add tests

Co-authored-by: promptless[bot] <promptless[bot]@users.noreply.github.com>

Author: adit-chandra

tools/mdx-transform/test/transform.test.mjs

@@ -0,0 +1,31 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import {transformContent} from '../transform.mjs';
+
+const stripFrontmatter = (content) => content.replace(/^---[\s\S]*?---\n\n/, '');
+
+test('compare callout preserves inline markup', () => {
+  const input = `# Title\n\n<p><span class="compare-better">Better —</span> Keep <code>foo</code> and <a href="https://example.com">link</a>.</p>`;
+  const output = stripFrontmatter(transformContent(input));
+
+  assert.ok(output.includes('<Callout type="success" title="Better">'));
+  assert.ok(output.includes('`foo`'));
+  assert.ok(output.includes('[link](https://example.com)'));
+  assert.ok(output.includes('</Callout>'));
+});
+
+test('compare list items retain trailing content', () => {
+  const input = `# Title\n\n<ul><li><span class="compare-worse">Worse</span> <em>still works</em></li></ul>`;
+  const output = stripFrontmatter(transformContent(input));
+
+  assert.ok(output.includes('- ⚠️ Worse: '));
+  assert.ok(output.includes('*still works*'));
+});
+
+test('braces are readable and escaped for MDX', () => {
+  const input = '# Title\n\nExample {\'cpu\': \'ppc\'}';
+  const output = stripFrontmatter(transformContent(input));
+
+  assert.ok(output.includes("Example \\{'cpu': 'ppc'\\}"));
+});