generateFromPattern function exported ✓ 100.0%

export function generateFromPattern(pattern = "########"): string {
  let result = "";
  let i = 0;

  while (i < pattern.length) {
    const ch = pattern[i];

    // Escape: next character is literal
    if (ch === "\\" && i + 1 < pattern.length) {
      result += pattern[i + 1];
      i += 2;
      continue;
    }

    switch (ch) {
      case "#":
        result += randomChar(DIGITS);
        break;
      case "A":
        result += randomChar(UPPER);
        break;
      case "a":
        result += randomChar(LOWER);
        break;
      case "?":
        result += randomChar(ALPHA);
        break;
      case "*":
        result += randomChar(ALNUM);
        break;
      default:
        result += ch;
    }

    i++;
  }

  return result;
}