@Test
public void updateCommentTimeTest() {

    Optional<Value> preUpdateTime = comment1.getProperty(VALUE_FACTORY.createIRI(_Thing.modified_IRI));
    manager.updateComment(comment1.getResource(), comment1);
    Optional<Value> postUpdateTime = comment1.getProperty(VALUE_FACTORY.createIRI(_Thing.modified_IRI));
    assertNotEquals(preUpdateTime.get().stringValue(), postUpdateTime.get().stringValue());
    verify(utilsService).validateResource(eq(comment1.getResource()), eq(commentFactory.getTypeIRI()), any(RepositoryConnection.class));
    verify(utilsService).updateObject(eq(comment1), any(RepositoryConnection.class));
}