/*
* 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.cassandra.utils;
import java.io.IOException;
import org.junit.Before;
import org.junit.Test;
public class BloomFilterTest
{
public BloomFilter bf;
public BloomFilterTest()
{
bf = BloomFilter.getFilter(FilterTest.ELEMENTS, FilterTest.MAX_FAILURE_RATE);
}
@Before
public void clear()
{
bf.clear();
}
@Test(expected=UnsupportedOperationException.class)
public void testBloomLimits1()
{
int maxBuckets = BloomCalculations.probs.length - 1;
int maxK = BloomCalculations.probs[maxBuckets].length - 1;
// possible
BloomCalculations.computeBloomSpec(maxBuckets, BloomCalculations.probs[maxBuckets][maxK]);
// impossible, throws
BloomCalculations.computeBloomSpec(maxBuckets, BloomCalculations.probs[maxBuckets][maxK] / 2);
}
@Test
public void testOne()
{
bf.add("a");
assert bf.isPresent("a");
assert !bf.isPresent("b");
}
@Test
public void testFalsePositivesInt()
{
FilterTest.testFalsePositives(bf, FilterTest.intKeys(), FilterTest.randomKeys2());
}
@Test
public void testFalsePositivesRandom()
{
FilterTest.testFalsePositives(bf, FilterTest.randomKeys(), FilterTest.randomKeys2());
}
@Test
public void testWords()
{
if (KeyGenerator.WordGenerator.WORDS == 0)
{
return;
}
BloomFilter bf2 = BloomFilter.getFilter(KeyGenerator.WordGenerator.WORDS / 2, FilterTest.MAX_FAILURE_RATE);
int skipEven = KeyGenerator.WordGenerator.WORDS % 2 == 0 ? 0 : 2;
FilterTest.testFalsePositives(bf2,
new KeyGenerator.WordGenerator(skipEven, 2),
new KeyGenerator.WordGenerator(1, 2));
}
@Test
public void testSerialize() throws IOException
{
FilterTest.testSerialize(bf);
}
/* TODO move these into a nightly suite (they take 5-10 minutes each)
@Test
// run with -mx1G
public void testBigInt() {
int size = 100 * 1000 * 1000;
bf = new BloomFilter(size, FilterTest.spec.bucketsPerElement);
FilterTest.testFalsePositives(bf,
new KeyGenerator.IntGenerator(size),
new KeyGenerator.IntGenerator(size, size * 2));
}
@Test
public void testBigRandom() {
int size = 100 * 1000 * 1000;
bf = new BloomFilter(size, FilterTest.spec.bucketsPerElement);
FilterTest.testFalsePositives(bf,
new KeyGenerator.RandomStringGenerator(new Random().nextInt(), size),
new KeyGenerator.RandomStringGenerator(new Random().nextInt(), size));
}
@Test
public void timeit() {
int size = 300 * FilterTest.ELEMENTS;
bf = new BloomFilter(size, FilterTest.spec.bucketsPerElement);
for (int i = 0; i < 10; i++) {
FilterTest.testFalsePositives(bf,
new KeyGenerator.RandomStringGenerator(new Random().nextInt(), size),
new KeyGenerator.RandomStringGenerator(new Random().nextInt(), size));
bf.clear();
}
}
*/
}