freeCodeCamp/curriculum/challenges/chinese/06-quality-assurance/quality-assurance-and-testing-with-chai/test-if-an-object-is-an-instance-of-a-constructor.md

id, challengeType, forumTopicId, title

id	challengeType	forumTopicId	title
587d824e367417b2b2512c57	2	301605	测试对象是否是构造函数的实例

Description

请注意，本项目在 这个 Repl.it 项目 的基础上进行开发。你也可以从 GitHub 上克隆。 #instanceOf 断言一个对象是一个构造器的实例。

Instructions

使用 assert.instanceOf() 或 assert.notInstanceOf() 让测试通过。

Tests

tests:
  - text: 不应有未通过的测试
    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: 请选择正确的断言—instanceOf 或 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: 请选择正确的断言—instanceOf 或 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: 请选择正确的断言—instanceOf 或 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: 请选择正确的断言—instanceOf 或 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

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