Hybris commerce - synchronization integration test

I'm beginner in a hybris е-commerce. I need the integration test with synchronization product catalogs, but I have a problem while synchronization. I added new product attribute - "classification" and setup value for this attribute in test. Then performCronJob method did syncJob from Staged product catalog, to Online product catalog. Now, when got the product from Online catalog, it not have value for "classification" attribute and occur AssertionError. Tell me please, why this happens. This is my test.

@RunWith(HybrisJUnit4ClassRunner.class)
@RunListeners(
{ TransactionRunListener.class, ItemCreationListener.class, LogRunListener.class, PlatformRunListener.class })
@Transactional
public class ProductMyIntegrationTest extends ServicelayerTransactionalTest
{
    @Resource
    private TypeService typeService;
    @Resource
    private ModelService modelService;
    @Resource
    private CatalogVersionService catalogVersionService;
    @Resource
    private ProductService productService;
    @Resource
    private CronJobService cronJobService;

    public ProductService getProductService()
    {
        return productService;
    }

    public CatalogVersionService getCatalogVersionService()
    {
        return catalogVersionService;
    }

    public TypeService getTypeService()
    {
        return typeService;
    }

    public ModelService getModelService()
    {
        return modelService;
    }

    @Test
    public void testProductSyncBehavior()
    {
        final CatalogVersionModel catalogStagedVersionModel = getCatalogVersionService().getCatalogVersion("hybrisProductCatalog",
                "Staged");
        final CatalogVersionModel catalogOnlineVersionModel = getCatalogVersionService().getCatalogVersion("hybrisProductCatalog",
                "Online");
        final Collection<CatalogVersionModel> coll = new ArrayList<>();
        coll.add(catalogOnlineVersionModel);
        coll.add(catalogStagedVersionModel);
        catalogVersionService.setSessionCatalogVersions(coll);

        final ProductModel product = productService.getProduct(catalogStagedVersionModel, "0100");
        product.setClassification("RRRRRRR");
        getModelService().save(product);

        cronJobService.performCronJob((CatalogVersionSyncCronJobModel) modelService.get(PK.fromLong(8796453503477L)), true);

        final ProductModel prodOnline = modelService.get(productService.getProduct(catalogOnlineVersionModel, "0100").getPk());
        final ProductModel prodStaged = modelService.get(productService.getProduct(catalogStagedVersionModel, "0100").getPk());
        Assert.assertNotNull(prodOnline.getClassification());
    }
}

AssertionError:

java.lang.AssertionError
    at org.junit.Assert.fail(Assert.java:86)
    at org.junit.Assert.assertTrue(Assert.java:41)
    at org.junit.Assert.assertNotNull(Assert.java:712)
    at org.junit.Assert.assertNotNull(Assert.java:722)
    at de.hybris.merchandise.core.product.classification.ProductMyIntegrationTest.testProductSyncBehavior(ProductMyIntegrationTest.java:91)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)...

Thank you very much.