freeCodeCamp/curriculum/challenges/chinese/06-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-string-contains-a-substring.md

---
id: 587d824d367417b2b2512c53
title: 测试字符串是否包含子字符串
challengeType: 2
forumTopicId: 301597
dashedName: test-if-a-string-contains-a-substring
---

# --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。

`include()` 和 `notInclude()` 同样可以用于字符串。 `include()` 用于断言字符串中包含某个子字符串。

# --instructions--

在 `tests/1_unit-tests.js` 中，`Strings` 套件里标有 `#14` 的测试下，将每个 `assert` 改成 `assert.include` 或 `assert.notInclude` 方法，通过测试（结果应该返回 `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=13').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：`include` 或 `notInclude`。

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=13').then(
    (data) => {
      assert.equal(
        data.assertions[0].method,
        'include',
        "'Arrow' contains 'row'..."
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

应该为第二个断言选择正确的方法：`include` 或 `notInclude`。

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=13').then(
    (data) => {
      assert.equal(
        data.assertions[1].method,
        'notInclude',
        "... a 'dart' doesn't contain a 'queue'"
      );
    },
    (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.
*/
```