/*
* 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.
*/
package org.apache.beam.runners.core.metrics;
import static org.hamcrest.Matchers.containsInAnyOrder;
import static org.hamcrest.Matchers.not;
import static org.hamcrest.Matchers.nullValue;
import static org.hamcrest.Matchers.sameInstance;
import static org.junit.Assert.assertThat;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicLong;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link MetricsMap}.
*/
@RunWith(JUnit4.class)
public class MetricsMapTest {
public MetricsMap<String, AtomicLong> metricsMap =
new MetricsMap<>(new MetricsMap.Factory<String, AtomicLong>() {
@Override
public AtomicLong createInstance(String unusedKey) {
return new AtomicLong();
}
});
@Test
public void testCreateSeparateInstances() {
AtomicLong foo = metricsMap.get("foo");
AtomicLong bar = metricsMap.get("bar");
assertThat(foo, not(sameInstance(bar)));
}
@Test
public void testReuseInstances() {
AtomicLong foo1 = metricsMap.get("foo");
AtomicLong foo2 = metricsMap.get("foo");
assertThat(foo1, sameInstance(foo2));
}
@Test
public void testGet() {
assertThat(metricsMap.tryGet("foo"), nullValue(AtomicLong.class));
AtomicLong foo = metricsMap.get("foo");
assertThat(metricsMap.tryGet("foo"), sameInstance(foo));
}
@Test
public void testGetEntries() {
AtomicLong foo = metricsMap.get("foo");
AtomicLong bar = metricsMap.get("bar");
assertThat(metricsMap.entries(), containsInAnyOrder(
hasEntry("foo", foo),
hasEntry("bar", bar)));
}
private static Matcher<Map.Entry<String, AtomicLong>> hasEntry(
final String key, final AtomicLong value) {
return new TypeSafeMatcher<Entry<String, AtomicLong>>() {
@Override
public void describeTo(Description description) {
description
.appendText("Map.Entry{key=").appendValue(key)
.appendText(", value=").appendValue(value)
.appendText("}");
}
@Override
protected boolean matchesSafely(Entry<String, AtomicLong> item) {
return Objects.equals(key, item.getKey())
&& Objects.equals(value, item.getValue());
}
};
}
}