/**
   * Expects that a ConfigurationException is thrown as the policy is not configured correctly.
   *
   * @throws Throwable
   */
  @Test(expected = InvalidConfigurationException.class)
  @Configuration(EMPTY_CONFIG)
  @BackEndApi(RequiresAuthHeaderBackEndApi.class)
  public void testAuthenticatedRequestExceptionEmptyConfig() throws Throwable {
    // test data - session expires in 60s
    final Session originalSession = CommonTestUtil.insertTestSession(60, true);

    // send request with cookie
    final PolicyTestRequest request = PolicyTestRequest.build(PolicyTestRequestType.GET, RESOURCE);
    request.header(Constants.HEADER_COOKIE, CommonTestUtil.buildCookieHeader(originalSession));

    send(request);
    fail(InvalidConfigurationException.class + " expected");
  }
  /**
   * Send the request and expect a 401 Unauthorized response, and for session data to remain
   * unchanged.
   *
   * @param request the service request
   * @param originalSession the Session state before the request is made
   * @throws Throwable
   */
  private void sendAndExpect401(PolicyTestRequest request, Session originalSession)
      throws Throwable {
    try {
      send(request);
      fail(PolicyFailureError.class + " expected");

    } catch (PolicyFailureError failure) {
      assertEquals(HttpURLConnection.HTTP_UNAUTHORIZED, failure.getFailure().getFailureCode());
      assertEquals(PolicyFailureType.Authentication, failure.getFailure().getType());

      // verify the session data in the shared state has not changed
      final Session updatedSession = CommonTestUtil.fetchSession(originalSession.getSessionId());
      assertNotNull(updatedSession);
      assertEquals(originalSession.getSessionId(), updatedSession.getSessionId());

      // verify expiry not updated
      assertEquals(originalSession.getExpires(), updatedSession.getExpires());
    }
  }