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@atom-learning/jest-stitches
Advanced tools
Jest utilities for Stitches
npm i -D jest-stitches
The easiest way to test React, Preact, and Preact X components with Stitches is using the snapshot serializer. You can register the serializer via the snapshotSerializers
configuration property in your jest configuration like so:
// jest.config.js
module.exports = {
// ... other config
snapshotSerializers: ['jest-stitches'],
}
Or you can customize the serializer via the createSerializer
method like so: (the example below is with react-test-renderer but jest-stitches
also works with enzyme and react-testing-library)
import React from 'react'
import renderer from 'react-test-renderer'
import {createStyled} from '@stitches/react'
import serializer from 'jest-stitches'
const {styled, css} = createStyled({})
expect.addSnapshotSerializer(serializer)
test('renders with correct styles', () => {
const Button = styled('button', {
variants: {
blue: {
backgroundColor: 'blue',
},
},
})
const tree = renderer.create(<Button>Hello world</Button>).toJSON()
expect(tree).toMatchSnapshot()
})
DOMElements
jest-stitches
's snapshot serializer inserts styles and replaces class names in both React and DOM elements. If you would like to disable this behavior for DOM elements, you can do so by passing { DOMElements: false }
. For example:
import {createSerializer} from 'jest-stitches'
// configures jest-stitches to ignore DOM elements
expect.addSnapshotSerializer(createSerializer({DOMElements: false}))
To make more explicit assertions when testing your components you can use the toHaveStyleRule
matcher.
import React from 'react'
import renderer from 'react-test-renderer'
import {createStyled} from '@stitches/react'
import {matchers} from 'jest-stitches'
const {styled, css} = createStyled({})
// Add the custom matchers provided by 'jest-stitches'
expect.extend(matchers)
test('renders with correct styles', () => {
const Button = styled('button', {
variants: {
blue: {
backgroundColor: 'blue',
},
},
})
const tree = renderer.create(<Button>Hello world</Button>).toJSON()
expect(tree).toHaveStyleRule('background-color', 'blue')
expect(tree).not.toHaveStyleRule('background-color', 'hotpink')
})
This was inspired by and relies almost entirely on work by jest-emotion which was largely inspired by jest-glamor-react.
MIT
FAQs
Jest utilities for @stitches/react
The npm package @atom-learning/jest-stitches receives a total of 19 weekly downloads. As such, @atom-learning/jest-stitches popularity was classified as not popular.
We found that @atom-learning/jest-stitches demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 3 open source maintainers collaborating on the project.
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