assertTrue(result.contains("rel=\"nofollow\""));
    }

    @Test
    public void test_render_link_https() {
        String result = markdownRenderer.render("[Secure Link](https://example.com)");
        assertTrue(result.contains("<a"));
        assertTrue(result.contains("href=\"https://example.com\""));
        assertTrue(result.contains("Secure Link"));
    }

    @Test