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>)
+// Uses greedy matching to preserve original behavior exactly
+function parseBold(markdown) {
+  return markdown.replace(/__(.+)__/g, '<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>)
+// Uses greedy matching to preserve original behavior exactly
+function parseItalic(markdown) {
+  return markdown.replace(/_(.+)_/g, '<em>$1</em>');
+}
+function parse__(markdown) {
+  return parser(markdown, '__', 'strong');
+// Parse inline formatting (bold and italic)
+function parseInlineFormatting(markdown) {
+  // Apply bold formatting first, then italic
+  return parseItalic(parseBold(markdown));
+}
+function parse_(markdown) {
+  return parser(markdown, '_', 'em');
+// Parse text with optional paragraph wrapping
+function parseText(markdown, isListItem = false) {
+  const parsedText = parseInlineFormatting(markdown);
+  // Only wrap in <p> tags if not part of a list item
+  return isListItem ? parsedText : wrap(parsedText, 'p');
+}
+function parseText(markdown, list) {
+  const parsedText = parse_(parse__(markdown));
+  if (list) {
+    return parsedText;
+  } else {
+    return wrap(parsedText, 'p');
+  }
+}
+function parseHeader(markdown, list) {
+// Parse header elements (# Header -> <h1>Header</h1>)
+function parseHeader(markdown, currentlyInList) {
+  // Count consecutive # characters at the start of the line
   let count = 0;
   for (let i = 0; i < markdown.length; i++) {
     if (markdown[i] === '#') {
       break;
+    }
+  }
+  // Valid headers have 1-6 # characters
   if (count === 0 || count > 6) {
+    return [null, list];
+    return [null, currentlyInList];
+  }
+  // Extract header content (text after # characters and space)
+  const headerContent = markdown.substring(count + 1);
   const headerTag = `h${count}`;
+  const headerHtml = wrap(markdown.substring(count + 1), headerTag);
+  if (list) {
+  const headerHtml = wrap(headerContent, headerTag);
+  // If we were in a list, close it before the header
+  if (currentlyInList) {
     return [`</ul>${headerHtml}`, false];
   } else {
     return [headerHtml, false];
+  }
+}
+function parseLineItem(markdown, list) {
+// Parse list items (* item -> <li>item</li>)
+function parseLineItem(markdown, currentlyInList) {
   if (markdown.startsWith('*')) {
+    const innerHtml = wrap(parseText(markdown.substring(2), true), 'li');
+    if (list) {
+    // Extract list item content (text after '* ')
+    const itemContent = markdown.substring(2);
+    const innerHtml = wrap(parseText(itemContent, true), 'li');
+    if (currentlyInList) {
+      // Continue existing list
       return [innerHtml, true];
     } else {
+      // Start new list
       return [`<ul>${innerHtml}`, true];
+    }
+  }
+  return [null, list];
+  return [null, currentlyInList];
+}
+function parseParagraph(markdown, list) {
+  if (!list) {
+    return [parseText(markdown, false), false];
+  } else {
+// Parse paragraph elements
+function parseParagraph(markdown, currentlyInList) {
+  if (currentlyInList) {
+    // If we were in a list, close it before starting a paragraph
     return [`</ul>${parseText(markdown, false)}`, false];
+  } else {
+    // Regular paragraph
+    return [parseText(markdown, false), false];
+  }
+}
+function parseLine(markdown, list) {
+  let [result, inListAfter] = parseHeader(markdown, list);
+// Parse a single line of markdown
+function parseLine(markdown, currentlyInList) {
+  // Try parsing as header first
+  let [result, newListState] = parseHeader(markdown, currentlyInList);
+  // If not a header, try parsing as list item
   if (result === null) {
+    [result, inListAfter] = parseLineItem(markdown, list);
+    [result, newListState] = parseLineItem(markdown, currentlyInList);
+  }
+  // If not a list item, parse as regular paragraph
   if (result === null) {
+    [result, inListAfter] = parseParagraph(markdown, list);
+    [result, newListState] = 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('Invalid markdown line');
+  }
+  return [result, inListAfter];
+  return [result, newListState];
+}
 /**
+ * @param {string} markdown
+ * @returns {string}
+ * Parse markdown text and convert it to HTML
+ * @param {string} markdown - The markdown text to parse
+ * @returns {string} - The resulting HTML
  */
 export function parse(markdown) {
   const lines = markdown.split('\n');
   let result = '';
+  let list = false;
+  let currentlyInList = false;
+  // Process each line of markdown
   for (let i = 0; i < lines.length; i++) {
+    let [lineResult, newList] = parseLine(lines[i], list);
+    let [lineResult, newListState] = parseLine(lines[i], currentlyInList);
     result += lineResult;
+    list = newList;
+    currentlyInList = newListState;
+  }
+  if (list) {
+    return result + '</ul>';
+  } else {
+    return result;
+  // Close any open list at the end of the document
+  if (currentlyInList) {
+    result += '</ul>';
+  }
+  return result;
+}

tobe

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Passed