--- id: 587d824d367417b2b2512c50 title: 测试某个值是否为数组 challengeType: 2 forumTopicId: 301600 dashedName: test-if-a-value-is-an-array --- # --description-- 请注意,本项目在[这个 Replit 项目](https://replit.com/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-- 在 `tests/1_unit-tests.js` 中,`Arrays` 套件里标有 `#11` 的测试下,将每个 `assert` 改成 `assert.isArray` 或 `assert.isNotArray` 方法,通过测试(结果应该返回 `true`)。 不要改变传入断言的参数。 # --hints-- 不应有未通过的测试 ```js (getUserInput) => $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=10').then( (data) => { assert.equal(data.state, 'passed'); }, (xhr) => { throw new Error(xhr.responseText); } ); ``` 请选择正确的断言——`isArray` 或 `isNotArray`。 ```js (getUserInput) => $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=10').then( (data) => { assert.equal( data.assertions[0].method, 'isArray', 'String.prototype.split() returns an Array' ); }, (xhr) => { throw new Error(xhr.responseText); } ); ``` 请选择正确的断言——`isArray` 或 `isNotArray`。 ```js (getUserInput) => $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=10').then( (data) => { assert.equal( data.assertions[1].method, 'isNotArray', 'Array.prototype.indexOf() returns a number' ); }, (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. */ ```