#vulnerable code 
                                @Test
    public void shouldSetCollectionAutomatically() {
        User user = new User();
        assertNotNull(user.getLikes());
        assertTrue(user.getLikes().getClass().equals(RedisList.class));
        assertTrue(user.getPurchases().getClass().equals(RedisSet.class));
        assertTrue(user.getFavoritePurchases().getClass()
                .equals(RedisMap.class));
    } 
                            #location 5 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Test
    public void shouldSetCollectionAutomatically() {
        User user = new User();
        assertNotNull(user.getLikes());
        assertTrue(user.getLikes().getClass().equals(RedisList.class));
        assertTrue(user.getPurchases().getClass().equals(RedisSet.class));
        assertTrue(user.getFavoritePurchases().getClass()
                .equals(RedisMap.class));
        assertTrue(user.getOrderedPurchases().getClass().equals(
                RedisSortedSet.class));

    }