### Question:
PolicyKeysUtil { public static List<OperationKey> getAllOperationKeyList() { return opKeys; }  static List<PolicyKey> getAllPolicyKeyList(); static List<ResourceKey> getAllResourceKeyList(); static List<OperationKey> getAllOperationKeyList(); static List<SubjectKey> getAllSubjectKeyList(); static List<SubjectGroupKey> getAllSubjectGroupKeyList();  }### Answer:
@Test public void testGetAllOperationKeyList() { assertNotNull(PolicyKeysUtil.getAllOperationKeyList()); assertEquals(3, PolicyKeysUtil.getAllOperationKeyList().size()); }