/** * 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.db.compaction; import java.util.ArrayList; import java.util.List; import org.junit.Test; import org.apache.cassandra.utils.Pair; import static org.junit.Assert.assertEquals; public class SizeTieredCompactionStrategyTest { @Test public void testGetBuckets() { List<Pair<String, Long>> pairs = new ArrayList<Pair<String, Long>>(); String[] strings = { "a", "bbbb", "cccccccc", "cccccccc", "bbbb", "a" }; for (String st : strings) { Pair<String, Long> pair = Pair.create(st, new Long(st.length())); pairs.add(pair); } List<List<String>> buckets = SizeTieredCompactionStrategy.getBuckets(pairs, 1.5, 0.5, 2); assertEquals(3, buckets.size()); for (List<String> bucket : buckets) { assertEquals(2, bucket.size()); assertEquals(bucket.get(0).length(), bucket.get(1).length()); assertEquals(bucket.get(0).charAt(0), bucket.get(1).charAt(0)); } pairs.clear(); buckets.clear(); String[] strings2 = { "aaa", "bbbbbbbb", "aaa", "bbbbbbbb", "bbbbbbbb", "aaa" }; for (String st : strings2) { Pair<String, Long> pair = Pair.create(st, new Long(st.length())); pairs.add(pair); } buckets = SizeTieredCompactionStrategy.getBuckets(pairs, 1.5, 0.5, 2); assertEquals(2, buckets.size()); for (List<String> bucket : buckets) { assertEquals(3, bucket.size()); assertEquals(bucket.get(0).charAt(0), bucket.get(1).charAt(0)); assertEquals(bucket.get(1).charAt(0), bucket.get(2).charAt(0)); } // Test the "min" functionality pairs.clear(); buckets.clear(); String[] strings3 = { "aaa", "bbbbbbbb", "aaa", "bbbbbbbb", "bbbbbbbb", "aaa" }; for (String st : strings3) { Pair<String, Long> pair = Pair.create(st, new Long(st.length())); pairs.add(pair); } buckets = SizeTieredCompactionStrategy.getBuckets(pairs, 1.5, 0.5, 10); assertEquals(1, buckets.size()); } }