/*
* Copyright 2011 Thomas Bocek
*
* 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 net.tomp2p.p2p;
import java.net.UnknownHostException;
import java.util.Random;
import net.tomp2p.Utils2;
import net.tomp2p.peers.DefaultMaintenance;
import net.tomp2p.peers.DefaultPeerFilter;
import net.tomp2p.peers.Number160;
import net.tomp2p.peers.PeerAddress;
import net.tomp2p.peers.PeerMap;
import net.tomp2p.peers.PeerMapConfiguration;
import org.junit.Assert;
import org.junit.Test;
public class TestStatistics {
private static final Number160 ID = new Number160("0x1");
@Test
public void testCountPeers1() throws UnknownHostException {
Random rnd = new Random(42L);
for (int j = 1; j < 20; j++) {
int nr = 100000 * j;
PeerMapConfiguration conf = new PeerMapConfiguration(ID);
conf.bagSizeVerified(20).bagSizeOverflow(20);
conf.offlineCount(1000).offlineTimeout(60);
conf.addPeerFilter(new DefaultPeerFilter()).maintenance(new DefaultMaintenance(0, new int[] {}));
PeerMap peerMap = new PeerMap(conf);
Statistics statistics = new Statistics(peerMap);
for (int i = 0; i < nr; i++) {
PeerAddress pa = Utils2.createAddress(new Number160(rnd));
peerMap.peerFound(pa, null, null);
}
double diff = nr / statistics.estimatedNumberOfNodes();
System.err.println("diff: " + diff);
System.err.println("estimated: " + statistics.estimatedNumberOfNodes() + " actual: " + (nr-1));
Assert.assertTrue(diff < 1.5 && diff > 0.5);
}
}
}