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import {
accumulateViewport as originAccumulateViewport,
accumulateMetadata as originAccumulateMetadata,
} from './resolve-metadata'
import type { MetadataItems as FullMetadataItems } from './resolve-metadata'
import type { Metadata, Viewport } from './types/metadata-interface'
type FullMetadataItem = FullMetadataItems[number]
type MetadataItems = [FullMetadataItem[0], FullMetadataItem[1]][]
function accumulateMetadata(metadataItems: MetadataItems) {
const fullMetadataItems: FullMetadataItems = metadataItems.map((item) => [
item[0],
item[1],
])
const route = '/test'
const pathname = Promise.resolve('/test')
return originAccumulateMetadata(route, fullMetadataItems, pathname, {
trailingSlash: false,
isStaticMetadataRouteFile: false,
})
}
function accumulateViewport(viewportExports: Viewport[]) {
// skip the first two arguments (metadata and static metadata)
return originAccumulateViewport(viewportExports.map((item) => item))
}
function mapUrlsToStrings(obj: any) {
if (typeof obj === 'object') {
for (const key in obj) {
if (obj.hasOwnProperty(key)) {
if (obj[key] instanceof URL) {
// If the property is a URL instance, convert it to a string
obj[key] = obj[key].href
} else if (typeof obj[key] === 'object') {
// Recursively process nested objects
obj[key] = mapUrlsToStrings(obj[key])
}
}
}
}
return obj
}
describe('accumulateMetadata', () => {
describe('typing', () => {
it('should support both sync and async metadata', async () => {
const metadataItems: MetadataItems = [
[{ description: 'parent' }, null],
[() => Promise.resolve({ description: 'child' }), null],
]
const metadata = await accumulateMetadata(metadataItems)
expect(metadata).toMatchObject({
description: 'child',
})
})
})
describe('title', () => {
it('should merge title with page title', async () => {
const metadataItems: MetadataItems = [
[{ title: 'root' }, null],
[{ title: 'layout' }, null],
[{ title: 'page' }, null],
]
const metadata = await accumulateMetadata(metadataItems)
expect(metadata).toMatchObject({
title: { absolute: 'page', template: null },
})
})
it('should merge title with parent layout ', async () => {
const metadataItems: MetadataItems = [
[{ title: 'root' }, null],
[
{ title: { absolute: 'layout', template: '1st parent layout %s' } },
null,
],
[
{ title: { absolute: 'layout', template: '2nd parent layout %s' } },
null,
],
[null, null], // same level layout
[{ title: 'page' }, null],
]
const metadata = await accumulateMetadata(metadataItems)
expect(metadata).toMatchObject({
title: { absolute: '2nd parent layout page', template: null },
})
})
})
describe('icon', () => {
it('should resolve icons.icon correctly', async () => {
// array icons
expect(
await accumulateMetadata([
[
{
icons: [
{
url: 'favicon-light.png',
rel: 'icon',
media: '(prefers-color-scheme: light)',
},
{
url: 'favicon-dark.png',
rel: 'icon',
media: '(prefers-color-scheme: dark)',
},
],
},
null,
],
])
).toMatchObject({
icons: {
icon: [
{
url: 'favicon-light.png',
rel: 'icon',
media: '(prefers-color-scheme: light)',
},
{
url: 'favicon-dark.png',
rel: 'icon',
media: '(prefers-color-scheme: dark)',
},
],
},
})
// string icons
expect(
await accumulateMetadata([
[
{
icons: 'favicon-light.png',
},
null,
],
])
).toMatchObject({
icons: {
icon: [
{
url: 'favicon-light.png',
},
],
},
})
// icon.icons array
expect(
await accumulateMetadata([
[
{
icons: {
icon: [
{
url: 'favicon-light.png',
},
{
url: 'favicon-dark.png',
},
],
},
},
null,
],
])
).toMatchObject({
icons: {
icon: [
{
url: 'favicon-light.png',
},
{
url: 'favicon-dark.png',
},
],
},
})
})
it('should resolve icons.apple', async () => {
expect(
await accumulateMetadata([
[
{
icons: {
apple: [
{
url: 'apple-touch-icon-light.png',
media: '(prefers-color-scheme: light)',
},
],
},
},
null,
],
])
).toMatchObject({
icons: {
apple: [
{
url: 'apple-touch-icon-light.png',
media: '(prefers-color-scheme: light)',
},
],
},
})
})
})
describe('itunes', () => {
it('should resolve relative url starting with ./ with pathname for itunes.appArgument', async () => {
