/*
* Copyright 2011-2013 the original author or authors.
*
* 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 org.springframework.xd.analytics.metrics;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
import org.springframework.xd.analytics.metrics.core.RichGauge;
import org.springframework.xd.analytics.metrics.core.RichGaugeRepository;
/**
* @author Luke Taylor
*/
public abstract class AbstractRichGaugeRepositoryTests {
protected abstract RichGaugeRepository createService();
@Test
public void getOrCreateReturnsCorrectInstance() throws Exception {
RichGaugeRepository gs = createService();
gs.setValue("test", 9.99);
gs.setValue("test", 0.01);
RichGauge g = gs.findOne("test");
assertEquals("test", g.getName());
assertEquals(0.01, g.getValue(), 1E-6);
assertEquals(5.0, g.getAverage(), 1E-6);
assertEquals(9.99, g.getMax(), 1E-6);
assertEquals(0.01, g.getMin(), 1E-6);
}
@Test
public void resetExistingGaugeCausesReset() throws Exception {
RichGaugeRepository gs = createService();
gs.setValue("test", 9.99);
gs.reset("test");
RichGauge g = gs.findOne("test");
assertEquals(0.0, g.getValue(), 1E-6);
}
@Test
public void testExponentialMovingAverage() throws Exception {
RichGaugeRepository gs = createService();
gs.setAlpha("test", 0.1);
gs.setValue("test", 71.0);
RichGauge g = gs.findOne("test");
assertEquals(71.0, g.getAverage(), 1E-6);
gs.setValue("test", 70.0);
g = gs.findOne("test");
assertEquals(71.0, g.getAverage(), 1E-6);
gs.setValue("test", 69.0);
g = gs.findOne("test");
assertEquals(70.9, g.getAverage(), 1E-6);
gs.setValue("test", 68.0);
g = gs.findOne("test");
assertEquals(70.71, g.getAverage(), 1E-6);
}
}