0,
text: 'Learn Redux',
completed: false
},
{
id: 1,
text: 'Go Redux',
completed: false
}
];
const action = {
type: 'TOGGLE_TODO',
id: 1
};
const stateAfter = [
{
id: 0,
text: 'Learn Redux',
completed: false
},
{
id: 1,
text: 'Go Redux',
completed: true
}
];
Object.freeze(stateBefore);
Object.freeze(action);
expect(
todos(stateBefore, action)
).toEqual(stateAfter);
};
testAddTodo();
testToggleTodo();
console.log('Tests Ok!')
</script></body>
</html>
Raw
jsbin.bobitif.js
// javascript-redux-reducer-composition-with-arrays
'use strict';
var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
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 todo = function todo(state, action) {
switch (action.type) {
case 'ADD_TODO':
return {
id: action.id,
text: action.text,
completed: false
};
case 'TOGGLE_TODO':
if (state.id !== action.id) {
return state;
}
return _extends({}, state, {
completed: !state.completed
});
// ==> Object.assign({}, todo, {completed: !todo.completed})
default:
return state;
}
};
var todos = function todos(state, action) {
if (state === undefined) state = [];
switch (action.type) {
case 'ADD_TODO':
return [].concat(_toConsumableArray(state), [todo(undefined, action)]);
case 'TOGGLE_TODO':
return state.map(function (t) {
return todo(t, action);
});
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);
};
var testToggleTodo = function testToggleTodo() {
var stateBefore = [{
id: 0,
text: 'Learn Redux',
completed: false
}, {
id: 1,
text: 'Go Redux',
completed: false
}];
var action = {
type: 'TOGGLE_TODO',
id: 1
};
var stateAfter = [{
id: 0,
text: 'Learn Redux',
completed: false
}, {
id: 1,
text: 'Go Redux',
completed: true
}];
Object.freeze(stateBefore);
Object.freeze(action);
expect(todos(stateBefore, action)).toEqual(stateAfter);
};
testAddTodo();
testToggleTodo();
console.log('Tests Ok!');
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