Problems/Coding/Jest/Easy

Easy Jest

Coding problems · 100 total

Write basic test case

Implement test suite

Create describe block

Implement it test

Create expect assertion

Implement toBe matcher

Create toEqual matcher

Implement toBeTruthy

Create toBeFalsy

Implement toBeNull

Create toBeUndefined

Implement toBeDefined

Create toContain matcher

Implement toHaveLength

Create toMatch regex

Implement toThrow

Create beforeEach hook

Implement afterEach hook

Create beforeAll hook

Implement afterAll hook

Create test.only

Implement test.skip

Create test.todo

Implement test.each

Create mock function

Implement jest.fn

Create mock return value

Implement mock implementation

Create spy on method

Implement jest.spyOn

Create mock module

Implement jest.mock

Create manual mock

Implement mocks folder

Create mock timers

Implement jest.useFakeTimers

Create advanceTimersByTime

Implement runAllTimers

Create clearAllTimers

Implement snapshot testing

Create toMatchSnapshot

Implement inline snapshot

Create update snapshots

Implement async testing

Create async/await test

Implement Promise test

Create callback test

Implement done callback

Create resolves matcher

Implement rejects matcher

Create test coverage

Implement coverage report

Create threshold config

Implement collectCoverageFrom

Create coverage directory

Implement jest.config.js

Create test environment

Implement jsdom environment

Create node environment

Implement setupFiles

Create setupFilesAfterEnv

Implement global setup

Create global teardown

Implement test match patterns

Create test path ignore

Implement module paths

Create module name mapper

Implement transform

Create babel-jest

Implement ts-jest

Create preset configuration

Implement react preset

Create vue preset

Implement angular preset

Create custom matcher

Implement expect.extend

Create assertion helper

Implement test utilities

Create factory functions

Implement fixture data

Create test builders

Implement object mothers

Create test data generators

Implement faker usage

Create mock data

Implement stub functions

Create test doubles

Implement mock reset

Create mock clear

Implement mock restore

Create assertion count

Implement hasAssertions

Create toBeGreaterThan matcher

Implement toBeLessThan matcher

Create toBeCloseTo matcher

Implement toHaveProperty matcher

Create toMatchObject matcher

Implement toStrictEqual matcher

Create toBeInstanceOf matcher

Implement arrayContaining matcher