---
id: 587d824d367417b2b2512c50
title: Test if a Value is an Array
challengeType: 2
forumTopicId: 301600
---
## Description
As a reminder, this project is being built upon the following starter project on Glitch, or cloned from GitHub.
## Instructions
Use assert.isArray()
or assert.isNotArray()
to make the tests pass.
## Tests
```yml
tests:
- text: All tests should pass
testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=10').then(data => {assert.equal(data.state,'passed'); }, xhr => { throw new Error(xhr.responseText); })
- text: Choose the right assertion - isArray vs. isNotArray
testString: 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); })
- text: Choose the right assertion - isArray vs. isNotArray
testString: 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); })
```
## Challenge Seed
## Solution
```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.
*/
```