---
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
```