Jest

Jest is a JavaScript testing framework.

37 topics7 tags

Study this deck

Learning tools

Choose how to study

See all 5 tools

Flash Cards

Flip between question and answer, in both languages, at your own pace.

~5 minStart

Recommended

Rapid Repetition

Short sessions that resurface exactly what you forget, until it sticks.

~3 min per sessionStart

Practice Test

Exam-style questions with a score at the end. Find your weak spots.

~10 minStart

Quiz Game

Beat the clock: answer before time runs out and raise your high score.

~4 minStart

The content

Explore the topics

Jest

Globals

Expect

Mock Functions

The Jest Object

Configuring Jest

Jest CLI Options

afterAll

afterEach

beforeEach

describe

describe.each

describe.only

describe.only.each

describe.skip

describe.skip.each

test

test.each

test.only

test.only.each

beforeAll

test.skip.each

test.todo

expect.extend (matchers)

Async Matchers

Custom Matchers API

this.isNot

this.promise

this.equals (a, b)

this.expand

this.utils

Custom snapshot matchers

expect.string Containing (string)

.not

.toBeFalsy ()

.toBeNull ()

.toBeUndefined ()

.toBeNaN()

Read it all?

Rapid repetition replays exactly what you forget — the fastest way to lock it in before the exam.

Try rapid repetition