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

id, title, challengeType, forumTopicId

id	title	challengeType	forumTopicId
587d824d367417b2b2512c52	测试某个值是否为字符串	2	301599

--description--

请注意，本项目在 这个 Repl.it 项目 的基础上进行开发。你也可以从 GitHub 上克隆。

isString 或 isNotString 断言一个值是否为字符串。

--instructions--

使用 assert.isString() 或 assert.isNotString() 让所有测试通过。

--hints--

不应有未通过的测试

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=12').then(
    (data) => {
      assert.equal(data.state, 'passed');
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

请选择正确的断言—isString 或 isNotString

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=12').then(
    (data) => {
      assert.equal(
        data.assertions[0].method,
        'isNotString',
        'A float number is not a string'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

请选择正确的断言—isString 或 isNotString

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=12').then(
    (data) => {
      assert.equal(
        data.assertions[1].method,
        'isString',
        'environment vars are strings (or undefined)'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

请选择正确的断言—isString 或 isNotString

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=12').then(
    (data) => {
      assert.equal(data.assertions[2].method, 'isString', 'A JSON is a string');
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

--solutions--