freeCodeCamp/curriculum/challenges/chinese/06-quality-assurance/quality-assurance-and-testing-with-chai/compare-the-properties-of-two-elements.md

---
id: 587d824c367417b2b2512c4d
title: 比较两个元素的属性
challengeType: 2
forumTopicId: 301588
dashedName: compare-the-properties-of-two-elements
---

# --description--

请注意，本项目在 [这个 Repl.it 项目](https://repl.it/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。

# --instructions--

在 `tests/1_unit-tests.js` 中，在标有 `#8` 的 `Comparisons` 套件里，将每个 `assert` 改成 `assert.isAbove` 或 `assert.isAtMost` 方法，让测试通过（结果应该返回 `true`）。 不要改变传入断言的参数。

# --hints--

不应有未通过的测试

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=7').then(
    (data) => {
      assert.equal(data.state, 'passed');
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

请为第一个断言选择正确的方法 — `isAbove` 或 `isAtMost`。

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=7').then(
    (data) => {
      assert.equal(
        data.assertions[0].method,
        'isAtMost',
        '5 is at most (<=) 5'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

请为第二个断言选择正确的方法 — `isAbove` 或 `isAtMost`。

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=7').then(
    (data) => {
      assert.equal(data.assertions[1].method, 'isAbove', '1 is greater than 0');
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

请为第三个断言选择正确的方法 — `isAbove` 或 `isAtMost`。

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=7').then(
    (data) => {
      assert.equal(
        data.assertions[2].method,
        'isAbove',
        'Math.PI = 3.14159265 is greater than 3'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

请为第四个断言选择正确的方法 — `isAbove` 或 `isAtMost`。

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=7').then(
    (data) => {
      assert.equal(
        data.assertions[3].method,
        'isAtMost',
        '1 - Math.random() is > 0 and <= 1. It is atMost 1 !'
      );
    },
    (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.
*/
```