/*
* Copyright (C) 2011 Benoit GUEROUT <bguerout at gmail dot com> and Yves AMSELLEM <amsellem dot yves at gmail dot com>
*
* 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.jongo;
import com.mongodb.DBCursor;
import org.bson.types.ObjectId;
import org.jongo.model.Friend;
import org.jongo.util.JongoTestCase;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.util.Iterator;
import static org.assertj.core.api.Assertions.assertThat;
public class FindWithModifierTest extends JongoTestCase {
private MongoCollection collection;
@Before
public void setUp() throws Exception {
collection = createEmptyCollection("friends");
}
@After
public void tearDown() throws Exception {
dropCollection("friends");
}
@Test
public void canFindWithHint() throws Exception {
/* given */
Friend noName = new Friend(new ObjectId(), null);
collection.save(noName);
collection.ensureIndex("{name: 1}", "{sparse: true}");
/* when */
// force to use _id index instead of name index which is sparsed
Iterator<Friend> friends = collection.find().hint("{$natural: 1}").sort("{name: 1}").as(Friend.class);
/* then */
assertThat(friends.hasNext()).isTrue();
}
@Test
public void canUseQueryModifier() throws Exception {
/* given */
collection.save(new Friend(new ObjectId(), "John"));
collection.save(new Friend(new ObjectId(), "Robert"));
/* when */
Iterator<Friend> friends = collection.find()
.with(new QueryModifier() {
public void modify(DBCursor cursor) {
cursor.addSpecial("$maxScan", 1);
}
})
.as(Friend.class);
/* then */
assertThat(friends.hasNext()).isTrue();
friends.next();
assertThat(friends.hasNext()).isFalse();
}
}