/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.activemq.broker.region.group;

import junit.framework.TestCase;
import org.apache.activemq.command.ConnectionId;
import org.apache.activemq.command.ConsumerId;
import org.apache.activemq.command.SessionId;
import org.junit.experimental.categories.Category;
import org.apache.activemq.test.annotations.ParallelTest;

/**
 * 
 * 
 */
@Category(ParallelTest.class)
public class MessageGroupMapTest extends TestCase {

    protected MessageGroupMap map;
    private ConsumerId consumer1;
    private ConsumerId consumer2;
    private ConsumerId consumer3;
    private long idCounter;

    public void testSingleConsumerForManyBucks() throws Exception {
        assertGet("1", null);

        map.put("1", consumer1);
        assertGet("1", consumer1);
        map.put("2", consumer1);
        assertGet("2", consumer1);
        map.put("3", consumer1);
        assertGet("3", consumer1);

        MessageGroupSet set = map.removeConsumer(consumer1);
        assertContains(set, "1");
        assertContains(set, "2");
        assertContains(set, "3");
        assertGet("1", null);
        assertGet("2", null);
        assertGet("3", null);
    }

    public void testManyConsumers() throws Exception {
        assertGet("1", null);

        map.put("1", consumer1);
        assertGet("1", consumer1);
        map.put("2", consumer2);
        assertGet("2", consumer2);
        map.put("3", consumer3);
        assertGet("3", consumer3);

        MessageGroupSet set = map.removeConsumer(consumer1);
        assertContains(set, "1");

        assertGet("1", null);
        map.put("1", consumer2);
        assertGet("1", consumer2);

        set = map.removeConsumer(consumer2);
        assertContains(set, "1");
        assertContains(set, "2");
    }

    protected void setUp() throws Exception {
        super.setUp();
        map = createMessageGroupMap();
        consumer1 = createConsumerId();
        consumer2 = createConsumerId();
        consumer3 = createConsumerId();
    }

    protected MessageGroupMap createMessageGroupMap() {
        return new SimpleMessageGroupMap();
    }

    protected ConsumerId createConsumerId() {
        ConnectionId connectionId = new ConnectionId("" + ++idCounter);
        SessionId sessionId = new SessionId(connectionId, ++idCounter);
        ConsumerId answer = new ConsumerId(sessionId, ++idCounter);
        return answer;
    }

    protected void assertGet(String groupdId, ConsumerId expected) {
        ConsumerId actual = map.get(groupdId);
        assertEquals("Entry for groupId: " + groupdId, expected, actual);
    }

    protected void assertContains(MessageGroupSet set, String groupID) {
        assertTrue("MessageGroup set: " + set + " does not contain groupID: " + groupID, set.contains(groupID));
    }
}
