test: add tests for readme Markdown content extraction

Author: carwack

test/unit/server/utils/readme.spec.ts

@@ -307,3 +307,24 @@ describe('Markdown File URL Resolution', () => {
     })
   })
 })
+
+describe('Markdown Content Extraction', () => {
+  describe('Markdown', () => {
+    it('returns original markdown content unchanged', async () => {
+      const markdown = `# Title\n\nSome **bold** text and a [link](https://example.com).`
+      const result = await renderReadmeHtml(markdown, 'test-pkg')
+
+      expect(result.md).toBe(markdown)
+    })
+  })
+  describe('HTML', () => {
+    it('returns sanitized html', async () => {
+      const markdown = `# Title\n\nSome **bold** text and a [link](https://example.com).`
+      const result = await renderReadmeHtml(markdown, 'test-pkg')
+
+      expect(result.html).toBe(`<h3 id="user-content-title" data-level="1">Title</h3>
+<p>Some <strong>bold</strong> text and a <a href="https://example.com" rel="nofollow noreferrer noopener" target="_blank">link</a>.</p>
+`)
+    })
+  })
+})