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Posted : admin | On 02-05-2021

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Difference from DOM Testing Library. The queries returned from render in React Testing Library are the same as DOM Testing Library except they have the first argument bound to the document, so instead of getByText(node, 'text') you do getByText('text').

A short guide to all the exported functions in React Testing Library

renderconst {/* */} = render(Component) returns:
- unmount function to unmount the component
- container reference to the DOM node where the component is mounted
- all the queries from DOM Testing Library, bound to the document so thereis no need to pass a node as the first argument (usually, you can use thescreen import instead)

import{ render, fireEvent, screen }from'@testing-library/react'

test('loads items eventually',async()=>{

fireEvent.click(getByText('Load'))

// Wait for page to update with query text

const items =await screen.findAllByText(/Item #[0-9]: /)

})

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Queries#

Difference from DOM Testing Library

The queries returned from render in React Testing Library are the same asDOM Testing Library except they have the first argument bound to thedocument, so instead of getByText(node, 'text') you do getByText('text')

See Which query should I use?

No Match	1 Match	1+ Match	Await?
getBy	throw	return	throw	No
findBy	throw	return	throw	Yes
queryBy	null	return	throw	No
getAllBy	throw	array	array	No
findAllBy	throw	array	array	Yes
queryAllBy	[]	array	array	No

ByLabelText find by label or aria-label text content
- getByLabelText
- queryByLabelText
- getAllByLabelText
- queryAllByLabelText
- findByLabelText
- findAllByLabelText
ByPlaceholderText find by input placeholder value
- getByPlaceholderText
- queryByPlaceholderText
- getAllByPlaceholderText
- queryAllByPlaceholderText
- findByPlaceholderText
- findAllByPlaceholderText
ByText find by element text content
- getByText
- queryByText
- getAllByText
- queryAllByText
- findByText
- findAllByText
ByDisplayValue find by form element current value
- getByDisplayValue
- queryByDisplayValue
- getAllByDisplayValue
- queryAllByDisplayValue
- findByDisplayValue
- findAllByDisplayValue
ByAltText find by img alt attribute
- getByAltText
- queryByAltText
- getAllByAltText
- queryAllByAltText
- findByAltText
- findAllByAltText
ByTitle find by title attribute or svg title tag
- getByTitle
- queryByTitle
- getAllByTitle
- queryAllByTitle
- findByTitle
- findAllByTitle
ByRole find by aria role
- getByRole
- queryByRole
- getAllByRole
- queryAllByRole
- findByRole
- findAllByRole
ByTestId find by)
configure change global options:configure({testIdAttribute: 'my-data-test-id'})
cleanup clears the DOM (use with afterEach to resetDOM between tests)

Text Match Options#

Given the following HTML:

Will find the div:

getByText('Hello World')// full string match

getByText('llo Worl',{ exact:false})// substring match

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getByText('hello world',{ exact:false})// ignore case

// Matching a regex:

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getByText(/world/i)// substring match, ignore case

getByText(/^hello world$/i)// full string match, ignore case

getByText((content, element)=> content.startsWith('Hello'))