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 java.util.concurrent.atomic.AtomicReference;
021import org.apache.hadoop.hbase.HBaseClassTestRule;
022import org.apache.hadoop.hbase.testclassification.SmallTests;
023import org.apache.hadoop.hbase.testclassification.ZKTests;
024import org.junit.Assert;
025import org.junit.ClassRule;
026import org.junit.Test;
027import org.junit.experimental.categories.Category;
028
029@Category({ ZKTests.class, SmallTests.class })
030public class TestInstancePending {
031
032  @ClassRule
033  public static final HBaseClassTestRule CLASS_RULE =
034    HBaseClassTestRule.forClass(TestInstancePending.class);
035
036  @Test
037  public void test() throws Exception {
038    final InstancePending<String> pending = new InstancePending<>();
039    final AtomicReference<String> getResultRef = new AtomicReference<>();
040
041    new Thread() {
042      @Override
043      public void run() {
044        getResultRef.set(pending.get());
045      }
046    }.start();
047
048    Thread.sleep(100);
049    Assert.assertNull(getResultRef.get());
050
051    pending.prepare("abc");
052    Thread.sleep(100);
053    Assert.assertEquals("abc", getResultRef.get());
054  }
055}