Function testJavaScriptSnippet

tests/snippet-validation.test.cjs:229–308

* Test a JavaScript/TypeScript snippet

(snippet)

 * Test a JavaScript/TypeScript snippet
 */
async function testJavaScriptSnippet(snippet) {
  // Detect ESM syntax and use .mjs extension to avoid Node warnings
  const hasESMSyntax = snippet.code.includes('import ') || snippet.code.includes('export ');
  const extension = hasESMSyntax ? '.mjs' : '.js';
  const tempFile = path.join(__dirname, `temp-snippet-${Date.now()}${extension}`);

  try {
    // Write snippet to temporary file
    fs.writeFileSync(tempFile, snippet.code);

    // Execute with Node.js from project root to access node_modules
    // Set auth token env var - the SDK looks for env var named by auth_token_env value
    const { stdout, stderr } = await execFileAsync('node', [tempFile], {
      timeout: 60000, // 60 second timeout (API calls can take time)
      cwd: path.join(__dirname, '..'), // Run from project root
      env: {
        ...process.env,
        [MCP_TOKEN]: MCP_TOKEN, // SDK expects env var named by token value to contain token
        [A2A_TOKEN]: A2A_TOKEN
      }
    });

    // Check if stderr contains only warnings (not errors)
    const hasRealErrors = stderr && !stderr.includes('[MODULE_TYPELESS_PACKAGE_JSON]');

    // Check if the output contains a failed API response (result.success === false)
    const apiError = checkForFailedApiResponse(stdout);
    if (apiError) {
      return {
        success: false,
        error: `API call failed: ${apiError}`,
        output: stdout,
        stderr: stderr
      };
    }

    return {
      success: true,
      output: stdout,
      error: hasRealErrors ? stderr : null
    };
  } catch (error) {
    // Tests may fail with errors but still produce valid output
    // If we got stdout output, treat it as a success (the actual test ran)
    if (error.stdout && error.stdout.trim().length > 0) {
      // But check if it's a failed API response
      const apiError = checkForFailedApiResponse(error.stdout);
      if (apiError) {
        return {
          success: false,
          error: `API call failed: ${apiError}`,
          output: error.stdout,
          stderr: error.stderr
        };
      }

      return {
        success: true,