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Created March 21, 2016 18:44
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JS Bin // source http://jsbin.com/keyewu
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<script src="https://fb.me/react-0.14.7.min.js"></script>
<script src="https://fb.me/react-dom-0.14.7.min.js"></script>
<script src="https://wzrd.in/standalone/expect@latest"></script>
<script src="https://wzrd.in/standalone/deep-freeze@latest"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/redux/3.3.1/redux.min.js"></script>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
</head>
<body>
<div id="root"></div>
<script id="jsbin-javascript">
'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; };
var toggleTodo = function toggleTodo(todo) {
// todo.completed = !todo.completed;
// return todo; // bad - mutates original
// better - but brittle if props change
// return {
// id: todo.id,
// text: todo.text,
// completed: !todo.completed
// };
// best - ES2015 and robust
// won't fail if todo has new props
// return Object.assign({}, todo, {
// completed: !todo.completed
// });
// ES2016/ES7 - experimental Babel stage-2
return _extends({}, todo, {
completed: !todo.completed
});
};
var toggleTodoTest = function toggleTodoTest() {
var todoBefore = {
id: 0,
text: 'Learn Redux',
completed: false
};
var todoAfter = {
id: 0,
text: 'Learn Redux',
completed: true
};
deepFreeze(todoBefore);
expect(toggleTodo(todoBefore)).toEqual(todoAfter);
};
toggleTodoTest();
console.log('All tests pass!');
</script>
<script id="jsbin-source-javascript" type="text/javascript">const toggleTodo = (todo) => {
// todo.completed = !todo.completed;
// return todo; // bad - mutates original
// better - but brittle if props change
// return {
// id: todo.id,
// text: todo.text,
// completed: !todo.completed
// };
// best - ES2015 and robust
// won't fail if todo has new props
// return Object.assign({}, todo, {
// completed: !todo.completed
// });
// ES2016/ES7 - experimental Babel stage-2
return {
...todo,
completed: !todo.completed
};
};
const toggleTodoTest = () => {
const todoBefore = {
id: 0,
text: 'Learn Redux',
completed: false
};
const todoAfter = {
id: 0,
text: 'Learn Redux',
completed: true
};
deepFreeze(todoBefore);
expect(
toggleTodo(todoBefore)
).toEqual(todoAfter)
};
toggleTodoTest();
console.log('All tests pass!');</script></body>
</html>
Raw
jsbin.keyewu.js
'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; };
var toggleTodo = function toggleTodo(todo) {
// todo.completed = !todo.completed;
// return todo; // bad - mutates original
// better - but brittle if props change
// return {
// id: todo.id,
// text: todo.text,
// completed: !todo.completed
// };
// best - ES2015 and robust
// won't fail if todo has new props
// return Object.assign({}, todo, {
// completed: !todo.completed
// });
// ES2016/ES7 - experimental Babel stage-2
return _extends({}, todo, {
completed: !todo.completed
});
};
var toggleTodoTest = function toggleTodoTest() {
var todoBefore = {
id: 0,
text: 'Learn Redux',
completed: false
};
var todoAfter = {
id: 0,
text: 'Learn Redux',
completed: true
};
deepFreeze(todoBefore);
expect(toggleTodo(todoBefore)).toEqual(todoAfter);
};
toggleTodoTest();
console.log('All tests pass!');
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