dataMap.put("title", "Test Document");

        // Execute and verify exception
        try {
            indexUpdateCallback.store(paramMap, dataMap);
            fail("Should throw DataStoreException");
        } catch (DataStoreException e) {
            assertTrue(e.getMessage().contains("url is null"));
        }
    }

    @Test
    public void test_store_withLabels() {
        // Setup label matching