next.js/test/e2e/app-dir/metadata/app/opengraph/article/page.tsx

export default function Page() {
  return 'opengraph-article'
}

export async function generateMetadata(_props, parentResolvingMetadata) {
  const parentMetadata = await parentResolvingMetadata
  return {
    openGraph: {
      ...parentMetadata.openGraph,
      title: `My custom title | ${parentMetadata.openGraph.title.absolute}`,
      // merging parent images URL instance should work
      images: [...parentMetadata.openGraph.images],
    },
  }
}