Java Validator Needs to be tested by a JUnit Testcase

See more:

Java

Please help! I having the following simple validator class:

 package com.govpaynet.rest.validator.marionco;
 
import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.validation.Errors;
 
import com.govpaynet.rest.integration.GenericResponseCode;
 import com.govpaynet.rest.model.CheckUTTRequest;
 import com.govpaynet.validator.model.Validator;
 
public class CheckUTTValidator implements Validator<checkuttrequest> {
 private final Logger logger = LoggerFactory
 .getLogger(CheckUTTValidator.class);
 
public final void validate(final Object obj, final Errors errors) {
 final CheckUTTRequest input = (CheckUTTRequest)obj;
 if (input.getInputValue().isEmpty()){
 logger.debug("The user input data.");
 errors.rejectValue(GenericResponseCode.GENERIC_200.value(),"Invalid request data.");
 
}
 return;
 }
 
@Override
 public final Boolean supports(final Classreturn inputType != null && CheckUTTRequest.class.isAssignableFrom(inputType); 
}
 
}

I need to unit test it using junit. I have the following class:

 package com.govpaynet.rest.validator.marionco;
 
import static org.junit.Assert.*;
 
import org.easymock.Capture;
 import org.junit.Before;
 import org.junit.Test;
 import org.springframework.validation.Errors;
 
import com.govpaynet.rest.integration.GenericResponseCode;
 import com.govpaynet.rest.model.CheckUTTRequest;
 
public class CheckUTTValidatorTest {
 private CheckUTTValidator validator;
 private CheckUTTRequest request;
 private Errors errorsMock;
 
@Before
 public void setup(){
 //request=new CheckUTTRequest();
 request.setUserInputValue(null, null);
 
request=creakeMock(CheckUTTValidator.class);
 errorsMock= createMock(Errors.class);
 validator=new CheckUTTValidator();
 
}
 
@Test
 public void supportsNot() {
 assertFalse(validator.supports(null));
 }
 
@Test
 public void supports() {
 try{
 assertTrue(validator.supports(CheckUTTRequest.class));
 }
 catch(NullPointerException e){
 
}
 }
 
@Test
 public void validateEmptyCheckUTTUserInput() {
 GenericResponseCode expectedErroCode = GenericResponseCode.GENERIC_200;
 final Capture<string> errorCode = new Capture<string>();
 
try {
 request.setUserInputValue(null, null);
 validator.validate(request, errorsMock);
 assertEquals(expectedErroCode, errorCode.getValue());
 } catch (NullPointerException e) {
 
}
 }
 
}

I only want to test the validate method to make sure that if the arraylist is empty the appropriate errors will be returned. I was attempting to use easyMock, but things have not went successful. Please help what sould the appropriate junit testcase look like to test this simple validator.