Hashmap containskey junit in Spring Boot-CodePudding

I have below class

 public class EmployeeService{
 
   private final EmployeeRepository employeeRepo;
   private final Map<String, Employee> cache;

   @Autowired
   public EmployeeService(EmployeeRepository employeeRepo, Map<String, Employee> cache){
     this.employeeRepo = employeeRepo;
     this.cache = cache;
   }

   public void loadFromDB(){
     //repo call
     cache.put("123", {employee object})
   }
 }

I want to write a junit for this where I need to check that value is inserted into cache. I tried below but there is no value in cache.

@Mock
private EmployeeRepository employeeRepo;

@Mock
private Map<String, Employee> cache;

@InjectMocks
private EmployeeService employeeService;

@BeforeEach
public void setUp() throws Exception {
    MockitoAnnotations.initMocks(this);
    employeeService = new EmployeeService(employeeRepo, cache);
}

@Test
public void shouldLoadDataFromDBtoCache(){
    when(employeeRepo.findActiveEmployee()).thenReturn(buildDataFromDB());
    EmployeeService.loadFromDB();
    Assertions.assertFalse(cache.isEmpty());
    //Assertions.assertTrue(cache.containsKey("1625"));
    //Assertions.assertTrue(cache.containsKey("1525"));
    //Assertions.assertFalse(cache.containsKey("1425"));
}

For cache.containsKey() getting assertion error when I check size of the cache map is zero.

Assertions.assertFalse(cache.isEmpty()); // this is success.

How can I test hashmap containsKey as above.

CodePudding user response：

From what I can see the minimal change you would need is the following:

@Mock
private EmployeeRepository employeeRepo;

private Map<String, Employee> cache = new HashMap<>();

private EmployeeService employeeService = new EmployeeService(employeeRepo, cache);

@Test
public void shouldLoadDataFromDBtoCache(){
    when(employeeRepo.findActiveEmployee()).thenReturn(buildDataFromDB());
    employeeService.loadFromDB();
    Assertions.assertFalse(cache.isEmpty());
    //Assertions.assertTrue(cache.containsKey("1625"));
    //Assertions.assertTrue(cache.containsKey("1525"));
    //Assertions.assertFalse(cache.containsKey("1425"));
}