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

2.3 KiB

id title challengeType forumTopicId dashedName
587d824d367417b2b2512c52 测试某个值是否为字符串 2 301599 test-if-a-value-is-a-string

--description--

请注意,本项目在这个 Replit 项目的基础上进行开发。你也可以从 GitHub 上克隆。

isStringisNotString 断言一个值是否为字符串。

--instructions--

tests/1_unit-tests.js 中,Strings 套件里标有 #13 的测试下,将每个 assert 改成 assert.isStringassert.isNotString 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。

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=12').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:isStringisNotString

(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);
    }
  );

应该为第二个断言选择正确的方法:isStringisNotString

(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);
    }
  );

应该为第三个断言选择正确的方法:isStringisNotString

(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--

/**
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  because they would need to be tested against a full working project. 
  Please check our contributing guidelines to learn more.
*/