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CarTest.java
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CarTest.java
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/**
* JBoss, Home of Professional Open Source
* Copyright 2009, Red Hat, Inc. and/or its affiliates, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example;
import java.util.Set;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
/**
* <p>
* A module test that shows how to use the Bean Validation (BV) API to validate
* the constraint annotations at the exemplary {@link Car} model class.
* </p>
* <p>
* The interface {@link Validator} is the main entry point the BV API. The
* test makes use of the <code>validate()</code> method of that interface, which
* returns a set of <code>ConstraintViolation</code>s, that describe the
* problems occurred during validation.
* </p>
* <p>
* In case the object in question could be validated successfully this set will
* be empty.
* </p>
*
* @author Gunnar Morling
* @author Hardy Ferentschik
*/
public class CarTest {
/**
* The validator to be used for object validation. Will be retrieved once
* for all test methods.
*/
private static Validator validator;
/**
* Retrieves the validator instance.
*/
@BeforeClass
public static void setUp() {
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
validator = factory.getValidator();
}
/**
* One constraint violation due to the manufacturer field being null
* expected.
*/
@Test
public void manufacturerIsNull() {
Car car = new Car( null, "DD-AB-123", 4 );
Set<ConstraintViolation<Car>> constraintViolations = validator.validate( car );
assertEquals( 1, constraintViolations.size() );
assertEquals( "may not be null", constraintViolations.iterator().next().getMessage() );
}
/**
* One constraint violation due to the licensePlate field being too short
* expected.
*/
@Test
public void licensePlateTooShort() {
Car car = new Car( "Morris", "D", 4 );
Set<ConstraintViolation<Car>> constraintViolations = validator.validate( car );
assertEquals( 1, constraintViolations.size() );
assertEquals( "size must be between 2 and 14", constraintViolations.iterator().next().getMessage() );
}
/**
* One constraint violation due to the seatCount field being too low
* expected.
*/
@Test
public void seatCountTooLow() {
Car car = new Car( "Morris", "DD-AB-123", 1 );
Set<ConstraintViolation<Car>> constraintViolations = validator.validate( car );
assertEquals( 1, constraintViolations.size() );
assertEquals( "must be greater than or equal to 2", constraintViolations.iterator().next().getMessage() );
}
/**
* No constraint violation expected, as all fields of the validated Car
* instance have proper values.
*/
@Test
public void carIsValid() {
Car car = new Car( "Morris", "DD-AB-123", 2 );
Set<ConstraintViolation<Car>> constraintViolations = validator.validate( car );
assertEquals( 0, constraintViolations.size() );
}
/**
* Validating the default group leads to validation on the default group sequence of {@code RentalCar}.
*/
@Test
public void carIsRented() {
RentalCar rentalCar = new RentalCar( "Morris", "DD-AB-123", 2 );
rentalCar.setPassedVehicleInspection( true );
rentalCar.setRented( true );
Set<ConstraintViolation<RentalCar>> constraintViolations = validator.validate( rentalCar );
assertEquals( 1, constraintViolations.size() );
assertEquals(
"Wrong message",
"The car is currently rented out",
constraintViolations.iterator().next().getMessage()
);
rentalCar.setRented( false );
constraintViolations = validator.validate( rentalCar );
assertEquals( 0, constraintViolations.size() );
}
}