Question

我跟随this egghead tutorial并在控制台中收到错误：

"ReferenceError: expect is not defined
    at testToggleTodo (myproj.js:18:3)
    at myproj.js:25:1
    at https://static.jsbin.com/js/prod/runner-4.0.4.min.js:1:13850
    at https://static.jsbin.com/js/prod/runner-4.0.4.min.js:1:10792"

我的HTML ：

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>

  <script src="https://wzrd.in/standalone/expect@latest"></script>
  <script src="https://wzrd.in/standalone/deep-freeze@latest"></script>

  </head>
<body>

</body>
</html>

ES6 / Babel ：

const toggleTodo = (todo) => {
  todo.completed = !todo.completed;
  return todo;
};

const testToggleTodo = () => {
  const todoBefore = {
    id: 0,
    text: 'Learn Redux',
    completed: false
  };
  const todoAfter = {
    id: 0,
    text: 'Learn Redux',
    completed: true
  };

  expect(
    toggleTodo(todoBefore)
  ).toEqual(todoAfter);
};

testToggleTodo();
console.log('All Tests Passed.');

您可以在我的HTML的expect中看到我已导入head：

<script src="https://wzrd.in/standalone/expect@latest"></script>

为什么我仍然收到错误？我在这里缺少什么？

感谢。

如何解决：＆＃34; ReferenceError：expect未定义

0 个答案: