nethunder-simluate

@testing-library/user-event

Fire events the same way the user does

---

The problem

From testing-library/dom-testing-library#107:

[...] it is becoming apparent the need to express user actions on a web page using a higher-level abstraction than fireEvent

The solution

user-event tries to simulate the real events that would happen in the browser as the user interacts with it. For example userEvent.click(checkbox) would change the state of the checkbox.

The library is still a work in progress and any help is appreciated.

Table of Contents

• Installation
• API
  • click(element, eventInit, options)
  • dblClick(element, eventInit, options)
  • type(element, text, [options])
  • keyboard(text, options)
  • upload(element, file, [{ clickInit, changeInit }], [options])
  • clear(element)
  • selectOptions(element, values)
  • deselectOptions(element, values)
  • tab({shift, focusTrap})
  • hover(element)
  • unhover(element)
  • paste(element, text, eventInit, options)
  • specialChars
• Issues
  • 🐛 Bugs
  • 💡 Feature Requests
• Contributors ✨
• LICENSE

Installation

With NPM:

npm install @testing-library/user-event @testing-library/dom --save-dev

With Yarn:

yarn add @testing-library/user-event @testing-library/dom --dev

Now simply import it in your tests:

import userEvent from '@testing-library/user-event'

// or

const {default: userEvent} = require('@testing-library/user-event')

API

Note: All userEvent methods are synchronous with one exception: when delay with userEvent.type as described below). We also discourage using userEvent inside before/after blocks at all, for important reasons described in "Avoid Nesting When You're Testing".

click(element, eventInit, options)

Clicks element, depending on what element is it can have different side effects.

import React from 'react'
import {render, screen} from '@testing-library/react'
import userEvent from '@testing-library/user-event'

test('click', () => {
  render(
    <div>
      <label htmlFor="checkbox">Check</label>
      <input id="checkbox" type="checkbox" />
    </div>,
  )

  userEvent.click(screen.getByText('Check'))
  expect(screen.getByLabelText('Check')).toBeChecked()
})

You can also ctrlClick / shiftClick etc with

userEvent.click(elem, {ctrlKey: true, shiftKey: true})

See the MouseEvent constructor documentation for more options.

Note that click will trigger hover events before clicking. To disable this, set the skipHover option to true. Also note that trying to click an element with pointer-events being set to "none" (i.e. unclickable) will throw an error.

dblClick(element, eventInit, options)

Clicks element twice, depending on what element is it can have different side effects.

import React from 'react'
import {render, screen} from '@testing-library/react'
import userEvent from '@testing-library/user-event'

test('double click', () => {
  const onChange = jest.fn()
  render(<input type="checkbox" onChange={onChange} />)
  const checkbox = screen.getByRole('checkbox')
  userEvent.dblClick(checkbox)
  expect(onChange).toHaveBeenCalledTimes(2)
  expect(checkbox).not.toBeChecked()
})

type(element, text, [options])

Writes text inside an <input> or a <textarea>.

import React from 'react'
import {render, screen} from '@testing-library/react'
import userEvent from '@testing-library/user-event'

test('type', () => {
  render(<textarea />)

  userEvent.type(screen.getByRole('textbox'), 'Hello,{enter}World!')
  expect(screen.getByRole('textbox')).toHaveValue('Hello,\nWorld!')
})

options.delay is the number of milliseconds that pass between two characters are typed. By default it's 0. You can use this option if your component has a different behavior for fast or slow users. If you do this, you need to make sure to await!

type will click the element before typing. To disable this, set the skipClick option to true.

Special characters

The following special character strings are supported:

Text string	Key	Modifier	Notes
{enter}	Enter	N/A	Will insert a newline character (<textarea /> only).
{space}	' '	N/A
{esc}	Escape	N/A
{backspace}	Backspace	N/A	Will delete the previous character (or the characters within the selectedRange, see example below).
{del}	Delete	N/A	Will delete the next character (or the characters within the selectedRange, see example below)
{selectall}	N/A	N/A	Selects all the text of the element. Note that this will only work for elements that support selection ranges (so, not email, password, number, among others)
{arrowleft}	ArrowLeft	N/A
{arrowright}	ArrowRight	N/A
{arrowup}	ArrowUp	N/A
{arrowdown}	ArrowDown	N/A
{home}	Home	N/A
{end}	End	N/A
{shift}	Shift	shiftKey	Does not capitalize following characters.
{ctrl}	Control	ctrlKey
{alt}	Alt	altKey
{meta}	OS	metaKey
{capslock}	CapsLock	modifierCapsLock	Fires both keydown and keyup when used (simulates a user clicking their "Caps Lock" button to enable caps lock).

A note about modifiers: Modifier keys ({shift}, {ctrl}, {alt}, {meta}) will activate their corresponding event modifiers for the duration of type command or until they are closed (via {/shift}, {/ctrl}, etc.). If they are not closed explicitly, then events will be fired to close them automatically (to disable this, set the skipAutoClose option to true).

We take the same stance as Cypress in that we do not simulate the behavior that happens with modifier key combinations as different operating systems function differently in this regard.

An example of an usage with a selection range:

import React from 'react'
import {render, screen} from '@testing-library/react'
import userEvent from '@testing-library/user-event'

test('delete characters within the selectedRange', () => {
  render(
    <div>
      <label htmlFor="my-input">Example:</label>
      <input id="my-input" type="text" value="This is a bad example" />
    </div>,
  )
  const input = screen.getByLabelText(/example/i)
  input.setSelectionRange(10, 13)
  userEvent.type(input, '{backspace}good')

  expect(input).toHaveValue('This is a good example')
})

support

The following is an example of usage of this library with <input type="time" />

import React from 'react'
import {render, screen} from '@testing-library/react'
import userEvent from '@testing-library/user-event'

test('types into the input', () => {
  render(
    <>
      <label for="time">Enter a time</label>
      <input type="time" id="time" />
    </>,
  )
  const input = screen.getByLabelText(/enter a time/i)
  userEvent.type(input, '13:58')
  expect(input.value).toBe('13:58')
})

keyboard(text, options)

Simulates the keyboard events described by text. This is similar to userEvent.type() but without any clicking or changing the selection range.

You should use userEvent.keyboard if you want to just simulate pressing buttons on the keyboard. You should use userEvent.type if you just want to conveniently insert some text into an input field or textarea.

Keystrokes can be described:

• Per printable character

  userEvent.keyboard('foo') // translates to: f, o, o

  The brackets { and [ are used as special character and can be referenced by doubling them.

  userEvent.keyboard('{{a[[') // translates to: {, a, [

• Per KeyboardEvent.key (only supports alphanumeric values of key)

  userEvent.keyboard('{Shift}{f}{o}{o}') // translates to: Shift, f, o, o

  This does not keep any key pressed. So Shift will be lifted before pressing f.
• Per KeyboardEvent.code

  userEvent.keyboard('[ShiftLeft][KeyF][KeyO][KeyO]') // translates to: Shift, f, o, o

• Per legacy userEvent.type modifier/specialChar The modifiers like {shift} (note the lowercase) will automatically be kept pressed, just like before. You can cancel this behavior by adding a / to the end of the descriptor.

  userEvent.keyboard('{shift}{ctrl/}a{/shift}') // translates to: Shift(down), Control(down+up), a, Shift(up)

Keys can be kept pressed by adding a > to the end of the descriptor - and lifted by adding a / to the beginning of the descriptor:

userEvent.keyboard('{Shift>}A{/Shift}') // translates to: Shift(down), A, Shift(up)

userEvent.keyboard returns a keyboard state that can be used to continue keyboard operations.

const keyboardState = userEvent.keyboard('[ControlLeft>]') // keydown [ControlLeft]
// ... inspect some changes ...
userEvent.keyboard('a', {keyboardState}) // press [KeyA] with active ctrlKey modifier

The mapping of key to code is performed by a default key map portraying a "default" US-keyboard. You can provide your own local keyboard mapping per option.

userEvent.keyboard('?', {keyboardMap: myOwnLocaleKeyboardMap})

Future versions might try to interpolate the modifiers needed to reach a printable key on the keyboard. E.g. Automatically pressing {Shift} when CapsLock is not active and A is referenced. If you don't wish this behavior, you can pass autoModify: false when using userEvent.keyboard in your code.

upload(element, file, [{ clickInit, changeInit }], [options])

Uploads file to an <input>. For uploading multiple files use <input> with multiple attribute and the second upload argument must be array then. Also it's possible to initialize click or change event with using third argument.

If options.applyAccept is set to true and there is an accept attribute on the element, files that don't match will be discarded.

import React from 'react'
import {render, screen} from '@testing-library/react'
import userEvent from '@testing-library/user-event'

test('upload file', () => {
  const file = new File(['hello'], 'hello.png', {type: 'image/png'})

  render(
    <div>
      <label htmlFor="file-uploader">Upload file:</label>
      <input id="file-uploader" type="file" />
    </div>,
  )
  const input = screen.getByLabelText(/upload file/i)
  userEvent.upload(input, file)

  expect(input.files[0]).toStrictEqual(file)
  expect(input.files.item(0)).toStrictEqual(file)
  expect(input.files).toHaveLength(1)
})

test('upload multiple files', () => {
  const files = [
    new File(['hello'], 'hello.png', {type: 'image/png'}),
    new File(['there'], 'there.png', {type: 'image/png'}),
  ]

  render(
    <div>
      <label htmlFor="file-uploader">Upload file:</label>
      <input id="file-uploader" type="file" multiple />
    </div>,
  )
  const input = screen.getByLabelText(/upload file/i)
  userEvent.upload(input, files)

  expect(input.files).toHaveLength(2)
  expect(input.files[0]).toStrictEqual(files[0])
  expect(input.files[1]).toStrictEqual(files[1])
})

clear(element)

Selects the text inside an <input> or <textarea> and deletes it.

import React from 'react'
import {render, screen} from '@testing-library/react'
import userEvent from '@testing-library/user-event'

test('clear', () => {
  render(<textarea value="Hello, World!" />)

  userEvent.clear(screen.getByRole('textbox', 'email'))
  expect(screen.getByRole('textbox', 'email')).toHaveAttribute('value', '')
})

selectOptions(element, values)

Selects the specified option(s) of a <select> or a <select multiple> element.

import React from 'react'
import {render, screen} from '@testing-library/react'
import userEvent from '@testing-library/user-event'

test('selectOptions', () => {
  render(
    <select multiple data-testid="select-multiple">
      <option data-testid="val1" value="1">
        A
      </option>
      <option data-testid="val2" value="2">
        B
      </option>
      <option data-testid="val3" value="3">
        C
      </option>
    </select>,
  )

  userEvent.selectOptions(screen.getByTestId('select-multiple'), ['1', '3'])

  expect(screen.getByTestId('val1').selected).toBe(true)
  expect(screen.getByTestId('val2').selected).toBe(false)
  expect(screen.getByTestId('val3').selected).toBe(true)
})

The values parameter can be either an array of values or a singular scalar value.

It also accepts option nodes:

userEvent.selectOptions(screen.getByTestId('select-multiple'), [
  screen.getByText('A'),
  screen.getByText('B'),
])

deselectOptions(element, values)

Remove the selection for the specified option(s) of a <select multiple> element.

import * as React from 'react'
import {render, screen} from '@testing-library/react'
import userEvent from '@testing-library/user-event'

test('deselectOptions', () => {
  render(
    <select multiple>
      <option value="1">A</option>
      <option value="2">B</option>
      <option value="3">C</option>
    </select>,
  )

  userEvent.selectOptions(screen.getByRole('listbox'), '2')
  expect(screen.getByText('B').selected).toBe(true)
  userEvent.deselectOptions(screen.getByRole('listbox'), '2')
  expect(screen.getByText('B').selected).toBe(false)
  // can do multiple at once as well:
  // userEvent.deselectOptions(screen.getByRole('listbox'), ['1', '2'])
})

The values parameter can be either an array of values or a singular scalar value.

tab({shift, focusTrap})

Fires a tab event changing the document.activeElement in the same way the browser does.

Options:

• shift (default false) can be true or false to invert tab direction.
• focusTrap (default document) a container element to restrict the tabbing within.

A note about tab: jsdom does not support tabbing, so this feature is a way to enable tests to verify tabbing from the end user's perspective. However, this limitation in jsdom will mean that components like focus-trap-react will not work with userEvent.tab() or jsdom. For that reason, the focusTrap option is available to let you ensure your user is restricted within a focus-trap.

import React from 'react'
import {render, screen} from '@testing-library/react'
import '@testing-library/jest-dom/extend-expect'
import userEvent from '@testing-library/user-event'

it('should cycle elements in document tab order', () => {
  render(
    <div>
      <input data-testid="element" type="checkbox" />
      <input data-testid="element" type="radio" />
      <input data-testid="element" type="number" />
    </div>,
  )

  const [checkbox, radio, number] = screen.getAllByTestId('element')

  expect(document.body).toHaveFocus()

  userEvent.tab()

  expect(checkbox).toHaveFocus()

  userEvent.tab()

  expect(radio).toHaveFocus()

  userEvent.tab()

  expect(number).toHaveFocus()

  userEvent.tab()

  // cycle goes back to the body element
  expect(document.body).toHaveFocus()

  userEvent.tab()

  expect(checkbox).toHaveFocus()
})

hover(element)

Hovers over element.

import React from 'react'
import {render, screen} from '@testing-library/react'
import userEvent from '@testing-library/user-event'
import Tooltip from '../tooltip'

test('hover', () => {
  const messageText = 'Hello'
  render(
    <Tooltip messageText={messageText}>
      <TrashIcon aria-label="Delete" />
    </Tooltip>,
  )

  userEvent.hover(screen.getByLabelText(/delete/i))
  expect(screen.getByText(messageText)).toBeInTheDocument()
  userEvent.unhover(screen.getByLabelText(/delete/i))
  expect(screen.queryByText(messageText)).not.toBeInTheDocument()
})

unhover(element)

Unhovers out of element.

See above for an example

paste(element, text, eventInit, options)

Allows you to simulate the user pasting some text into an input.

test('should paste text in input', () => {
  render(<MyInput />)

  const text = 'Hello, world!'
  userEvent.paste(getByRole('textbox', {name: /paste your greeting/i}), text)
  expect(element).toHaveValue(text)
})

You can use the eventInit if what you're pasting should have clipboardData (like files).

specialChars

A handful set of special characters used in type method.

Key	Character
arrowLeft	{arrowleft}
arrowRight	{arrowright}
arrowDown	{arrowdown}
arrowUp	{arrowup}
home	{home}
end	{end}
enter	{enter}
escape	{esc}
delete	{del}
backspace	{backspace}
selectAll	{selectall}
space	{space}
whitespace	' '

Usage example:

import React from 'react'
import {render, screen} from '@testing-library/react'
import userEvent, {specialChars} from '@testing-library/user-event'

test('delete characters within the selectedRange', () => {
  render(
    <div>
      <label htmlFor="my-input">Example:</label>
      <input id="my-input" type="text" value="This is a bad example" />
    </div>,
  )
  const input = screen.getByLabelText(/example/i)
  input.setSelectionRange(10, 13)
  userEvent.type(input, `${specialChars.backspace}good`)

  expect(input).toHaveValue('This is a good example')
})

Issues

Looking to contribute? Look for the Good First Issue label.

🐛 Bugs

Please file an issue for bugs, missing documentation, or unexpected behavior.

See Bugs

💡 Feature Requests

Please file an issue to suggest new features. Vote on feature requests by adding a 👍. This helps maintainers prioritize what to work on.

See Feature Requests

Contributors ✨

Thanks goes to these people (emoji key):

Giorgio Polvara 🐛 💻 📖 🤔 🚇 👀 ⚠️	Weyert de Boer 💻 ⚠️	Tim Whitbeck 🐛 💻	Michaël De Boey 📖	Michael Lasky 💻 📖 🤔	Ahmad Esmaeilzadeh 📖	Caleb Eby 💻 🐛 👀
Adrià Fontcuberta 🐛 ⚠️ 💻	Sky Wickenden 🐛 💻	Bodnar Bogdan 🐛 💻	Zach Perrault 📖	Ryan Stelly 📖	Ben Monro 💻	Christopher Martin 💻
Yuancheng Wu 👀	MJ 📖	Jeff McRiffey 💻 ⚠️	Jaga Santagostino 💻 ⚠️	jordyvandomselaar 💻 ⚠️	Ilya Lyamkin 💻 ⚠️	Kenneth Luján Rosas 💻 ⚠️
Joe Morgan 💻	David Hirtle 💻	whiteUnicorn 💻	Matej Šnuderl 👀	Rodrigo Pombo 💻	Jake Verbaten 💻	Spencer Miskoviak 📖
Vadim Shvetsov 🤔 💻 ⚠️	Greg Shtilman 💻 ⚠️ 🐛	Ricardo Busquet 🐛 💻 ⚠️	Doug Bacelar 💻 ⚠️	Kayleigh Ridd 🐛 💻 ⚠️	Malcolm Kee 💻 📖 ⚠️	kelvinlzhang 🐛
Krzysztof 🐛	Pontus Lundin 💻 ⚠️	Aleks Hudochenkov 🐛	Vijay Kumar Otti 🐛	Tom Picton 🐛 💻 ⚠️	Hung Viet Nguyen 🐛	Nick McCurdy 📆 💬 💻 ⚠️ 📖
Tim Deschryver ⚠️	Ben Dyer 💻 ⚠️	Dan Kirkham 💻	Johannesklint 📖	Juan Carlos Medina 💻 ⚠️	Dade Cook 💻 ⚠️	Leandro Lourenci 💻 ⚠️
Marco Moretti 💻 ⚠️	ybentz 💻 ⚠️	Nasdan 🐛	Javier Martínez 📖	Jörg Bayreuther 💻 ⚠️ 📖	Lucas Bernalte 📖	Maxwell Newlands 💻 ⚠️
ph-fritsche 💻 ⚠️	Rey Wright 🐛 💻	Niklas Mischkulnig 💻 ⚠️	Pascal Duez 💻	Malachi Willey 💻 ⚠️	Clark Winters 📖	lazytype 💻 ⚠️
Luís Takahashi 💻 ⚠️	Jesu Castillo 💻 ⚠️	Sarah Dayan 📖	Mirone 🐛	Amanda Pouget 📖	Sonic12040 💻 ⚠️ 📖	Gonzalo D'Elia 💻 ⚠️ 📖
Vasilii Kovalev 💻 📖	Dale Seo 📖	Alex Boyce 💻	Ben Styles 💻 ⚠️	Laura Beatris 💻 ⚠️	Boris Serdiuk 🐛	bozdoz 📖 🐛 ⚠️
Jan Kattelans 💻	schoeneu 🐛	Martin Kapal 🐛	Stavros 🐛	geoffroymounier 🐛	Fergus McDonald 💻	Robin Ambachtsheer 🐛
Mohit 🐛 💻 ⚠️	Daniel Contreras 🐛	Eugene Ghanizadeh 💻	Victor Repkow 💻	Jonathan Felchlin 💻	sydneyjodon-wk 🐛 💻	Charles Magic Woo 🐛

This project follows the all-contributors specification. Contributions of any kind welcome!

LICENSE

MIT