import assert from 'node:assert/strict';
import { describe, it } from 'node:test';
import { extractContent } from '../dist/transform/transform.js';
type MetadataCase = {
html: string;
expected: {
title?: string;
description?: string;
author?: string;
};
};
function assertMetadataCase(testCase: MetadataCase): void {
const result = extractContent(testCase.html, 'https://example.com', {
extractArticle: false,
});
assert.equal(result.metadata.title, testCase.expected.title);
assert.equal(result.metadata.description, testCase.expected.description);
assert.equal(result.metadata.author, testCase.expected.author);
assert.equal(result.article, null);
}
describe('extractContent', () => {
it('extracts metadata from title and meta tags', () => {
assertMetadataCase({
html: `
<html>
<head>
<title>Example Title</title>
<meta name="description" content="Example description" />
<meta name="author" content="Example Author" />
</head>
<body><p>Content</p></body>
</html>
`,
expected: {
title: 'Example Title',
description: 'Example description',
author: 'Example Author',
},
});
});
it('prefers OpenGraph metadata over Twitter and standard metadata', () => {
assertMetadataCase({
html: `
<html>
<head>
<title>Standard Title</title>
<meta name="description" content="Standard description" />
<meta name="twitter:title" content="Twitter Title" />
<meta name="twitter:description" content="Twitter description" />
<meta property="og:title" content=" OG Title " />
<meta property="og:description" content="OG description" />
</head>
<body><p>Content</p></body>
</html>
`,
expected: {
title: 'OG Title',
description: 'OG description',
},
});
});
it('prefers Twitter metadata over standard metadata when OpenGraph is absent', () => {
assertMetadataCase({
html: `
<html>
<head>
<title>Standard Title</title>
<meta name="description" content="Standard description" />
<meta name="twitter:title" content="Twitter Title" />
<meta name="twitter:description" content="Twitter description" />
</head>
<body><p>Content</p></body>
</html>
`,
expected: {
title: 'Twitter Title',
description: 'Twitter description',
},
});
});
it('extracts article content when enabled', () => {
const html = `
<html>
<head>
<title>Example Title</title>
</head>
<body>
<article>
<h1>Example Title</h1>
<p>Hello world</p>
</article>
</body>
</html>
`;
const result = extractContent(html, 'https://example.com', {
extractArticle: true,
});
assert.ok(result.article);
assert.ok(result.article.content.length > 0);
assert.ok(result.article.textContent.includes('Hello world'));
});
it('extracts nested article text from DOM structure', () => {
const html = `
<html>
<head>
<title>Nested Article</title>
</head>
<body>
<main>
<article>
<section>
<p>Nested content</p>
</section>
</article>
</main>
</body>
</html>
`;
const result = extractContent(html, 'https://example.com/nested', {
extractArticle: true,
});
assert.ok(result.article);
assert.ok(result.article.textContent.includes('Nested content'));
});
it('returns empty result for invalid input', () => {
const result = extractContent('', '', { extractArticle: false });
assert.equal(result.article, null);
assert.deepEqual(result.metadata, {});
});
it('extracts 32x32 favicon when declared', () => {
const html = `
<html>
<head>
<title>Favicon Test</title>
<link rel="icon" sizes="16x16" href="/icon-16.png" />
<link rel="icon" sizes="32x32" href="/icon-32.png" />
<link rel="apple-touch-icon" href="/apple-touch-icon.png" />
</head>
<body><p>Content</p></body>
</html>
`;
const result = extractContent(html, 'https://example.com', {
extractArticle: false,
});
assert.equal(result.metadata.favicon, 'https://example.com/icon-32.png');
});
it('resolves relative favicon URL against baseUrl', () => {
const html = `
<html>
<head>
<title>Favicon Test</title>
<link rel="icon" sizes="32x32" href="assets/icon.png" />
</head>
<body><p>Content</p></body>
</html>
`;
const result = extractContent(html, 'https://example.com/page/', {
extractArticle: false,
});
assert.equal(
result.metadata.favicon,
'https://example.com/page/assets/icon.png'
);
});
it('returns undefined favicon when no 32x32 icon is present', () => {
const html = `
<html>
<head>
<title>No Favicon</title>
<link rel="icon" href="/icon.png" />
<link rel="apple-touch-icon" href="/apple.png" />
</head>
<body><p>Content</p></body>
</html>
`;
const result = extractContent(html, 'https://example.com', {
extractArticle: false,
});
assert.equal(result.metadata.favicon, undefined);
});
it('handles missing favicon gracefully without baseUrl', () => {
const html = `
<html>
<head>
<title>No URL</title>
<link rel="icon" href="/icon.png" />
</head>
<body><p>Content</p></body>
</html>
`;
const result = extractContent(html, '', { extractArticle: false });
// When no baseUrl is provided, favicon extraction should not crash
// The metadata may or may not include favicon depending on implementation
assert.doesNotThrow(() => result.metadata.favicon);
});
});