const metadataItems: MetadataItems = [
[
{
metadataBase: new URL('http://test.com/base'),
itunes: { appId: 'id', appArgument: './native/app' },
},
null,
],
]
const metadata = await accumulateMetadata(metadataItems)
expect(mapUrlsToStrings(metadata)).toMatchObject(
mapUrlsToStrings({
metadataBase: new URL('http://test.com/base'),
itunes: {
appArgument: new URL('http://test.com/base/test/native/app'),
},
})
)
})
})
describe('openGraph and twitter', () => {
it('should convert string or URL images field to array, not only for basic og type', async () => {
const items: [Metadata[], Metadata][] = [
[
[{ openGraph: { type: 'article', images: 'https://test1.com' } }],
{ openGraph: { images: [{ url: new URL('https://test1.com') }] } },
],
[
[{ openGraph: { type: 'book', images: 'https://test2.com' } }],
{ openGraph: { images: [{ url: new URL('https://test2.com/') }] } },
],
[
[
{
openGraph: {
type: 'music.song',
images: new URL('https://test-og-3.com'),
},
},
],
{
openGraph: { images: [{ url: new URL('https://test-og-3.com') }] },
},
],
[
[
{
openGraph: {
type: 'music.playlist',
images: { url: 'https://test4.com' },
},
},
],
{ openGraph: { images: [{ url: new URL('https://test4.com') }] } },
],
[
[
{
openGraph: {
type: 'music.radio_station',
images: 'https://test5.com',
},
},
],
{ openGraph: { images: [{ url: new URL('https://test5.com') }] } },
],
[
[{ openGraph: { type: 'video.movie', images: 'https://test6.com' } }],
{ openGraph: { images: [{ url: new URL('https://test6.com') }] } },
],
]
items.forEach(async (item) => {
const [configuredMetadata, result] = item
const metadata = await accumulateMetadata(
configuredMetadata.map((m) => [m, null])
)
expect(mapUrlsToStrings(metadata)).toMatchObject(
mapUrlsToStrings(result)
)
})
})
it('should fill twitter with partial existing openGraph metadata', async () => {
const metadataItems: MetadataItems = [
[
{
openGraph: {
title: 'title',
description: 'description',
images: 'https://test.com',
},
twitter: {
card: 'summary_large_image',
},
},
null,
],
]
const metadata = await accumulateMetadata(metadataItems)
expect(metadata).toMatchObject({
openGraph: {
title: {
absolute: 'title',
template: null,
},
description: 'description',
images: [{ url: new URL('https://test.com') }],
},
twitter: {
card: 'summary_large_image',
title: {
absolute: 'title',
template: null,
},
description: 'description',
images: [{ url: new URL('https://test.com') }],
},
})
})
it('should prefer title and description from openGraph rather than metadata for twitter', async () => {
const metadataItems: MetadataItems = [
[
{
title: 'doc title',
openGraph: {
title: 'og-title',
description: 'og-description',
images: 'https://test.com',
},
},
null,
],
]
const metadata = await accumulateMetadata(metadataItems)
expect(metadata).toMatchObject({
openGraph: {
title: {
absolute: 'og-title',
template: null,
},
description: 'og-description',
images: [{ url: new URL('https://test.com') }],
},
twitter: {
card: 'summary_large_image',
title: {
absolute: 'og-title',
template: null,
},
description: 'og-description',
images: [{ url: new URL('https://test.com') }],
},
})
})
it('should fill only the existing props from openGraph to twitter', async () => {
const metadataItems: MetadataItems = [
[
{
openGraph: {
// skip title
description: 'description',
},
},
// has static metadata files
{
icon: undefined,
apple: undefined,
twitter: ['/og/twitter.png'],
openGraph: undefined,
manifest: undefined,
},
],
]
const metadata = await accumulateMetadata(metadataItems)
expect(metadata).toMatchObject({
openGraph: {
title: {
absolute: '',
template: null,
},
description: 'description',
},
twitter: {
title: {
absolute: '',
template: null,
},
description: 'description',
},
})
})
it('should resolve relative url starting with ./ with pathname for openGraph.url', async () => {
const metadataItems: MetadataItems = [
[
{
metadataBase: new URL('http://test.com/base'),
openGraph: {
url: './abc',
},
},
null,
],
]
const metadata = await accumulateMetadata(metadataItems)
expect(mapUrlsToStrings(metadata)).toMatchObject(
