Fix failing tests and add unit tests

lib/content.js

@@ -8,11 +8,24 @@ import { validateBlogPost, sanitizeBlogPost } from "./validation.js";
  */
 
 /**
- * Convert markdown content to HTML with basic formatting
- * @param {string} markdown - Raw markdown content
- * @returns {string} HTML content
+ * Generate a URL-friendly slug from a string
+ * @param {string} text - Text to convert to slug
+ * @returns {string} URL-friendly slug
  */
-function markdownToHtml(markdown) {
+function generateSlug(text) {
+  return text
+    .toLowerCase()
+    .replace(/[^\w\s-]/g, "") // Remove special characters
+    .replace(/\s+/g, "-") // Replace spaces with hyphens
+    .replace(/-+/g, "-") // Replace multiple hyphens with single
+    .trim();
+}
+
+/**
+ * Get all blog post files from the content directory
+ * @returns {Array} Array of file paths
+ */
+export function markdownToHtml(markdown) {
   if (!markdown) return "";
 
   return (
@@ -41,24 +54,6 @@ function markdownToHtml(markdown) {
   );
 }
 
-/**
- * Generate a URL-friendly slug from a string
- * @param {string} text - Text to convert to slug
- * @returns {string} URL-friendly slug
- */
-function generateSlug(text) {
-  return text
-    .toLowerCase()
-    .replace(/[^\w\s-]/g, "") // Remove special characters
-    .replace(/\s+/g, "-") // Replace spaces with hyphens
-    .replace(/-+/g, "-") // Replace multiple hyphens with single
-    .trim();
-}
-
-/**
- * Get all blog post files from the content directory
- * @returns {Array} Array of file paths
- */
 export function getBlogPostFiles() {
   const contentDirectory = path.join(process.cwd(), "content/blog");