---
id: 587d824b367417b2b2512c4a
title: 用两个等号断言相等
challengeType: 2
forumTopicId: 301609
dashedName: use-the-double-equals-to-assert-equality
---

# --description--

请注意，本项目在[这个 Replit 项目](https://replit.com/github/freeCodeCamp/boilerplate-mochachai)的基础上进行开发。你也可以从 [GitHub](https://repl.it/github/freeCodeCamp/boilerplate-mochachai) 上克隆。

`equal()` 使用 `==` 比较对象。

# --instructions--

在 `tests/1_unit-tests.js` 中，在 `Equality` 套件里标有 `#5` 的测试里，将每个 `assert` 改为 `assert.equal` 或 `assert.notEqual`，通过测试（应该返回 `true`）。 不要修改传给断言的参数。

# --hints--

应通过所有测试。

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=4').then(
    (data) => {
      assert.equal(data.state, 'passed');
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

应该为第一个断言选择正确的方法：`equal` 或 `notEqual`。

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=4').then(
    (data) => {
      assert.equal(
        data.assertions[0].method,
        'equal',
        'Numbers are coerced into strings with == '
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

应该为第二个断言选择正确的方法：`equal` 或 `notEqual`。

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=4').then(
    (data) => {
      assert.equal(
        data.assertions[1].method,
        'notEqual',
        ' == compares object references'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

应该为第三个断言选择正确的方法：`equal` 或 `notEqual`。

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=4').then(
    (data) => {
      assert.equal(
        data.assertions[2].method,
        'equal',
        "6 * '2' is 12 ! It should be equal to '12'"
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

应该为第四个断言选择正确的方法：`equal` 或 `notEqual`。

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=4').then(
    (data) => {
      assert.equal(data.assertions[3].method, 'notEqual', "6 + '2' is '62'...");
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

# --solutions--

```js
/**
  Backend challenges don't need solutions, 
  because they would need to be tested against a full working project. 
  Please check our contributing guidelines to learn more.
*/
```
