assertNotNull(results);
        }
    }

    /**
     * Test handling of very slow searcher (simulates timeout scenario).
     */
    @Test
    public void test_slowSearcher() throws Exception {
        try (RankFusionProcessor processor = new RankFusionProcessor()) {
            processor.setSearcher(new TestSearcher(100));
            processor.register(new SlowSearcher(100)); // 100ms delay