Function assertContains

scripts/generate-schema-docs.test.js:27–35

* Test helper to check if output contains expected content

(content, expected, testName)

 * Test helper to check if output contains expected content
 */
function assertContains(content, expected, testName) {
  if (!content.includes(expected)) {
    console.error(`❌ FAIL: ${testName}`);
    console.error(`   Expected to find: "${expected}"`);
    return false;
  }
  console.log(`✓ PASS: ${testName}`);
  return true;
}

/**
 * Test helper to check if output does NOT contain unexpected content