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import {deleteAsync} from 'expo-file-system'
import {manipulateAsync, SaveFormat} from 'expo-image-manipulator'
import RNFetchBlob from 'rn-fetch-blob'
import {
downloadAndResize,
DownloadAndResizeOpts,
getResizedDimensions,
} from '../../src/lib/media/manip'
const mockResizedImage = {
path: 'file://resized-image.jpg',
size: 100,
width: 100,
height: 100,
mime: 'image/jpeg',
}
describe('downloadAndResize', () => {
const errorSpy = jest.spyOn(global.console, 'error')
beforeEach(() => {
const mockedCreateResizedImage = manipulateAsync as jest.Mock
mockedCreateResizedImage.mockResolvedValue({
uri: 'file://resized-image.jpg',
...mockResizedImage,
})
})
afterEach(() => {
jest.clearAllMocks()
})
it('should return resized image for valid URI and options', async () => {
const mockedFetch = RNFetchBlob.fetch as jest.Mock
mockedFetch.mockResolvedValueOnce({
path: jest.fn().mockReturnValue('file://downloaded-image.jpg'),
info: jest.fn().mockReturnValue({status: 200}),
flush: jest.fn(),
})
const opts: DownloadAndResizeOpts = {
uri: 'https://example.com/image.jpg',
width: 100,
height: 100,
maxSize: 500000,
mode: 'cover',
timeout: 10000,
}
const result = await downloadAndResize(opts)
expect(result).toEqual(mockResizedImage)
expect(RNFetchBlob.config).toHaveBeenCalledWith({
fileCache: true,
appendExt: 'jpeg',
})
expect(RNFetchBlob.fetch).toHaveBeenCalledWith(
'GET',
'https://example.com/image.jpg',
)
// First time it gets called is to get dimensions
expect(manipulateAsync).toHaveBeenCalledWith(expect.any(String), [], {})
expect(manipulateAsync).toHaveBeenCalledWith(
expect.any(String),
[{resize: {height: opts.height, width: opts.width}}],
{format: SaveFormat.JPEG, compress: 1.0},
)
expect(deleteAsync).toHaveBeenCalledWith(expect.any(String), {
idempotent: true,
})
})
it('should return undefined for invalid URI', async () => {
const opts: DownloadAndResizeOpts = {
uri: 'invalid-uri',
width: 100,
height: 100,
maxSize: 500000,
mode: 'cover',
timeout: 10000,
}
const result = await downloadAndResize(opts)
expect(errorSpy).toHaveBeenCalled()
expect(result).toBeUndefined()
})
it('should return undefined for non-200 response', async () => {
const mockedFetch = RNFetchBlob.fetch as jest.Mock
mockedFetch.mockResolvedValueOnce({
path: jest.fn().mockReturnValue('file://downloaded-image'),
info: jest.fn().mockReturnValue({status: 400}),
flush: jest.fn(),
})
const opts: DownloadAndResizeOpts = {
uri: 'https://example.com/image',
width: 100,
height: 100,
maxSize: 500000,
mode: 'cover',
timeout: 10000,
}
const result = await downloadAndResize(opts)
expect(errorSpy).not.toHaveBeenCalled()
expect(result).toBeUndefined()
})
it('should not downsize whenever dimensions are below the max dimensions', () => {
const initialDimensionsOne = {
width: 1200,
height: 1000,
}
const resizedDimensionsOne = getResizedDimensions(initialDimensionsOne)
const initialDimensionsTwo = {
width: 1000,
height: 1200,
}
const resizedDimensionsTwo = getResizedDimensions(initialDimensionsTwo)
expect(resizedDimensionsOne).toEqual(initialDimensionsOne)
expect(resizedDimensionsTwo).toEqual(initialDimensionsTwo)
})
it('should resize dimensions and maintain aspect ratio if they are above the max dimensons', () => {
const initialDimensionsOne = {
width: 3000,
height: 1500,
}
const resizedDimensionsOne = getResizedDimensions(initialDimensionsOne)
const initialDimensionsTwo = {
width: 2000,
height: 4000,
}
const resizedDimensionsTwo = getResizedDimensions(initialDimensionsTwo)
expect(resizedDimensionsOne).toEqual({
width: 2000,
height: 1000,
})
expect(resizedDimensionsTwo).toEqual({
width: 1000,
height: 2000,
})
})
})
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