@Test
    public void test_render_horizontalRule() {
        String result = markdownRenderer.render("---");
        assertTrue(result.contains("<hr"));
    }

    @Test
    public void test_render_table() {
        String markdown = "| Header 1 | Header 2 |\n|----------|----------|\n| Cell 1   | Cell 2   |";
        String result = markdownRenderer.render(markdown);
        assertTrue(result.contains("<table>"));