Refactor: Export test case inputs for debug page

tests/5_markdown_parser/test.js

@@ -5,8 +5,12 @@ export default {
 // - You MUST use dynamic import() to load one or more libraries from a CDN to help with parsing.
 // - The function should handle: headers (h1-h6), bold, italic, links, code blocks, inline code, lists (ordered/unordered), and blockquotes.
 // - Return the resulting HTML string.`,
-  runTest: async (parseMarkdown) => {
+  getTestCases: () => {
     const markdown = `# Hello World\n\nThis is **bold** and *italic*.\n\n- Item 1\n- Item 2\n\n\`\`\`js\nconst x = 5;\n\`\`\``;
+    return [markdown];
+  },
+  runTest: async (parseMarkdown) => {
+    const [markdown] = globalThis.getTestCases ? globalThis.getTestCases() : this.getTestCases();
     const html = await parseMarkdown(markdown);
     const doc = new DOMParser().parseFromString(html, 'text/html');
     const selectors = ['h1', 'strong', 'em', 'ul', 'code'];