freeCodeCamp/curriculum/challenges/chinese/06-quality-assurance/quality-assurance-and-testi.../test-for-truthiness.md

2.7 KiB

id title challengeType forumTopicId dashedName
587d824b367417b2b2512c49 测试真实性 2 301596 test-for-truthiness

--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。

isTrue() 仅当给出的值为 Boolean 的 true 时可以通过测试;isNotTrue() 则会在给出除 true 以外的值时通过测试。

assert.isTrue(true, 'this will pass with the boolean value true');
assert.isTrue('true', 'this will NOT pass with the string value "true"');
assert.isTrue(1, 'this will NOT pass with the number value 1');

isFalse()isNotFalse() 同样存在,与上面提到的两个方法类似,只不过它们针对值为 false 的布尔值。

--instructions--

tests/1_unit-tests.js 中,Basic Assertions 套件中标注为 #4 的测试下,修改每个 assertassert.isTrueassert.isNotTrue,通过测试(结果应为 true)。 不要修改传入断言的参数。

--hints--

应通过所有测试。

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').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:isTrueisNotTrue

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
    (data) => {
      assert.equal(data.assertions[0].method, 'isTrue', 'True is true');
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

应该为第二个断言选择正确的方法:isTrueisNotTrue

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
    (data) => {
      assert.equal(
        data.assertions[1].method,
        'isTrue',
        'Double negation of a truthy value is true'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

应该为第三个断言选择正确的方法:isTrueisNotTrue

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
    (data) => {
      assert.equal(
        data.assertions[2].method,
        'isNotTrue',
        'A truthy object is not true - neither is a false one'
      );
    },
    (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.
*/