mapUrlsToStrings({
metadataBase: new URL('http://test.com/base'),
openGraph: {
url: new URL('http://test.com/base/test/abc'),
},
})
)
})
it('should override openGraph or twitter images when current layer specifies social images properties', async () => {
const metadataItems1: MetadataItems = [
[
{
openGraph: {
images: 'https://test.com/og.png',
},
twitter: {
images: 'https://test.com/twitter.png',
},
},
// has static metadata files
{
icon: undefined,
apple: undefined,
twitter: ['/filebased/twitter.png'],
openGraph: ['/filebased/og.png'],
manifest: undefined,
},
],
]
const metadata1 = await accumulateMetadata(metadataItems1)
expect(metadata1).toMatchObject({
openGraph: {
images: [{ url: new URL('https://test.com/og.png') }],
},
twitter: {
images: [{ url: new URL('https://test.com/twitter.png ') }],
},
})
const metadataItems2: MetadataItems = [
[
function gM2() {
return {
openGraph: {
images: undefined,
},
// twitter is not specified, supposed to merged with openGraph but images should not be picked up
}
},
// has static metadata files
{
icon: undefined,
apple: undefined,
twitter: undefined,
openGraph: ['/filebased/og.png'],
manifest: undefined,
},
],
]
const metadata2 = await accumulateMetadata(metadataItems2)
expect(metadata2).toMatchObject({
openGraph: {
images: undefined,
},
twitter: {
images: undefined,
},
})
})
it('should inherit metadata title description into openGraph or twitter if they are configured', async () => {
const metadataItems1: MetadataItems = [
[
{
title: 'My title',
description: 'My description',
openGraph: {
images: 'https://test.com/og.png',
},
},
null,
],
]
const metadata1 = await accumulateMetadata(metadataItems1)
expect(metadata1).toMatchObject({
openGraph: {
title: {
absolute: 'My title',
template: null,
},
description: 'My description',
},
twitter: {
title: {
absolute: 'My title',
template: null,
},
description: 'My description',
},
})
const metadataItems2: MetadataItems = [
[
{
title: 'My title',
description: 'My description',
twitter: {
images: 'https://test.com/twitter.png',
},
},
null,
],
]
const metadata2 = await accumulateMetadata(metadataItems2)
expect(metadata2).toMatchObject({
openGraph: null,
twitter: {
title: {
absolute: 'My title',
template: null,
},
description: 'My description',
},
})
// Don't override if there's already a title in twitter
const metadataItems3: MetadataItems = [
[
{
title: 'My title',
description: 'My description',
twitter: {
title: 'My twitter title',
images: 'https://test.com/twitter.png',
},
},
null,
],
]
const metadata3 = await accumulateMetadata(metadataItems3)
expect(metadata3).toMatchObject({
openGraph: null,
title: {
absolute: 'My title',
template: null,
},
twitter: {
title: {
absolute: 'My twitter title',
template: null,
},
description: 'My description',
},
})
})
})
describe('alternate', () => {
it('should support string alternate', async () => {
const metadataItems: MetadataItems = [
[
{
alternates: {
canonical: '/relative',
languages: {
'en-US': 'https://example.com/en-US',
'de-DE': 'https://example.com/de-DE',
},
media: {
'only screen and (max-width: 600px)': '/mobile',
},
types: {
'application/rss+xml': 'https://example.com/rss',
},
},
},
null,
],
]
const metadata = await accumulateMetadata(metadataItems)
expect(metadata).toMatchObject({
alternates: {
canonical: { url: '/relative' },
languages: {
'en-US': [{ url: 'https://example.com/en-US' }],
'de-DE': [{ url: 'https://example.com/de-DE' }],
},
media: {
'only screen and (max-width: 600px)': [{ url: '/mobile' }],
},
types: {
'application/rss+xml': [{ url: 'https://example.com/rss' }],
},
},
})
})
it('should support string alternate canonical with search params', async () => {
const metadataItems: MetadataItems = [
[
{
alternates: {
canonical: 'https://localhost:3000/test?foo=bar',
languages: {
'en-US': 'https://example.com/en-US',
'de-DE': 'https://example.com/de-DE',
},
media: {
'only screen and (max-width: 600px)': '/mobile',
},
types: {
'application/rss+xml': 'https://example.com/rss',
},
},
},
null,
],
]
const metadata = await accumulateMetadata(metadataItems)
