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>
70 lines
1.6 KiB
Markdown
70 lines
1.6 KiB
Markdown
---
|
|
id: 587d824a367417b2b2512c46
|
|
title: 了解 JavaScript 断言是如何使用的
|
|
challengeType: 2
|
|
forumTopicId: 301589
|
|
dashedName: learn-how-javascript-assertions-work
|
|
---
|
|
|
|
# --description--
|
|
|
|
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。
|
|
|
|
# --instructions--
|
|
|
|
使用 assert.isNull() 或 assert.isNotNull() 来让测试通过。
|
|
|
|
# --hints--
|
|
|
|
不应有未通过的测试
|
|
|
|
```js
|
|
(getUserInput) =>
|
|
$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=0').then(
|
|
(data) => {
|
|
assert.equal(data.state, 'passed');
|
|
},
|
|
(xhr) => {
|
|
throw new Error(xhr.responseText);
|
|
}
|
|
);
|
|
```
|
|
|
|
请选择正确的断言—isNull 或 isNotNull
|
|
|
|
```js
|
|
(getUserInput) =>
|
|
$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=0').then(
|
|
(data) => {
|
|
assert.equal(data.assertions[0].method, 'isNull', 'Null is null');
|
|
},
|
|
(xhr) => {
|
|
throw new Error(xhr.responseText);
|
|
}
|
|
);
|
|
```
|
|
|
|
You should choose the right assertion - isNull vs. isNotNull.
|
|
|
|
```js
|
|
(getUserInput) =>
|
|
$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=0').then(
|
|
(data) => {
|
|
assert.equal(data.assertions[1].method, 'isNotNull', '1 is not null');
|
|
},
|
|
(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.
|
|
*/
|
|
```
|