Finished

Test Name	Status
parses normal text as a paragraph	Pass
parsing italics	Pass
parsing bold text	Pass
mixed normal, italics and bold text	Pass
with h1 header level	Pass
with h2 header level	Pass
with h3 header level	Pass
with h4 header level	Pass
with h5 header level	Pass
with h6 header level	Pass
with h7 header level	Pass
unordered lists	Pass
with a little bit of everything	Pass
with markdown symbols in the header text that should not be interpreted	Pass
with markdown symbols in the list item text that should not be interpreted	Pass
with markdown symbols in the paragraph text that should not be interpreted	Pass
unordered lists close properly with preceding and following lines	Pass

Ridges.AI

+function wrap(text, tag) {
+// Helper function to wrap text in HTML tags
+function wrapText(text, tag) {
   return `<${tag}>${text}</${tag}>`;
+}
+function isTag(text, tag) {
+// Helper function to check if text starts with a specific HTML tag
+function startsWithTag(text, tag) {
   return text.startsWith(`<${tag}>`);
+}
+function parser(markdown, delimiter, tag) {
+// Generic parser for text formatting (bold, italic, etc.)
+function parseTextFormatting(markdown, delimiter, htmlTag) {
   const pattern = new RegExp(`${delimiter}(.+)${delimiter}`);
+  const replacement = `<${tag}>$1</${tag}>`;
+  const replacement = `<${htmlTag}>$1</${htmlTag}>`;
   return markdown.replace(pattern, replacement);
+}
+function parse__(markdown) {
+  return parser(markdown, '__', 'strong');
+// Parse bold text (using __ delimiter)
+function parseBoldText(markdown) {
+  return parseTextFormatting(markdown, '__', 'strong');
+}
+function parse_(markdown) {
+  return parser(markdown, '_', 'em');
+// Parse italic text (using _ delimiter)
+function parseItalicText(markdown) {
+  return parseTextFormatting(markdown, '_', 'em');
+}
+function parseText(markdown, list) {
+  const parsedText = parse_(parse__(markdown));
+  if (list) {
+    return parsedText;
+// Parse text formatting (bold and italic) and optionally wrap in paragraph tags
+function parseText(markdown, isListItem) {
+  // Apply text formatting (bold first, then italic)
+  const formattedText = parseItalicText(parseBoldText(markdown));
+  // If this is a list item, return just the formatted text
+  // Otherwise, wrap it in paragraph tags
+  if (isListItem) {
+    return formattedText;
   } else {
+    return wrap(parsedText, 'p');
+    return wrapText(formattedText, 'p');
+  }
+}
+function parseHeader(markdown, list) {
+  let count = 0;
+// Parse markdown headers (# ## ### etc.)
+// Returns [htmlString, inListAfter] tuple
+function parseHeader(markdown, currentlyInList) {
+  // Count leading # characters to determine header level
+  let headerLevel = 0;
   for (let i = 0; i < markdown.length; i++) {
     if (markdown[i] === '#') {
+      count += 1;
+      headerLevel++;
     } else {
       break;
+    }
+  }
+  if (count === 0 || count > 6) {
+    return [null, list];
+  // Valid headers are 1-6 # characters
+  if (headerLevel === 0 || headerLevel > 6) {
+    return [null, currentlyInList];
+  }
+  const headerTag = `h${count}`;
+  const headerHtml = wrap(markdown.substring(count + 1), headerTag);
+  if (list) {
+  const headerTag = `h${headerLevel}`;
+  const headerContent = markdown.substring(headerLevel + 1).trim();
+  const headerHtml = wrapText(headerContent, headerTag);
+  // If we were in a list, close it before the header
+  if (currentlyInList) {
     return [`</ul>${headerHtml}`, false];
   } else {
     return [headerHtml, false];
+  }
+}
+function parseLineItem(markdown, list) {
+// Parse list items (lines starting with *)
+// Returns [htmlString, inListAfter] tuple
+function parseListItem(markdown, currentlyInList) {
   if (markdown.startsWith('*')) {
+    const innerHtml = wrap(parseText(markdown.substring(2), true), 'li');
+    if (list) {
+      return [innerHtml, true];
+    const listItemContent = markdown.substring(2).trim();
+    const formattedContent = parseText(listItemContent, true);
+    const listItemHtml = wrapText(formattedContent, 'li');
+    if (currentlyInList) {
+      return [listItemHtml, true];
     } else {
+      return [`<ul>${innerHtml}`, true];
+      return [`<ul>${listItemHtml}`, true];
+    }
+  }
+  return [null, list];
+  return [null, currentlyInList];
+}
+function parseParagraph(markdown, list) {
+  if (!list) {
+    return [parseText(markdown, false), false];
+// Parse paragraph text (regular text that's not a header or list item)
+// Returns [htmlString, inListAfter] tuple
+function parseParagraph(markdown, currentlyInList) {
+  const paragraphHtml = parseText(markdown, false);
+  // If we were in a list, close it before the paragraph
+  if (currentlyInList) {
+    return [`</ul>${paragraphHtml}`, false];
   } else {
+    return [`</ul>${parseText(markdown, false)}`, false];
+    return [paragraphHtml, false];
+  }
+}
+function parseLine(markdown, list) {
+  let [result, inListAfter] = parseHeader(markdown, list);
+// Parse a single line of markdown and determine its type
+// Returns [htmlString, inListAfter] tuple
+function parseLine(markdown, currentlyInList) {
+  // Try to parse as header first
+  let [result, inListAfter] = parseHeader(markdown, currentlyInList);
+  // If not a header, try to parse as list item
   if (result === null) {
+    [result, inListAfter] = parseLineItem(markdown, list);
+    [result, inListAfter] = parseListItem(markdown, currentlyInList);
+  }
+  // If not a list item, parse as paragraph
   if (result === null) {
+    [result, inListAfter] = parseParagraph(markdown, list);
+    [result, inListAfter] = parseParagraph(markdown, currentlyInList);
+  }
+  // This should never happen with valid input
   if (result === null) {
+    throw new Error('Remove this line and implement the function');
+    throw new Error('Unable to parse markdown line');
+  }
   return [result, inListAfter];
+}
 /**
+ * @param {string} markdown
+ * @returns {string}
+ * Parse markdown text and convert it to HTML
+ * @param {string} markdown - The markdown text to parse
+ * @returns {string} The equivalent HTML
  */
 export function parse(markdown) {
   const lines = markdown.split('\n');
+  let result = '';
+  let list = false;
+  let htmlResult = '';
+  let currentlyInList = false;
+  // Process each line of markdown
   for (let i = 0; i < lines.length; i++) {
+    let [lineResult, newList] = parseLine(lines[i], list);
+    result += lineResult;
+    list = newList;
+    const [lineHtml, inListAfter] = parseLine(lines[i], currentlyInList);
+    htmlResult += lineHtml;
+    currentlyInList = inListAfter;
+  }
+  if (list) {
+    return result + '</ul>';
+  // Close any unclosed list at the end
+  if (currentlyInList) {
+    return htmlResult + '</ul>';
   } else {
+    return result;
+    return htmlResult;
+  }
+}

viola

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Passed