html JS Bin //来源http://jsbin.com/muqigog

Posted 2021-05-11

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console.clear()

const toggleTodo = todo => {
//   Spread operator on object is avaible in ES7
  return {
    ...todo,
    completed: !todo.completed
  }
//   return Object.assign({}, todo, {
//     completed: !todo.completed
//   })
}

const testToggleTodo = () => {
  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)
}

testToggleTodo()

console.log('All test passed.')

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/expect/1.20.2/expect.min.js"></script>
  <script src="https://wzrd.in/standalone/deep-freeze@latest"></script>
<script id="jsbin-javascript">
console.clear()

const toggleTodo = todo => {
//   Spread operator on object is avaible in ES7
  return {
    ...todo,
    completed: !todo.completed
  }
//   return Object.assign({}, todo, {
//     completed: !todo.completed
//   })
}

const testToggleTodo = () => {
  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)
}

testToggleTodo()

console.log('All test passed.')
</script>



<script id="jsbin-source-javascript" type="text/javascript">console.clear()

const toggleTodo = todo => {
//   Spread operator on object is avaible in ES7
  return {
    ...todo,
    completed: !todo.completed
  }
//   return Object.assign({}, todo, {
//     completed: !todo.completed
//   })
}

const testToggleTodo = () => {
  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)
}

testToggleTodo()

console.log('All test passed.')</script></body>
</html>

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