/** * Copyright (c) 2013 Oculus Info Inc. * http://www.oculusinfo.com/ * * Released under the MIT License. * * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in * the Software without restriction, including without limitation the rights to * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is furnished to do * so, subject to the following conditions: * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package spimedb.util.math.statistics; import junit.framework.Assert; import org.junit.Test; public class TestStats { private static final double EPSILON = 1E-12; @Test public void testMean () { StatTracker s = new StatTracker(); s.addStat(0.0); s.addStat(1.0); s.addStat(2.0); Assert.assertEquals(1.0, s.mean(), EPSILON); s.addStat(3.0); Assert.assertEquals(1.5, s.mean(), EPSILON); } @Test public void testVariance () { StatTracker s = new StatTracker(); s.addStat(0.0); s.addStat(1.0); s.addStat(2.0); Assert.assertEquals(2.0/3.0, s.variance(), EPSILON); s.addStat(3.0); Assert.assertEquals(5.0/4.0, s.variance(), EPSILON); } @Test public void testReset () { StatTracker s = new StatTracker(); s.addStat(0.0); s.addStat(1.0); s.addStat(2.0); s.addStat(3.0); Assert.assertEquals(1.5, s.mean(), EPSILON); s.reset(); s.addStat(0.0); s.addStat(1.0); Assert.assertEquals(0.5, s.mean(), EPSILON); } }