### Question:
PolicyKeysUtil { public static List<PolicyKey> getAllPolicyKeyList() { return poKeys; }  static List<PolicyKey> getAllPolicyKeyList(); static List<ResourceKey> getAllResourceKeyList(); static List<OperationKey> getAllOperationKeyList(); static List<SubjectKey> getAllSubjectKeyList(); static List<SubjectGroupKey> getAllSubjectGroupKeyList();  }### Answer:
@Test public void testGetAllPolicyKeyList() { assertNotNull(PolicyKeysUtil.getAllPolicyKeyList()); assertEquals(4, PolicyKeysUtil.getAllPolicyKeyList().size()); }