Function saveTestOutput

src/test-utils.ts:233–244

(filename: string, data: Uint8Array)

 * ```
 */
export async function saveTestOutput(filename: string, data: Uint8Array): Promise<string> {
  const fullPath = join(TEST_OUTPUT_PATH, filename);
  const dir = join(fullPath, "..");

  // Ensure directory exists
  await mkdir(dir, { recursive: true });

  // Write the file
  await writeFile(fullPath, data);

  return fullPath;
}