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SharedCallCounterMapTest.java
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SharedCallCounterMapTest.java
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/*
* Copyright 2019 The gRPC 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 io.grpc.xds;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.testing.GcFinalization;
import com.google.common.testing.GcFinalization.FinalizationPredicate;
import io.grpc.xds.SharedCallCounterMap.CounterReference;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link SharedCallCounterMap}.
*/
@RunWith(JUnit4.class)
public class SharedCallCounterMapTest {
private static final String CLUSTER = "cluster-foo.googleapis.com";
private static final String EDS_SERVICE_NAME = null;
private final Map<String, Map<String, CounterReference>> counters = new HashMap<>();
private final SharedCallCounterMap map = new SharedCallCounterMap(counters);
@Test
public void sharedCounterInstance() {
AtomicLong counter1 = map.getOrCreate(CLUSTER, EDS_SERVICE_NAME);
AtomicLong counter2 = map.getOrCreate(CLUSTER, EDS_SERVICE_NAME);
assertThat(counter2).isSameInstanceAs(counter1);
}
@Test
public void autoCleanUp() {
@SuppressWarnings("UnusedVariable")
AtomicLong counter = map.getOrCreate(CLUSTER, EDS_SERVICE_NAME);
final CounterReference ref = counters.get(CLUSTER).get(EDS_SERVICE_NAME);
counter = null;
GcFinalization.awaitDone(new FinalizationPredicate() {
@Override
public boolean isDone() {
return ref.isEnqueued();
}
});
map.cleanQueue();
assertThat(counters).isEmpty();
}
@Test
public void gcAndRecreate() {
@SuppressWarnings("UnusedVariable") // assign to null for GC only
AtomicLong counter = map.getOrCreate(CLUSTER, EDS_SERVICE_NAME);
final CounterReference ref = counters.get(CLUSTER).get(EDS_SERVICE_NAME);
assertThat(counter.get()).isEqualTo(0);
counter = null;
GcFinalization.awaitDone(new FinalizationPredicate() {
@Override
public boolean isDone() {
return ref.isEnqueued();
}
});
map.getOrCreate(CLUSTER, EDS_SERVICE_NAME);
assertThat(counters.get(CLUSTER)).isNotNull();
assertThat(counters.get(CLUSTER).get(EDS_SERVICE_NAME)).isNotNull();
}
}