Unit Testing with Spring-MVC-Test - @Autowire attributes are null

[DJC_Spring]

Hi guys,

Im confused when trying to write a unit test for my rest controller as I cannot seem to mock my @Autowire properties in the controller.

Here is my Test

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration()
public class RegistrationControllerTesting {
	
	private MockMvc mockMvc;
	private LicenseSecurityContextHelper licenseSecurityContextHelper;
	        
	private ILicenseAuthentication licenseAuthentication;
	
	@Before
	public void setup() {		
		licenseAuthentication = mock(LicenseAuthentication.class);
		mockMvc = MockMvcBuilders.standaloneSetup(new RegistrationController()).build();
		licenseSecurityContextHelper = mock(LicenseSecurityContextHelper.class);
		when(licenseSecurityContextHelper.getLicenseAuthentication()).thenReturn(licenseAuthentication);
	}
	
	@Test
	public void test() throws Exception {		
		DefaultRequestBuilder requestBuilder = MockMvcRequestBuilders.post("/rest/auth/register")
			.contentType(MediaType.APPLICATION_JSON)
			.body(JsonHelperProvider.registrationJson.getBytes());
		mockMvc.perform(requestBuilder);

	}

My config in RegistrationControllerTesting-context.xml

<bean id="licenseSecurityContextHelper" class="org.mockito.Mockito" factory-method="mock"> 
 		<constructor-arg value="uk.co.company.common.license.spring.LicenseSecurityContextHelper" />
 	</bean> 
		
	<bean id="rollupScheduleService" class="org.mockito.Mockito" factory-method="mock">
		<constructor-arg value="uk.co.company.product.service.IRollupScheduleService" />
	</bean>
	
	<bean id="productApplicationContextService" class="org.mockito.Mockito" factory-method="mock">
		<constructor-arg value="uk.co.company.product.service.IproductApplicationContextService" />
	</bean>

My controller has autowire fields

@Autowired
private IproductApplicationContextService productApplicationContextService;
	
@Autowired
private IRollupScheduleService rollupScheduleService;
	
@Autowired
private LicenseSecurityContextHelper licenseSecurityContextHelper;

However in my controller the object licenseSecurityContextHelper is null i.e

ILicenseAuthentication licenseAuthentication = licenseSecurityContextHelper.getLicenseAuthentication();

Im confused because the beans seem to be autowired in the log file. I proved this by removing the mocked bean definitions from my xml config and this produces the error

"Could not autowire field: private uk.co.company.product.service.IproductApplicationContextService"

Can someone please tell me what ive done wrong?

[DJC_Spring]

Hi everyone,

I resolved the problem and posting the solution here to help others .

First off my problem was that I was using the standaloneSetup method from the MockMVCBuilders class. This does not use the configuration that I loaded from the @ContextConfiguation annotation (i.e RegistrationControllerTesting-context.xml)

So it was simply a case of using the MockMVCBuilders.xmlConfigSetup to load in my servlet context and mock objects and remove the @ContextConfiguration.

So the code:

This example uses spring-test-mvc and loads in the servlet context from an xml file and injects mocked objects into the controllers @Autowired attributes. It calls a rest service passing in some Json.

RegistrationControllerTesting-context.xml

<bean id="licenseSecurityContextHelper" class="org.mockito.Mockito" factory-method="mock"> 
 		<constructor-arg value="uk.co.company.common.license.spring.LicenseSecurityContextHelper" />
 	</bean> 
		
	<bean id="rollupScheduleService" class="org.mockito.Mockito" factory-method="mock">
		<constructor-arg value="uk.co.company.product.service.RollupScheduleService" />
	</bean>
	
	<bean id="productApplicationContextService" class="org.mockito.Mockito" factory-method="mock">
		<constructor-arg value="uk.co.company.product.service.ProductApplicationContextService" />
	</bean>
	
	<mvc:annotation-driven />

	<context:component-scan base-package="uk.co.company.product.mvc" />

	<mvc:resources mapping="/resources/**" location="/resources/" />

	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/views/" />
		<property name="suffix" value=".jsp" />
	</bean>

Unit Test Case

public class RegistrationControllerTesting {
	
	private MockMvc mockMvc;
	private LicenseSecurityContextHelper licenseSecurityContextHelper;
	        
	private ILicenseAuthentication licenseAuthentication;
	
	
	@Before
	public void setup() {
		
		licenseAuthentication = mock(LicenseAuthentication.class);
		licenseSecurityContextHelper = mock(LicenseSecurityContextHelper.class);
		mockMvc = MockMvcBuilders.xmlConfigSetup("classpath:uk/co/company/product/mvc/rest/RegistrationControllerTesting-context.xml").build();
		when(licenseSecurityContextHelper.getLicenseAuthentication()).thenReturn(licenseAuthentication);
		
	}
	
	@Test
	public void test() throws Exception {		
		DefaultRequestBuilder requestBuilder = MockMvcRequestBuilders.post("/rest/auth/register")
			.contentType(MediaType.APPLICATION_JSON)
			.body(JsonHelperProvider.registrationJson.getBytes());
		mockMvc.perform(requestBuilder);

	}

Controller

public final class RegistrationController {
	
	private static final Logger logger = Logger.getLogger(RegistrationController.class);
	
	@Autowired
	private IProductApplicationContextService productApplicationContextService;
	
	@Autowired
	private IRollupScheduleService rollupScheduleService;
	
	@Autowired
	private LicenseSecurityContextHelper licenseSecurityContextHelper;

	
	public RegistrationController() {
		logger.info(RegistrationController.class);
	}
	
	@RequestMapping(value = "/register", method=RequestMethod.POST, headers="Content-Type=application/json")
	@ResponseBody
	public ProductApplicationContext registerApplication(@RequestBody ApplicationDetails incomingContext) {
		
		ILicenseAuthentication licenseAuthentication = licenseSecurityContextHelper.getLicenseAuthentication();

…..

}

Hope it helps others.