001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.zookeeper;
019
020import static org.junit.jupiter.api.Assertions.assertEquals;
021import static org.junit.jupiter.api.Assertions.assertNull;
022
023import java.util.concurrent.atomic.AtomicReference;
024import org.apache.hadoop.hbase.testclassification.SmallTests;
025import org.apache.hadoop.hbase.testclassification.ZKTests;
026import org.junit.jupiter.api.Tag;
027import org.junit.jupiter.api.Test;
028
029@Tag(ZKTests.TAG)
030@Tag(SmallTests.TAG)
031public class TestInstancePending {
032
033  @Test
034  public void test() throws Exception {
035    final InstancePending<String> pending = new InstancePending<>();
036    final AtomicReference<String> getResultRef = new AtomicReference<>();
037
038    new Thread() {
039      @Override
040      public void run() {
041        getResultRef.set(pending.get());
042      }
043    }.start();
044
045    Thread.sleep(100);
046    assertNull(getResultRef.get());
047
048    pending.prepare("abc");
049    Thread.sleep(100);
050    assertEquals("abc", getResultRef.get());
051  }
052}