// Default mode is smart_summary, so long content should be summarized
        assertTrue(history.get(1).getContent().contains("...[omitted]..."));
    }

    @Test
    public void test_extractHistory_unknownMode_returnsFull() {
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override