Junit Test Case - junit

Question

I wanted to write junit for below method "createEmailTripEvent()", So i was trying to mock EmailTrip interface by using EasyMock but couldn't able to proceed.
Is it possible to use EasyMock for mocking interface or we need to go for Mockito only ?
If Mockito is the only option, then anybody can explain me how we can use ?
Please refer below class & Interface
private EmailTrip emailTrip;
public ModelAndView createEmailTripEvent (HttpServletRequest request,
HttpServletResponse response) throws Exception {
emailTrip.createEmailTripEvent(Code, emailRequest);
//Need to write junit for above method
}
public interface EmailTrip {
void createEmailTripEvent(String code, TripEmailRequest request)
throws Exception;
}
public class EmailTripImpl implements EmailTrip { }

Answer 1

You should include the following dependency to your maven pom (if not using maven, urgently consider doing so...). Otherwise include the EasyMock dependency to your class path.
<dependency>
<groupId>org.easymock</groupId>
<artifactId>easymock</artifactId>
<version>3.3.1</version>
<scope>test</scope>
</dependency>
After that you should be able to create your test class.
import static org.easymock.EasyMock.*;
import org.easymock.*;
import org.junit.Rule;
import org.junit.Test;
public class MyTinyTest extends EasyMockSupport {
#Rule
public EasyMockRule rule = new EasyMockRule(this);
#Mock
private EmailTrip emailTrip;
#TestSubject
private final ServletClass servlet = new ServletClass(emailTrip);
#Test
public void testCreateEmailTripEvent() {
// you should know how to create an email request instance!
EmailTripRequest emailRequest = createRequest();
// tell EasyMock what behavior is expected...
emailTrip.createEmailTripEvent("code", emailRequest);
// start testing...
replayAll();
// excute method to test...
ModelAndView result = servlet.createEmailTripEvent(servletRequest, servletResponse);
// verify if expected behavior occured.
verifyAll();
// check other assertions concerning the method result...
}
}