---
id: 587d824e367417b2b2512c57
title: Test if an Object is an Instance of a Constructor
challengeType: 2
videoUrl: ''
localeTitle: 测试对象是否是构造函数的实例
---
## Description
提醒一下，这个项目是基于Glitch的以下入门项目构建的，或者是从GitHub克隆的。 #instanceOf声明对象是构造函数的实例。在适当的地方使用#instanceOf或#notInstanceOf
## Instructions
## Tests
```yml
tests:
- text: 所有测试都应该通过
testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=17').then(data => { assert.equal(data.state,'passed'); }, xhr => { throw new Error(xhr.responseText); })
- text: 选择正确的断言 - instanceOf与notInstanceOf
testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=17').then(data => { assert.equal(data.assertions[0].method, 'notInstanceOf', 'myCar is not an instance of Plane'); }, xhr => { throw new Error(xhr.responseText); })
- text: 选择正确的断言 - instanceOf与notInstanceOf
testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=17').then(data => { assert.equal(data.assertions[1].method, 'instanceOf', 'airlinePlane is an instance of Plane'); }, xhr => { throw new Error(xhr.responseText); })
- text: 选择正确的断言 - instanceOf与notInstanceOf
testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=17').then(data => { assert.equal(data.assertions[2].method, 'instanceOf', 'everything is an Object in JavaScript...'); }, xhr => { throw new Error(xhr.responseText); })
- text: 选择正确的断言 - instanceOf与notInstanceOf
testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=17').then(data => { assert.equal(data.assertions[3].method, 'notInstanceOf', 'myCar.wheels is not an instance of String'); }, xhr => { throw new Error(xhr.responseText); })
```
## Challenge Seed
## Solution
```js
// solution required
```