CountedClassBeanTest.java

/**
 * 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 io.astefanutti.metrics.cdi.se;

import com.codahale.metrics.Counter;
import com.codahale.metrics.MetricRegistry;
import io.astefanutti.metrics.cdi.MetricsExtension;
import io.astefanutti.metrics.cdi.se.util.MetricsUtil;
import org.hamcrest.Matchers;
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.asset.EmptyAsset;
import org.jboss.shrinkwrap.api.spec.JavaArchive;
import org.junit.Test;
import org.junit.runner.RunWith;

import javax.inject.Inject;
import java.util.Set;

import static org.hamcrest.Matchers.*;
import static org.junit.Assert.assertThat;

@RunWith(Arquillian.class)
public class CountedClassBeanTest {

    private static final String CONSTRUCTOR_NAME = "CountedClassBean";

    private static final String[] METHOD_NAMES = {"countedMethodOne", "countedMethodTwo", "countedMethodProtected", "countedMethodPackagedPrivate"};

    private static final Set<String> COUNTER_NAMES = MetricsUtil.absoluteMetricNames(CountedClassBean.class, "countedClass", METHOD_NAMES, CONSTRUCTOR_NAME);

    @Deployment
    static Archive<?> createTestArchive() {
        return ShrinkWrap.create(JavaArchive.class)
            // Test bean
            .addClass(CountedClassBean.class)
            // Metrics CDI extension
            .addPackage(MetricsExtension.class.getPackage())
            // Bean archive deployment descriptor
            .addAsManifestResource(EmptyAsset.INSTANCE, "beans.xml");
    }

    @Inject
    private MetricRegistry registry;

    @Inject
    private CountedClassBean bean;

    @Test
    @InSequence(1)
    public void countedMethodsNotCalledYet() {
        assertThat("Counters are not registered correctly", registry.getCounters().keySet(), is(equalTo(COUNTER_NAMES)));

        // Make sure that the counters haven't been incremented
        assertThat("Counter counts are incorrect", registry.getCounters().values(), everyItem(Matchers.<Counter>hasProperty("count", equalTo(0L))));
    }

    @Test
    @InSequence(2)
    public void callCountedMethodsOnce() {
        assertThat("Counters are not registered correctly", registry.getCounters().keySet(), is(equalTo(COUNTER_NAMES)));

        // Call the counted methods and assert they're back to zero
        bean.countedMethodOne();
        bean.countedMethodTwo();
        // Let's call the non-public methods as well
        bean.countedMethodProtected();
        bean.countedMethodPackagedPrivate();

        // Make sure that the counters are back to zero
        assertThat("Counter counts are incorrect", registry.getCounters().values(), everyItem(Matchers.<Counter>hasProperty("count", equalTo(0L))));
    }
}