package org.apache.cassandra.utils; /* * * 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. * */ import static org.junit.Assert.*; import java.util.Iterator; import org.junit.Test; public class BoundedStatsDequeTest { @Test public void test() { int size = 4; BoundedStatsDeque bsd = new BoundedStatsDeque(size); //check the values for an empty result assertEquals(0, bsd.size()); assertEquals(0, bsd.sum(), 0.001d); assertEquals(0, bsd.mean(), 0.001d); bsd.add(1d); //this one falls out, over limit bsd.add(2d); bsd.add(3d); bsd.add(4d); bsd.add(5d); //verify that everything is in there Iterator<Double> iter = bsd.iterator(); assertTrue(iter.hasNext()); assertEquals(2d, iter.next(), 0); assertTrue(iter.hasNext()); assertEquals(3d, iter.next(), 0); assertTrue(iter.hasNext()); assertEquals(4d, iter.next(), 0); assertTrue(iter.hasNext()); assertEquals(5d, iter.next(), 0); assertFalse(iter.hasNext()); //check results assertEquals(size, bsd.size()); assertEquals(14, bsd.sum(), 0.001d); assertEquals(3.5, bsd.mean(), 0.001d); //check that it clears properly bsd.clear(); assertFalse(bsd.iterator().hasNext()); } }