/**
     * Test that search operations can be performed while searchers are being registered.
     * Verifies CopyOnWriteArrayList's snapshot iteration behavior.
     */
    @Test
    public void test_searchWhileRegisteringSearchers() throws Exception {
        final CountDownLatch startLatch = new CountDownLatch(1);
        final AtomicInteger searchCount = new AtomicInteger(0);
        final AtomicInteger registerCount = new AtomicInteger(0);