2018-10-10 22:03:03 +00:00
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---
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id: 587d824b367417b2b2512c48
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2021-03-22 13:52:28 +00:00
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title: 使用 Assert.isOk() 和 Assert.isNotOK()
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2018-10-10 22:03:03 +00:00
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challengeType: 2
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2020-09-17 10:50:23 +00:00
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forumTopicId: 301607
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2021-01-13 02:31:00 +00:00
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dashedName: use-assert-isok-and-assert-isnotok
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2018-10-10 22:03:03 +00:00
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---
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2020-12-16 07:37:30 +00:00
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# --description--
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2021-03-22 13:52:28 +00:00
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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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2020-09-17 10:50:23 +00:00
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2021-03-22 13:52:28 +00:00
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`isOk()` 用来测试值是否为真值,`isNotOk()` 用来测试值是否为假值。
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2021-02-06 04:42:36 +00:00
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2021-03-22 13:52:28 +00:00
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可以在[过滤数组中的假值](https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/basic-algorithm-scripting/falsy-bouncer)这个挑战中了解更多关于真值和假值的信息。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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# --instructions--
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2020-09-17 10:50:23 +00:00
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2021-03-22 13:52:28 +00:00
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在 `tests/1_unit-tests.js` 中,`Basic Assertions` 套件中标注为 `#3` 的测试下,修改每个 `assert` 为 `assert.isOk()` 或 `assert.isNotOk()`,通过测试(结果应为 `true`)。 不要修改传入断言的参数。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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# --hints--
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2018-10-10 22:03:03 +00:00
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2021-03-22 13:52:28 +00:00
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应通过所有测试。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=2').then(
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(data) => {
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assert.equal(data.state, 'passed');
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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2018-10-10 22:03:03 +00:00
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```
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2021-03-22 13:52:28 +00:00
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应该第一个断言选择正确的方法:`isOk` 或 `isNotOk`。
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2020-12-16 07:37:30 +00:00
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=2').then(
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(data) => {
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assert.equal(data.assertions[0].method, 'isNotOk', 'Null is falsy');
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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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2018-10-10 22:03:03 +00:00
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2021-03-22 13:52:28 +00:00
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应该第二个断言选择正确的方法:`isOk` 或 `isNotOk`。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=2').then(
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(data) => {
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assert.equal(data.assertions[1].method, 'isOk', 'A string is truthy');
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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2018-10-10 22:03:03 +00:00
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2021-03-22 13:52:28 +00:00
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应该第三个断言选择正确的方法:`isOk` 或 `isNotOk`。
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2018-10-10 22:03:03 +00:00
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```js
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2020-12-16 07:37:30 +00:00
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/get-tests?type=unit&n=2').then(
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(data) => {
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assert.equal(data.assertions[2].method, 'isOk', 'true is truthy');
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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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2018-10-10 22:03:03 +00:00
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```
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2020-08-13 15:24:35 +00:00
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2020-12-16 07:37:30 +00:00
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# --solutions--
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2021-01-13 02:31:00 +00:00
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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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