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/**
* @jest-environment jsdom
*/
import { render, screen, waitFor } from '@testing-library/react';
import { SiteThumbnail } from '..';
import { fetchAwaitRedirect } from '../fetch-await-redirect';
const MSHOTS_URL = 'https://fakeUrl';
const IMG_ALT = 'test image';
jest.mock( '../fetch-await-redirect' );
describe( 'SiteThumbnail', () => {
beforeEach( () => {
jest.useFakeTimers();
jest.useFakeTimers();
// Mocking the fetch function to return response.redirect = false by default
// and to return response.redirect = true when the url is the same as the mshots url
// This is to simulate the mshots image being loaded
fetchAwaitRedirect.mockImplementation( async () => {
return {
isError: false,
isRedirect: false,
};
} );
} );
test( 'has an image that points to mshot', async () => {
render( <SiteThumbnail mShotsUrl={ MSHOTS_URL } alt={ IMG_ALT } /> );
await waitFor( () => {
expect( screen.queryByAltText( IMG_ALT ) ).not.toBeNull();
expect( screen.getByAltText( IMG_ALT ).getAttribute( 'src' ) ).toMatch(
'https://s0.wp.com/mshots/v1/' + encodeURIComponent( MSHOTS_URL )
);
} );
} );
test( 'shows fallback when mshot returns 429', async () => {
fetchAwaitRedirect.mockImplementation( async () => {
return {
isError: true,
isRedirect: false,
};
} );
render( <SiteThumbnail mShotsUrl={ MSHOTS_URL } alt={ IMG_ALT } /> );
await waitFor( () => expect( screen.queryByAltText( IMG_ALT ) ).toBeNull() );
} );
test( 'should show the dimension width for the default sizes', async () => {
const dimension = {
width: 100,
height: 100,
};
render( <SiteThumbnail mShotsUrl={ MSHOTS_URL } alt={ IMG_ALT } { ...dimension } /> );
await waitFor( () =>
expect( screen.getByAltText( IMG_ALT ).getAttribute( 'sizes' ) ).toEqual(
`${ dimension.width }px`
)
);
} );
test( 'should use the sizesAttr prop as sizes attr', async () => {
const sizesAttr = '(max-width: 400px) 100vw, 400px';
render( <SiteThumbnail mShotsUrl={ MSHOTS_URL } alt={ IMG_ALT } sizesAttr={ sizesAttr } /> );
await waitFor( () =>
expect( screen.getByAltText( IMG_ALT ).getAttribute( 'sizes' ) ).toEqual( sizesAttr )
);
} );
// eslint-disable-next-line jest/no-disabled-tests
test.skip( 'should generate responsive size alternatives 2x and 3x srcset', async () => {
const dimension = { width: 200, height: 100 };
render( <SiteThumbnail mShotsUrl={ MSHOTS_URL } alt={ IMG_ALT } { ...dimension } /> );
await waitFor( () => {
const srcset = screen.getByAltText( IMG_ALT ).getAttribute( 'srcset' );
expect( srcset ).toMatch( ` ${ dimension.width * 2 }w` );
expect( srcset ).toMatch( ` ${ dimension.width * 3 }w` );
} );
} );
// eslint-disable-next-line jest/no-disabled-tests
test.skip( 'should add dimensionsSrcSet array prop to srcset string attribute', async () => {
const alternativeDimensions = [
{
width: 777,
height: 777,
},
{
width: 888,
height: 888,
},
];
render(
<SiteThumbnail
mShotsUrl={ MSHOTS_URL }
alt={ IMG_ALT }
dimensionsSrcset={ alternativeDimensions }
/>
);
await waitFor( () => {
const srcset = screen.getByAltText( IMG_ALT ).getAttribute( 'srcset' );
alternativeDimensions.forEach( ( dimension ) => {
expect( srcset ).toMatch( ` ${ dimension.width }w` );
} );
} );
} );
test( 'empty URL will show no image cause an error', async () => {
const { rerender } = render( <SiteThumbnail mShotsUrl="" alt={ IMG_ALT } /> );
expect( screen.queryByAltText( IMG_ALT ) ).toBeNull();
rerender( <SiteThumbnail mShotsUrl={ MSHOTS_URL } alt={ IMG_ALT } /> );
await waitFor( () => {
expect( screen.queryByAltText( IMG_ALT ) ).not.toBeNull();
} );
rerender( <SiteThumbnail mShotsUrl="" alt={ IMG_ALT } /> );
expect( screen.queryByAltText( IMG_ALT ) ).toBeNull();
} );
} );
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