/*
* Copyright (c) 2009-2010 Lockheed Martin Corporation
*
* 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 org.eurekastreams.commons.hibernate;
import static org.junit.Assert.assertEquals;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import javax.persistence.EntityManager;
import org.hibernate.Query;
import org.hibernate.classic.Session;
import org.jmock.Expectations;
import org.jmock.integration.junit4.JUnit4Mockery;
import org.jmock.lib.legacy.ClassImposteriser;
import org.junit.Test;
/**
* Test fixture for QueryOptimizer class.
*/
public class QueryOptimizerTest
{
/**
* Context for mocking.
*/
private final JUnit4Mockery context = new JUnit4Mockery()
{
{
setImposteriser(ClassImposteriser.INSTANCE);
}
};
/**
* The result count.
*/
private static final long RESULT_COUNT = 323L;
/**
* Test determining a collection's size without first setting the
* EntityManager.
*/
@Test(expected = NullPointerException.class)
public void testDetermineCollectionSizeThrowsExceptionWithoutEntityManager()
{
QueryOptimizer optimizer = new QueryOptimizer();
optimizer.determineCollectionSize(new ArrayList<String>());
}
/**
* Test setting the entity manager.
*/
@Test
public void testEntityManagerSetter()
{
EntityManager entityManager = context.mock(EntityManager.class);
QueryOptimizer optimizer = new QueryOptimizer();
optimizer.setEntityManager(entityManager);
}
/**
* Test determineCollectionSize.
*/
@Test
public void testDetermineCollectionSize()
{
final EntityManager entityManager = context.mock(EntityManager.class);
final Session hibernateSession = context.mock(Session.class);
final Query hibernateQuery = context.mock(Query.class);
final Collection<Object> collectionToSize = new ArrayList<Object>();
final List<Long> resultList = new ArrayList<Long>();
resultList.add(new Long(RESULT_COUNT));
QueryOptimizer optimizer = new QueryOptimizer();
optimizer.setEntityManager(entityManager);
// setup the expectations.
context.checking(new Expectations()
{
{
one(entityManager).getDelegate();
will(returnValue(hibernateSession));
one(hibernateSession).createFilter(collectionToSize, "select count(*)");
will(returnValue(hibernateQuery));
one(hibernateQuery).list();
will(returnValue(resultList));
}
});
// call the SUT
assertEquals(RESULT_COUNT, optimizer.determineCollectionSize(collectionToSize));
// all expectations met?
context.assertIsSatisfied();
}
}