How to write jasmine test case for angularjs?

How do I write a Junit test case for DAO layer in Spring by using Mockito and by creating a Mock object of EntityManager?

• I want to write a Junit test case for Dao layer in Spring using Mockito by creating mock object of EntityManager.         Below is the sample code:                      public CategoryList getAllCategoryByMerchant(String merchantId)                     throws PersistenceException, Exception {                 CategoryList categoryList = new CategoryList();                 EntityManager manager = factory.createEntityManager();                 List<Category> tempCategoryList = manager                         .createQuery(DBQueries.GET_ALL_CATEGORY_BY_MERCHANT,                                 Category.class).setParameter(1, merchantId)                         .getResultList();                 categoryList.setCategoryList(tempCategoryList);                 manager.close();                 return categoryList;                     }             I am trying to write Junit test case:      @Before      public void setUp() throws Exception {          MockitoAnnotations.initMocks(this); //Important! Mocks need to be initialized.          factory=mock(EntityManagerFactory.class);          entityManager=mock(EntityManager.class);          criteriaBuilder=mock(CriteriaBuilder.class);          criteriaQuery=mock(CriteriaQuery.class);          categoryDao =new CategoryDaoImpl();                      }     i want to write test case for above method: getAllCategoriesByStore()         i write some code shown  below:                     @Test             public void testGetAllCategoryByMerchant() throws PersistenceException,                     Exception {                         CategoryList categoryList =new CategoryList();                 List<Category> categories= new ArrayList<Category>();                 Category category1=new Category();                 category1.setCategoryName("abc");                 categories.set(1,category1);                 categoryList.setCategoryList(categories);                 Mockito.when(factory.createEntityManager()).thenReturn(entityManager);                 Mockito.when(categoryDao.getAllCategoryByMerchant("")).thenReturn(categoryList);                 assert (categoryList.getCategoryList().size() > 0);                     }

• Answer:

  In the above code, you are testing whether Java's ArrayList implementation has an appropriate size() function, which is probably not what you want: List<Category> categories= new ArrayList<Category>(); \\ Add some element to this list, then... assert (categoryList.getCategoryList().size() > 0); If the object under test is supposed to be categoryDao (which is suggested by the object instantiation in your setUp() method), then you will want to verify the interactions of THAT class. What you've done is to create a categoryDao and then have Mockito try and mock it (which must be throwing an error!) This line is the issue: Mockito.when(categoryDao.getAllCategoryByMerchant("[email protected]")).thenReturn(categoryList); You want your test along these lines: // Set up your test: String merchantId = "some-merchant-id"; List<Category> expectedCategoryList = mock(List.class); when(factory.createEntityManager()).thenReturn(entityManager); when(manager.createQuery(DBQueries.GET_ALL_CATEGORY_BY_MERCHANT, Category.class)).thenReturn(query); when(query.setParameter(1, merchantId)).thenReturn(expectedCategoryList); // Execute the behavior you want to test: categoryDao =new CategoryDaoImpl(); CategoryList result = categoryDao.getAllCategoryByMerchant(merchantId); // Verify you got what you wanted: assertEquals(result.getCategoryList(), expectedCategoryList); verify(manager).close();