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index.test.tsx
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index.test.tsx
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import { StyleSheet, Platform, NativeModules } from 'react-native'
import React from 'react'
import renderer from 'react-test-renderer'
import FastImage from './index'
const style = StyleSheet.create({ image: { width: 44, height: 44 } })
describe('FastImage (iOS)', () => {
beforeAll(() => {
Platform.OS = 'ios'
NativeModules.FastImageView = {
preload: Function.prototype,
clearMemoryCache: Function.prototype,
clearDiskCache: Function.prototype,
}
})
it('renders', () => {
const tree = renderer
.create(
<FastImage
source={{
uri: 'https://facebook.github.io/react/img/logo_og.png',
headers: {
token: 'someToken',
},
priority: FastImage.priority.high,
}}
style={style.image}
/>,
)
.toJSON()
expect(tree).toMatchSnapshot()
})
it('renders a normal Image when not passed a uri', () => {
const tree = renderer
.create(
<FastImage
source={require('../ReactNativeFastImageExampleServer/pictures/jellyfish.gif')}
style={style.image}
/>,
)
.toJSON()
expect(tree).toMatchSnapshot()
})
it('renders Image with fallback prop', () => {
const tree = renderer
.create(
<FastImage
source={require('../ReactNativeFastImageExampleServer/pictures/jellyfish.gif')}
style={style.image}
fallback
/>,
)
.toJSON()
expect(tree).toMatchSnapshot()
})
it('renders defaultSource', () => {
const tree = renderer
.create(
<FastImage
defaultSource={require('../ReactNativeFastImageExampleServer/pictures/jellyfish.gif')}
style={style.image}
/>,
)
.toJSON()
expect(tree).toMatchSnapshot()
})
it('runs static functions', () => {
FastImage.preload([
{
uri: 'https://facebook.github.io/react/img/logo_og.png',
headers: {
token: 'someToken',
},
priority: FastImage.priority.high,
},
])
FastImage.clearMemoryCache()
FastImage.clearDiskCache()
})
})
describe('FastImage (Android)', () => {
beforeAll(() => {
Platform.OS = 'android'
})
it('renders a normal defaultSource', () => {
const tree = renderer
.create(
<FastImage
defaultSource={require('../ReactNativeFastImageExampleServer/pictures/jellyfish.gif')}
style={style.image}
/>,
)
.toJSON()
expect(tree).toMatchSnapshot()
})
it('renders a normal defaultSource when fails to load source', () => {
const tree = renderer
.create(
<FastImage
defaultSource={require('../ReactNativeFastImageExampleServer/pictures/jellyfish.gif')}
source={{
uri: 'https://www.google.com/image_does_not_exist.png',
}}
style={style.image}
/>,
)
.toJSON()
expect(tree).toMatchSnapshot()
})
it('renders a non-existing defaultSource', () => {
const tree = renderer
.create(<FastImage defaultSource={12345} style={style.image} />)
.toJSON()
expect(tree).toMatchSnapshot()
})
})