Criteria Query Mockito unit test - NullPointerException
<p>I have a method that i'm trying to test using mockito. Below is the method i'm trying to test. I'm getting a null pointer exception when I run my test. I'm mocking Root but at accountEntity.get I'm getting null pointer. What am I missing here?</p>

<pre><code>     public List&lt;AccountEntity&gt; createCriteriaQuery(final List&lt;String&gt; accountIdList,
                    final MultiValueMap&lt;String, String&gt; allRequestParams) {

                final CriteriaBuilder cb = entityManager.getCriteriaBuilder();           
                final CriteriaQuery&lt;AccountEntity&gt; cq = cb.createQuery(AccountEntity.class);
                final Root&lt;AccountEntity&gt; accountEntity = cq.from(AccountEntity.class);

                final Join&lt;AccountEntity, PlanEntity&gt; account = accountEntity.join(AccountEntity_.planEntity);

                final List&lt;Predicate&gt; predicates = new ArrayList&lt;Predicate&gt;();

        //Getting null pointer at the below call.        

**predicates.add(accountEntity.get(AccountEntity_.id).in(accountIdList));**

    /*remaining code here/
</code></pre>

<p>below is my test. </p>

<pre><code>@InjectMocks
private AccountsDAO                         accountsDao;
@Mock
EntityManagerFactory                        entityManagerFactory;
@Mock
EntityManager                               entityManager;
@Mock
CriteriaBuilder                             cb;
@Mock
CriteriaQuery&lt;AccountEntity&gt;                cq;
@Mock
Root&lt;AccountEntity&gt;                         rootAccountEntity;
    @Test
        public void canGetAllAccountsInfo() {
        when(entityManagerFactory.createEntityManager()).thenReturn(entityManager);
        when(entityManager.getCriteriaBuilder()).thenReturn(cb); when(cb.createQuery(AccountEntity.class)).thenReturn(cq);
        when(cq.from(AccountEntity.class)).thenReturn(rootAccountEntity);
//Null pointer in the actual method call
            accountEntityList = accountsDao.createCriteriaQuery(accounIdList, allRequestParams);        
          }
</code></pre>