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.util;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.assertFalse;
022import static org.junit.Assert.assertNotNull;
023import static org.junit.Assert.assertTrue;
024import static org.mockito.Mockito.mock;
025import static org.mockito.Mockito.verify;
026import static org.mockito.Mockito.when;
027import org.apache.hadoop.hbase.HBaseClassTestRule;
028import org.apache.hadoop.hbase.testclassification.MiscTests;
029import org.apache.hadoop.hbase.testclassification.SmallTests;
030import org.junit.ClassRule;
031import org.junit.Test;
032import org.junit.experimental.categories.Category;
033
034@Category({MiscTests.class, SmallTests.class})
035public class TestEnvironmentEdgeManager {
036
037  @ClassRule
038  public static final HBaseClassTestRule CLASS_RULE =
039      HBaseClassTestRule.forClass(TestEnvironmentEdgeManager.class);
040
041  @Test
042  public void testManageSingleton() {
043    EnvironmentEdgeManager.reset();
044    EnvironmentEdge edge = EnvironmentEdgeManager.getDelegate();
045    assertNotNull(edge);
046    assertTrue(edge instanceof DefaultEnvironmentEdge);
047    EnvironmentEdgeManager.reset();
048    EnvironmentEdge edge2 = EnvironmentEdgeManager.getDelegate();
049    assertFalse(edge == edge2);
050    IncrementingEnvironmentEdge newEdge = new IncrementingEnvironmentEdge();
051    EnvironmentEdgeManager.injectEdge(newEdge);
052    assertEquals(newEdge, EnvironmentEdgeManager.getDelegate());
053
054    //injecting null will result in default being assigned.
055    EnvironmentEdgeManager.injectEdge(null);
056    EnvironmentEdge nullResult = EnvironmentEdgeManager.getDelegate();
057    assertTrue(nullResult instanceof DefaultEnvironmentEdge);
058  }
059
060  @Test
061  public void testCurrentTimeInMillis() {
062    EnvironmentEdge mock = mock(EnvironmentEdge.class);
063    EnvironmentEdgeManager.injectEdge(mock);
064    long expectation = 3456;
065    when(mock.currentTime()).thenReturn(expectation);
066    long result = EnvironmentEdgeManager.currentTime();
067    verify(mock).currentTime();
068    assertEquals(expectation, result);
069  }
070}