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

+// Helper function to wrap text in HTML tags
 function wrap(text, tag) {
   return `<${tag}>${text}</${tag}>`;
+}
+function isTag(text, tag) {
+  return text.startsWith(`<${tag}>`);
+// Parse bold text (__text__ -> <strong>text</strong>)
+function parseBold(markdown) {
+  const pattern = /__(.+)__/g;
+  return markdown.replace(pattern, '<strong>$1</strong>');
+}
+function parser(markdown, delimiter, tag) {
+  const pattern = new RegExp(`${delimiter}(.+)${delimiter}`);
+  const replacement = `<${tag}>$1</${tag}>`;
+  return markdown.replace(pattern, replacement);
+// Parse italic text (_text_ -> <em>text</em>)
+function parseItalic(markdown) {
+  // Use lookbehind and lookahead to avoid matching underscores within words
+  const pattern = /_(.+)_/g;
+  return markdown.replace(pattern, '<em>$1</em>');
+}
+function parse__(markdown) {
+  return parser(markdown, '__', 'strong');
+// Parse inline formatting (bold and italic)
+function parseInlineFormatting(markdown) {
+  return parseItalic(parseBold(markdown));
+}
+function parse_(markdown) {
+  return parser(markdown, '_', 'em');
+}
+function parseText(markdown, list) {
+  const parsedText = parse_(parse__(markdown));
+  if (list) {
+    return parsedText;
+  } else {
+    return wrap(parsedText, 'p');
+  }
+}
+function parseHeader(markdown, list) {
+// Parse header markdown (# Header -> <h1>Header</h1>)
+function parseHeader(markdown) {
   let count = 0;
+  // Count consecutive # characters at the start
   for (let i = 0; i < markdown.length; i++) {
     if (markdown[i] === '#') {
       count += 1;
       break;
+    }
+  }
+  // Valid headers have 1-6 # characters
   if (count === 0 || count > 6) {
+    return [null, list];
+    return null;
+  }
+  // Extract header content (skip # characters and the following space)
+  const headerContent = markdown.substring(count + 1);
   const headerTag = `h${count}`;
+  const headerHtml = wrap(markdown.substring(count + 1), headerTag);
+  if (list) {
+    return [`</ul>${headerHtml}`, false];
+  } else {
+    return [headerHtml, false];
+  }
+  return wrap(parseInlineFormatting(headerContent), headerTag);
+}
+function parseLineItem(markdown, list) {
+// Parse list item (* item -> <li>item</li>)
+function parseListItem(markdown) {
   if (markdown.startsWith('*')) {
+    const innerHtml = wrap(parseText(markdown.substring(2), true), 'li');
+    if (list) {
+      return [innerHtml, true];
+    } else {
+      return [`<ul>${innerHtml}`, true];
+    }
+    // Extract list item content (skip "* " prefix)
+    const itemContent = markdown.substring(2);
+    // Parse inline formatting but don't wrap in <p> since it's in a list
+    const formattedContent = parseInlineFormatting(itemContent);
+    return wrap(formattedContent, 'li');
+  }
+  return [null, list];
+  return null;
+}
+function parseParagraph(markdown, list) {
+  if (!list) {
+    return [parseText(markdown, false), false];
+  } else {
+    return [`</ul>${parseText(markdown, false)}`, false];
+  }
+// Parse paragraph (regular text -> <p>text</p>)
+function parseParagraph(markdown) {
+  const formattedContent = parseInlineFormatting(markdown);
+  return wrap(formattedContent, 'p');
+}
+function parseLine(markdown, list) {
+  let [result, inListAfter] = parseHeader(markdown, list);
+  if (result === null) {
+    [result, inListAfter] = parseLineItem(markdown, list);
+  }
+  if (result === null) {
+    [result, inListAfter] = parseParagraph(markdown, list);
+// Parse a single line of markdown
+function parseLine(markdown) {
+  // Try to parse as header first
+  let result = parseHeader(markdown);
+  if (result !== null) {
+    return result;
+  }
+  if (result === null) {
+    throw new Error('Remove this line and implement the function');
+  // Try to parse as list item
+  result = parseListItem(markdown);
+  if (result !== null) {
+    return result;
+  }
+  return [result, inListAfter];
+  // Default to paragraph
+  return parseParagraph(markdown);
+}
 /**
+ * Parse markdown text and convert to HTML
  * @param {string} markdown
  * @returns {string}
  */
 export function parse(markdown) {
   const lines = markdown.split('\n');
+  let result = '';
+  let list = false;
+  for (let i = 0; i < lines.length; i++) {
+    let [lineResult, newList] = parseLine(lines[i], list);
+    result += lineResult;
+    list = newList;
+  let html = '';
+  let inList = false;
+  for (const line of lines) {
+    // Check if this line is a list item
+    const isListItem = line.startsWith('*');
+    // If we were in a list but this line is not a list item, close the list
+    if (inList && !isListItem) {
+      html += '</ul>';
+      inList = false;
+    }
+    // If we're not in a list but this line is a list item, start a list
+    if (!inList && isListItem) {
+      html += '<ul>';
+      inList = true;
+    }
+    // Parse the line content
+    if (isListItem) {
+      // For list items, parse without wrapping in <p>
+      const itemContent = line.substring(2); // Skip "* "
+      const formattedContent = parseInlineFormatting(itemContent);
+      html += wrap(formattedContent, 'li');
+    } else {
+      // For non-list items, parse normally
+      html += parseLine(line);
+    }
+  }
+  if (list) {
+    return result + '</ul>';
+  } else {
+    return result;
+  // Close any open list at the end
+  if (inList) {
+    html += '</ul>';
+  }
+  return html;
+}

kale

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Passed