#Mock objects returning null - junit

Question

So I have code below-
#RunWith(MockitoJUnitRunner.class)
public class TeamSubscriptionServiceTest {
#InjectMocks
private TeamSubscriptionService teamSubscriptionService;
#Mock
private ImsCustomerProfileService imsService;
#Mock
private IUserService userService;
#Mock
private HttpRequestService httpRequestService;
#Mock
private ISubscriptionDbService subscriptionDbService;
private String imsToken = "IMS_Token";
#Before
public void setup() {
MockitoAnnotations.initMocks(this);
when(imsService.getAccessToken()).thenReturn(imsToken);
ReflectionTestUtils.setField(teamSubscriptionService, "jilEndpoint", "www.testJil.com");
ReflectionTestUtils.setField(teamSubscriptionService, "adobeIOApiKey", "api_key");
}
#Test(groups = { TestGroup.UNIT_TESTS })
public void testAddSeat() throws IOException {
String teamId = "TestTeamID";
String locale = "En_US";
String jasonValue = "TestJasonData";
String apiCallContent = "addSeatAPIResult";
HttpResponse addSeatResponse = mock(HttpResponse.class);
when(addSeatResponse.getCode()).thenReturn(200);
when(addSeatResponse.getContent()).thenReturn(apiCallContent);
HttpServletResponse response = mock(HttpServletResponse.class);
when(httpRequestService.makeHttpRequest(anyString(),anyString(),anyMap(),anyString())).thenReturn(addSeatResponse);
String result = teamSubscriptionService.addSeat(teamId,locale,jasonValue,response);
assertNotNull(result);
assertEquals(result, "addSeatAPIResult");
}
}
When I test it I get a NullPointerException on the line
when(httpRequestService.makeHttpRequest(anyString(),anyString(),anyMap(),anyString())).thenReturn(addSeatResponse);
I feel that all the objects annotated with #Mock are somehow null and the object are not getting injected to the teamSubscriptionService object.
Any Idea whats wrong with the code?

Answer 1

The problem is that you are mixing TestNG and JUnit annotations.
Test method is annotated with #Test(groups = { TestGroup.UNIT_TESTS }) - it is clearly a TestNG annotation #org.testng.annotations.Test, because JUnit's equivalent does not have element called groups.
However, you are using JUnit's #Before annotation on setup() method, therefore this method is never invoked. TestNG equivalent for this annotation is #org.testng.annotations.BeforeTest. Use it instead.
<...>
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
<...>
public class TeamSubscriptionServiceTest {
#InjectMocks
private TeamSubscriptionService teamSubscriptionService;
#Mock
private ImsCustomerProfileService imsService;
#Mock
private IUserService userService;
#Mock
private HttpRequestService httpRequestService;
#Mock
private ISubscriptionDbService subscriptionDbService;
private String imsToken = "IMS_Token";
#BeforeTest
public void setup() {
MockitoAnnotations.initMocks(this);
<...>
}
#Test(groups = { TestGroup.UNIT_TESTS })
public void testAddSeat() throws IOException {
<...>
}
}
As a side note, #RunWith(MockitoJUnitRunner.class) is redundant as well, when using TestNG.