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) {
+// Utility function to wrap text in HTML tags
+function wrapTextInTag(text, tag) {
   return `<${tag}>${text}</${tag}>`;
+}
+function isTag(text, tag) {
+// Check if text starts with a specific HTML tag
+function startsWithTag(text, tag) {
   return text.startsWith(`<${tag}>`);
+}
+function parser(markdown, delimiter, tag) {
+// Generic parser for delimiter-based markdown (bold, italic, etc.)
+function parseDelimitedText(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 parseDelimitedText(markdown, '__', 'strong');
+}
+function parse_(markdown) {
+  return parser(markdown, '_', 'em');
+// Parse italic text (using _ delimiter)
+function parseItalicText(markdown) {
+  return parseDelimitedText(markdown, '_', 'em');
+}
+function parseText(markdown, list) {
+  const parsedText = parse_(parse__(markdown));
+  if (list) {
+    return parsedText;
+// Parse inline markdown elements (bold, italic) and wrap in paragraph tags if not in a list
+function parseInlineAndWrap(markdown, inList) {
+  // First parse bold, then italic (order matters for nested elements)
+  const withBold = parseBoldText(markdown);
+  const withItalic = parseItalicText(withBold);
+  // If we're in a list, don't wrap in paragraph tags
+  if (inList) {
+    return withItalic;
   } else {
+    return wrap(parsedText, 'p');
+    return wrapTextInTag(withItalic, 'p');
+  }
+}
+function parseHeader(markdown, list) {
+  let count = 0;
+// Parse header markdown (# ## ### etc.) and handle list state transitions
+function parseHeaderLine(markdown, inList) {
+  // Count consecutive # characters at the beginning
+  let hashCount = 0;
   for (let i = 0; i < markdown.length; i++) {
     if (markdown[i] === '#') {
+      count += 1;
+      hashCount += 1;
     } else {
       break;
+    }
+  }
+  if (count === 0 || count > 6) {
+    return [null, list];
+  // Valid headers have 1-6 # characters
+  if (hashCount === 0 || hashCount > 6) {
+    return [null, inList];
+  }
+  const headerTag = `h${count}`;
+  const headerHtml = wrap(markdown.substring(count + 1), headerTag);
+  if (list) {
+  // Extract header content (skip # characters and the following space)
+  const headerContent = markdown.substring(hashCount + 1);
+  const headerTag = `h${hashCount}`;
+  const headerHtml = wrapTextInTag(headerContent, headerTag);
+  // If we were in a list, close it before starting the header
+  if (inList) {
     return [`</ul>${headerHtml}`, false];
   } else {
     return [headerHtml, false];
+  }
+}
+function parseLineItem(markdown, list) {
+// Parse list item markdown (* item) and handle list state transitions
+function parseListItemLine(markdown, inList) {
   if (markdown.startsWith('*')) {
+    const innerHtml = wrap(parseText(markdown.substring(2), true), 'li');
+    if (list) {
+      return [innerHtml, true];
+    // Extract list item content (skip '* ' prefix)
+    const itemContent = markdown.substring(2);
+    const parsedContent = parseInlineAndWrap(itemContent, true);
+    const listItemHtml = wrapTextInTag(parsedContent, 'li');
+    // If we weren't already in a list, start one
+    if (inList) {
+      return [listItemHtml, true];
     } else {
+      return [`<ul>${innerHtml}`, true];
+      return [`<ul>${listItemHtml}`, true];
+    }
+  }
+  return [null, list];
+  return [null, inList];
+}
+function parseParagraph(markdown, list) {
+  if (!list) {
+    return [parseText(markdown, false), false];
+// Parse paragraph markdown (default case) and handle list state transitions
+function parseParagraphLine(markdown, inList) {
+  // If we were in a list, close it before starting the paragraph
+  if (inList) {
+    const paragraphHtml = parseInlineAndWrap(markdown, false);
+    return [`</ul>${paragraphHtml}`, false];
   } else {
+    return [`</ul>${parseText(markdown, false)}`, false];
+    const paragraphHtml = parseInlineAndWrap(markdown, false);
+    return [paragraphHtml, false];
+  }
+}
+function parseLine(markdown, list) {
+  let [result, inListAfter] = parseHeader(markdown, list);
+// Parse a single line of markdown by trying different parsers in order
+function parseLineOfType(markdown, inList) {
+  // Try parsing as header first
+  let [result, newListState] = parseHeaderLine(markdown, inList);
+  // If not a header, try parsing as list item
   if (result === null) {
+    [result, inListAfter] = parseLineItem(markdown, list);
+    [result, newListState] = parseListItemLine(markdown, inList);
+  }
+  // If neither header nor list item, parse as paragraph
   if (result === null) {
+    [result, inListAfter] = parseParagraph(markdown, list);
+    [result, newListState] = parseParagraphLine(markdown, inList);
+  }
+  // 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: ' + markdown);
+  }
+  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 htmlResult = '';
+  let inList = 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, newInListState] = parseLineOfType(lines[i], inList);
+    htmlResult += lineHtml;
+    inList = newInListState;
+  }
+  if (list) {
+    return result + '</ul>';
+  // If we ended while still in a list, close it
+  if (inList) {
+    return htmlResult + '</ul>';
   } else {
+    return result;
+    return htmlResult;
+  }
+}

unicode

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Passed