core/src/test/java/org/elasticsearch/common/ReleasablesTests.java


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/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.elasticsearch.common;

import org.elasticsearch.common.lease.Releasable;
import org.elasticsearch.common.lease.Releasables;
import org.elasticsearch.test.ESTestCase;

import java.util.concurrent.atomic.AtomicInteger;

public class ReleasablesTests extends ESTestCase {

    public void testReleaseOnce() {
        AtomicInteger count = new AtomicInteger(0);
        Releasable releasable = Releasables.releaseOnce(count::incrementAndGet, count::incrementAndGet);
        assertEquals(0, count.get());
        releasable.close();
        assertEquals(2, count.get());
        releasable.close();
        assertEquals(2, count.get());
    }
}