/
HistogramFieldBeanTest.java
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/
HistogramFieldBeanTest.java
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/**
* Copyright (c) 2013, 2022 Contributors to the Eclipse Foundation
* Copyright © 2013 Antonin Stefanutti (antonin.stefanutti@gmail.com)
*
* 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.eclipse.microprofile.metrics.tck.metrics;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.notNullValue;
import static org.junit.Assert.assertThat;
import org.eclipse.microprofile.metrics.Histogram;
import org.eclipse.microprofile.metrics.MetricID;
import org.eclipse.microprofile.metrics.MetricRegistry;
import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.arquillian.junit.InSequence;
import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.ShrinkWrap;
import org.jboss.shrinkwrap.api.spec.WebArchive;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import jakarta.inject.Inject;
@RunWith(Arquillian.class)
public class HistogramFieldBeanTest {
private final static String HISTOGRAM_NAME = MetricRegistry.name(HistogramFieldBean.class, "histogramName");
private static MetricID histogramMID;
@Deployment
static Archive<?> createTestArchive() {
return ShrinkWrap.create(WebArchive.class)
// Test bean
.addClass(HistogramFieldBean.class)
// Bean archive deployment descriptor
.addAsWebInfResource("META-INF/beans.xml", "beans.xml");
}
@Inject
private MetricRegistry registry;
@Inject
private HistogramFieldBean bean;
@Before
public void instantiateTest() {
/*
* The MetricID relies on the MicroProfile Config API. Running a managed arquillian container will result with
* the MetricID being created in a client process that does not contain the MPConfig impl.
*
* This will cause client instantiated MetricIDs to throw an exception. (i.e the global MetricIDs)
*/
histogramMID = new MetricID(HISTOGRAM_NAME);
}
@Test
@InSequence(1)
public void histogramFieldRegistered() {
assertThat("Histogram is not registered correctly", registry.getHistogram(histogramMID), notNullValue());
}
@Test
@InSequence(2)
public void updateHistogramField() {
Histogram histogram = registry.getHistogram(histogramMID);
assertThat("Histogram is not registered correctly", histogram, notNullValue());
// Call the update method and assert the histogram is up-to-date
long value = Math.round(Math.random() * Long.MAX_VALUE);
bean.update(value);
assertThat("Histogram count is incorrect", histogram.getCount(), is(equalTo(1L)));
assertThat("Histogram sum is incorrect", histogram.getSum(), is(equalTo(value)));
assertThat("Histogram size is incorrect", histogram.getSnapshot().size(), is(equalTo(1L)));
assertThat("Histogram max value is incorrect", histogram.getSnapshot().getMax(), is(equalTo((double) value)));
}
}