How to Mock Service class while writing a Junit for Spring-ws endpoint - junit

Question

I have created a Spring SOAP based webservice which retrives data from my DB , I am able to test the service through SOAP UI , but now I am trying to add few functionalites for the service and I want to add some Junits for the service , Please find my Endpoint and Junit details below.
My End Point Class
#Endpoint
public class CountryEndPoint {
private static final String NAMESPACE_URI = "http://tutorialspoint/schemas";
#Autowired
CountryRepository countryRepository;
#PayloadRoot(namespace = NAMESPACE_URI, localPart = "getCountryRequest")
#ResponsePayload
public GetCountryResponse getCountry(#RequestPayload GetCountryRequest request) throws JDOMException {
Country country = countryRepository.findCountry(request.getName());
GetCountryResponse response = new GetCountryResponse();
response.setCountry(country);
return response;
}
}
Spring-context.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:sws="http://www.springframework.org/schema/web-services"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/web-services
http://www.springframework.org/schema/web-services/web-services-2.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan
base-package="com.tutorialspoint" />
<sws:annotation-driven />
<bean id="schema"
class="org.springframework.core.io.ClassPathResource">
<constructor-arg index="0" value="*.xsd" />
</bean>
</beans>
Junit-Test calss
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(locations = "/spring-context.xml")
public class CustomerEndPointTest {
#Autowired
private ApplicationContext applicationContext;
#Autowired
private ResourceLoader resourceLoader;
private MockWebServiceClient mockClient;
private Resource schema = new ClassPathResource("countries.xsd");
#Before
public void createClient() {
mockClient = MockWebServiceClient.createClient(applicationContext);
GenericApplicationContext ctx = (GenericApplicationContext) applicationContext;
final XmlBeanDefinitionReader definitionReader = new XmlBeanDefinitionReader(ctx);
definitionReader.setValidationMode(XmlBeanDefinitionReader.VALIDATION_NONE);
definitionReader.setNamespaceAware(true);
}
#Test
public void testCountryEndpoint() throws Exception {
Resource request = resourceLoader.getResource("request.xml");
Resource response = resourceLoader.getResource("response.xml");
mockClient.sendRequest(withPayload(request)).
andExpect(payload(response)).
andExpect(validPayload(schema));
}
}
I am able to run the test case with out any issue but my problem is I am not able to mock my service class (CountryRepository) mock the the code below.
Country country = countryRepository.findCountry(request.getName());
Does any one have any suggessions on this?

Answer 1

From your test case, I suppose your are trying to mock the CrudRepository object from inside a webservice call: That would be called integration testing. You need to make a choice for unit testing:
Test the request, and assert its response http status code (for example),
Or test the getCountry method inside your CountryEndPoint class. Doing both options at the same time would be considered an integration test.
I will try to answer considering the unit test case, using option 2. I think it will give you better insights for the future.
You are injecting the dependency of the CountryRepository on your CountryEndPoint class. You need to do the same on your testing class. For example, a basic setup would be:
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(locations = "/spring-context.xml")
public class CustomerEndPointTest {
#InjectMocks
private CountryEndPoint countryEndPoint;
#Mock
private CountryRepository countryRepository;
#Test
public void testCountryEndpoint() throws Exception {
Mockito.when(countryRepository //...
countryEndPoint.getCountry(request //build a request object and pass it here.
//assertions...
}
}
Then, whenever a method from CountryRepository is invoked, it will be invoked from the mock instead. This is only possibly because of the injection of the mock via annotations.
If you actually send a request, using a HTTP client (like you intended), you cannot mock the methods being invoked inside your controller class, because you are not manipulating and assigning the instances yourself, and thus are not able to determine what is a mock, and what is not.