createSnapshot

Renders Fela components into a string snapshot including both rendered HTML and CSS to achieve predictable component tests.

It formats and optimises the output for maximum readability.

Arguments

Argument	Type	Default	Description
component	Component(new tab)		A valid React component that is rendered.
theme	Object?	`{}`	A theme object that is automatically used for rendering.
renderer	Renderer?	`createRenderer()`	A Fela renderer with custom configuration
Provider	Provider?	bindings specific Provider	A custom Provider component
ThemeProvider	ThemeProvider?	bindings specific ThemeProvider	A custom ThemeProvider component

Returns

(string): Formatted string including CSS and HTML.

Imports

import { createSnapshot } from 'jest-react-fela'
import { createSnapshot } from 'jest-preact-fela'
import { createSnapshot } from 'jest-inferno-fela'

Example

describe('Rendering a Fela component', () => {
  it('should render correctly', () => {
    const snapshot = createSnapshot(
      <FelaComponent style={{ color: 'blue', backgroundColor: 'black' }} />
    )

    expect(snapshot).toMatchSnapshot()
  })
})

Snapshot

.a {
  color: blue
}

.b {
  background-color: black
}

<div className=a b />

Passing a Theme

describe('Rendering a Fela component', () => {
  it('should render correctly', () => {
    const rule = ({ theme }) => ({
      backgroundColor: theme.primary,
      color: theme.secondary,
    })

    const theme = {
      primary: 'blue',
      secondary: 'red',
    }

    const snapshot = createSnapshot(<FelaComponent rule={rule} />, theme)

    expect(snapshot).toMatchSnapshot()
  })
})

Snapshot

.a {
  background-color: blue
}

.b {
  color: red
}

<div className=a b />