package ejava.jpa.example.validation;
   
   import static org.junit.Assert.*;
   
   import java.util.Set;
   
   import javax.validation.ConstraintViolation;
   import javax.validation.Validation;
   import javax.validation.Validator;
  import javax.validation.ValidatorFactory;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.junit.Test;
  
  /**
   * This test case demonstrates the use of deployment descriptors to define
   * validation for beans.
   */
  public class XMLTest {
  	private static final Logger logger = LoggerFactory.getLogger(XMLTest.class);
  	
  	ValidatorFactory vf = Validation.buildDefaultValidatorFactory();
  	Validator val = vf.getValidator();
  
  	/**
  	 * This test verifies the XML-based definitions will be used to 
  	 * detect a validation error with the bean.
  	 */
  	@Test
  	public void testValidationDescriptorBad() {
  		logger.info("*** testValidationDescriptorBad");
  		
  		Book b = new Book();
  		Set<ConstraintViolation<Book>> violations = val.validate(b);
  		for (ConstraintViolation<Book> v : violations) {
              logger.debug("{}:{} {}", v.getPropertyPath(), v.getInvalidValue(), v.getMessage());
  		}
  		assertEquals("unexpected number of violations", 2, violations.size());
  	}
  
  	/**
  	 * This test verifies the XML-based definitions will successfully validate
  	 * and pass a valid bean. 
  	 */
  	@Test
  	public void testValidationDescriptorGood() {
  		logger.info("*** testValidationDescriptorGood");
  		
  		Book b = new Book().setTitle("Validation Rocks!").setPages(30);
  		Set<ConstraintViolation<Book>> violations = val.validate(b);
  		assertEquals("unexpected number of violations", 0, violations.size());
  	}
  }