### Question:
FlowgateKeystore { public static String getEncryptKey() { try { KeyStore.PasswordProtection keyStorePP = new KeyStore.PasswordProtection(guardStorePass.toCharArray()); KeyStore.SecretKeyEntry ske = (KeyStore.SecretKeyEntry) keyStore.getEntry(guardKeyAlias, keyStorePP); if (null == ske) { return null; } SecretKeyFactory factory = SecretKeyFactory.getInstance("PBE"); PBEKeySpec keySpec = (PBEKeySpec) factory.getKeySpec(ske.getSecretKey(), PBEKeySpec.class); return new String(keySpec.getPassword()); } catch (NoSuchAlgorithmException | UnrecoverableEntryException | KeyStoreException | InvalidKeySpecException e) { logger.error("", e); return null; } }  static void init(String keyPath, String alias, String guardPass); static Lock getWriteLock(); static Lock getReadLock(); static KeyStore loadLicenseKeyStore(); static String getKeyStoreFilePath(); static String getGuardKeyAlias(); static KeyStore setEncryptKey(String encryptKey); static String getEncryptKey(); static KeyStore getKeyStore();  }### Answer:
@Test public void testGuardStore() { Assert.assertTrue(FlowgateKeystore.getEncryptKey().length() == 16); }