freeCodeCamp/test-if-an-object-is-an-instance-of-a-constructor.english.md at bd68b70f3de9699eaa094d14d4706bea3c83d43f

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Oliver Eyton-Williams bd68b70f3d Feat: hide blocks not challenges (#39504 )

* fix: remove isHidden flag from frontmatter

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Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

* feat: hide blocks not challenges

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

2020-09-03 15:07:40 -07:00

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id, title, challengeType, forumTopicId

id	title	challengeType	forumTopicId
587d824e367417b2b2512c57	Test if an Object is an Instance of a Constructor	2	301605

Description

As a reminder, this project is being built upon the following starter project on Repl.it, or cloned from GitHub. #instanceOf asserts that an object is an instance of a constructor.

Instructions

Use assert.instanceOf() or assert.notInstanceOf() to make the tests pass.

Tests

tests:
  - text: All tests should pass.
    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: You should choose the right assertion - instanceOf vs. 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: You should choose the right assertion - instanceOf vs. 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: You should choose the right assertion - instanceOf vs. 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: You should choose the right assertion - instanceOf vs. 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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