TestDBCursor.java

/*
 * Copyright 2011 VZ Netzwerke Ltd
 * Copyright 2014 devbliss GmbH
 * 
 * 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.mongojack;

import static org.hamcrest.Matchers.contains;
import static org.hamcrest.Matchers.hasSize;
import static org.hamcrest.Matchers.not;
import static org.hamcrest.core.IsEqual.equalTo;
import static org.junit.Assert.assertThat;

import java.util.List;

import org.junit.Before;
import org.junit.Test;
import org.mongojack.mock.MockObject;

import com.mongodb.BasicDBObject;

/**
 * Test the Json DB Cursor
 */
public class TestDBCursor extends MongoDBTestBase {
    private JacksonDBCollection<MockObject, String> coll;

    @Before
    public void setup() throws Exception {
        coll = getCollection(MockObject.class, String.class);
    }

    @Test
    public void testIterator() {
        MockObject o1 = new MockObject("id1", "blah1", 10);
        MockObject o2 = new MockObject("id2", "blah2", 20);
        MockObject o3 = new MockObject("id3", "blah3", 30);
        coll.insert(o1, o2, o3);
        DBCursor<MockObject> cursor = coll.find().sort(
                new BasicDBObject("integer", 1));
        assertThat(cursor.hasNext(), equalTo(true));
        assertThat(cursor.next(), equalTo(o1));
        assertThat(cursor.curr(), equalTo(o1));
        assertThat(cursor.hasNext(), equalTo(true));
        assertThat(cursor.next(), equalTo(o2));
        assertThat(cursor.curr(), equalTo(o2));
        assertThat(cursor.hasNext(), equalTo(true));
        assertThat(cursor.next(), equalTo(o3));
        assertThat(cursor.curr(), equalTo(o3));
        assertThat(cursor.hasNext(), equalTo(false));
    }

    @Test
    public void testArray() {
        MockObject o1 = new MockObject("id1", "blah1", 10);
        MockObject o2 = new MockObject("id2", "blah2", 20);
        MockObject o3 = new MockObject("id3", "blah3", 30);
        coll.insert(o1, o2, o3);
        List<MockObject> results = coll.find()
                .sort(new BasicDBObject("integer", 1)).toArray();
        assertThat(results, contains(o1, o2, o3));
        assertThat(results, hasSize(3));
    }

    @Test
    public void testPutGroup() {
        DBCursor<MockObject> cursor = coll.find(DBQuery.and(DBQuery.exists("string")));
        String queryBefore = cursor.getQuery().toString();
        assertThat(cursor.and(DBQuery.lessThan("integer", 20)).getQuery().toString(),
                not(equalTo(queryBefore)));
    }
}