expect(metadata).toMatchObject({
alternates: {
canonical: { url: 'https://localhost:3000/test?foo=bar' },
languages: {
'en-US': [{ url: 'https://example.com/en-US' }],
'de-DE': [{ url: 'https://example.com/de-DE' }],
},
media: {
'only screen and (max-width: 600px)': [{ url: '/mobile' }],
},
types: {
'application/rss+xml': [{ url: 'https://example.com/rss' }],
},
},
})
})
it('should support URL alternate canonical with search params', async () => {
const metadataItems: MetadataItems = [
[
{
alternates: {
canonical: new URL('https://localhost:3000/test?foo=bar'),
languages: {
'en-US': 'https://example.com/en-US',
'de-DE': 'https://example.com/de-DE',
},
media: {
'only screen and (max-width: 600px)': '/mobile',
},
types: {
'application/rss+xml': 'https://example.com/rss',
},
},
},
null,
],
]
const metadata = await accumulateMetadata(metadataItems)
expect(metadata).toMatchObject({
alternates: {
canonical: { url: 'https://localhost:3000/test?foo=bar' },
languages: {
'en-US': [{ url: 'https://example.com/en-US' }],
'de-DE': [{ url: 'https://example.com/de-DE' }],
},
media: {
'only screen and (max-width: 600px)': [{ url: '/mobile' }],
},
types: {
'application/rss+xml': [{ url: 'https://example.com/rss' }],
},
},
})
})
it('should support alternate descriptors', async () => {
const metadataItems: MetadataItems = [
[
{
alternates: {
canonical: '/relative',
languages: {
'en-US': [
{ url: '/en-US', title: 'en' },
{ url: '/zh_CN', title: 'zh' },
],
},
media: {
'only screen and (max-width: 600px)': [
{ url: '/mobile', title: 'mobile' },
],
},
types: {
'application/rss+xml': 'https://example.com/rss',
},
},
},
null,
],
]
const metadata = await accumulateMetadata(metadataItems)
expect(metadata).toMatchObject({
alternates: {
canonical: { url: '/relative' },
languages: {
'en-US': [
{ url: '/en-US', title: 'en' },
{ url: '/zh_CN', title: 'zh' },
],
},
media: {
'only screen and (max-width: 600px)': [
{ url: '/mobile', title: 'mobile' },
],
},
types: {
'application/rss+xml': [{ url: 'https://example.com/rss' }],
},
},
})
})
})
})
describe('accumulateViewport', () => {
describe('viewport', () => {
it('should support viewport descriptors', async () => {
const viewport = await accumulateViewport([
{
width: 'device-width',
height: 'device-height',
initialScale: 1,
minimumScale: 1,
maximumScale: 1,
viewportFit: 'cover',
userScalable: false,
interactiveWidget: 'overlays-content',
},
])
expect(viewport).toMatchObject({
width: 'device-width',
height: 'device-height',
initialScale: 1,
minimumScale: 1,
maximumScale: 1,
viewportFit: 'cover',
userScalable: false,
interactiveWidget: 'overlays-content',
})
})
it('should skip viewport.initialScale if it is set undefined explicitly', async () => {
const viewport = await accumulateViewport([{ initialScale: undefined }])
expect(viewport).toMatchObject({
width: 'device-width',
initialScale: undefined,
})
})
})
describe('themeColor', () => {
it('should support string theme color', async () => {
const metadataItems: Viewport[] = [
{ themeColor: '#000' },
{ themeColor: '#fff' },
]
const viewport = await accumulateViewport(metadataItems)
expect(viewport).toMatchObject({
themeColor: [{ color: '#fff' }],
})
})
it('should support theme color descriptors', async () => {
const viewportInput1: Viewport[] = [
{
themeColor: {
media: '(prefers-color-scheme: light)',
color: '#fff',
},
},
{
themeColor: {
media: '(prefers-color-scheme: dark)',
color: 'cyan',
},
},
]
const viewport1 = await accumulateViewport(viewportInput1)
expect(viewport1).toMatchObject({
themeColor: [{ media: '(prefers-color-scheme: dark)', color: 'cyan' }],
})
const viewportInput2: Viewport[] = [
{
themeColor: [
{ media: '(prefers-color-scheme: light)', color: '#fff' },
{ media: '(prefers-color-scheme: dark)', color: 'cyan' },
],
},
]
const viewport2 = await accumulateViewport(viewportInput2)
expect(viewport2).toMatchObject({
themeColor: [
{ media: '(prefers-color-scheme: light)', color: '#fff' },
{ media: '(prefers-color-scheme: dark)', color: 'cyan' },
],
})
})
})
})
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