}

    /**
     * Test setSearcher replaces existing searcher.
     */
    @Test
    public void test_setSearcherReplacesExisting() throws Exception {
        try (RankFusionProcessor processor = new RankFusionProcessor()) {
            processor.setSearcher(new TestSearcher(50));
            processor.init();

            // Replace with new searcher
            processor.setSearcher(new TestSearcher(100));

        final AtomicInteger registeredCount = new AtomicInteger(0);

        try (RankFusionProcessor processor = new RankFusionProcessor()) {
            processor.setSearcher(new TestSearcher(100));
            processor.init();

            final ExecutorService executor = Executors.newFixedThreadPool(numThreads);
            try {
                for (int i = 0; i < numThreads; i++) {

     * If searchers list is empty, adds the searcher; otherwise, replaces the first searcher.
     *
     * @param searcher the RankFusionSearcher to set as the main searcher
     */
    public void setSearcher(final RankFusionSearcher searcher) {
        if (searchers.isEmpty()) {
            searchers.add(searcher);
        } else {
            searchers.set(0, searcher);
        }
    }

    /**

        String query = "*";
        int allRecordCount = 1000;
        int pageSize = 10;
        try (RankFusionProcessor rankFusionProcessor = new RankFusionProcessor()) {
            rankFusionProcessor.setSearcher(new TestMainSearcher(allRecordCount));
            rankFusionProcessor.init();

            if (rankFusionProcessor.search(query, new TestSearchRequestParams(0, pageSize, 0),

     */
    @Test
    public void test_searcherThrowsRuntimeException() throws Exception {
        try (RankFusionProcessor processor = new RankFusionProcessor()) {
            processor.setSearcher(new TestSearcher(100));
            processor.register(new ExceptionThrowingSearcher(new RuntimeException("Test exception")));
            processor.init();