ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
102 lines
2.4 KiB
Markdown
102 lines
2.4 KiB
Markdown
---
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id: 587d824b367417b2b2512c49
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title: 测试真实性
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challengeType: 2
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videoUrl: ''
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dashedName: test-for-truthiness
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---
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# --description--
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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。
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`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。
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```js
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assert.isTrue(true, '可以通过，因为值的类型是布尔且值为 true');
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assert.isTrue('true', '不能通过，因为值的类型是字符串);
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assert.isTrue(1, '不过能通过，因为值是数字 1');
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```
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`isFalse()` 和 `isNotFalse()` 同样存在，表现与上面提到的两个方法类似。
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# --instructions--
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使用 `assert.isTrue()` 或 `assert.isNotTrue()` 让测试通过。
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# --hints--
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不应有未通过的测试
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
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(data) => {
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assert.equal(data.state, 'passed');
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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请选择正确的断言—isTrue 或 isNotTrue
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
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(data) => {
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assert.equal(data.assertions[0].method, 'isTrue', 'True is true');
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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请选择正确的断言—isTrue 或 isNotTrue
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
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(data) => {
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assert.equal(
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data.assertions[1].method,
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'isTrue',
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'Double negation of a truthy value is true'
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);
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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请选择正确的断言—isTrue 或 isNotTrue
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
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(data) => {
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assert.equal(
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data.assertions[2].method,
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'isNotTrue',
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'A truthy object is not true - neither is a false one'
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);
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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# --solutions--
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```js
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/**
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Backend challenges don't need solutions,
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because they would need to be tested against a full working project.
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Please check our contributing guidelines to learn more.
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*/
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```
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