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;
027
028import org.apache.hadoop.hbase.HBaseClassTestRule;
029import org.apache.hadoop.hbase.testclassification.MiscTests;
030import org.apache.hadoop.hbase.testclassification.SmallTests;
031import org.junit.ClassRule;
032import org.junit.Test;
033import org.junit.experimental.categories.Category;
034
035@Category({ MiscTests.class, SmallTests.class })
036public class TestEnvironmentEdgeManager {
037
038  @ClassRule
039  public static final HBaseClassTestRule CLASS_RULE =
040    HBaseClassTestRule.forClass(TestEnvironmentEdgeManager.class);
041
042  @Test
043  public void testManageSingleton() {
044    EnvironmentEdgeManager.reset();
045    EnvironmentEdge edge = EnvironmentEdgeManager.getDelegate();
046    assertNotNull(edge);
047    assertTrue(edge instanceof DefaultEnvironmentEdge);
048    EnvironmentEdgeManager.reset();
049    EnvironmentEdge edge2 = EnvironmentEdgeManager.getDelegate();
050    assertFalse(edge == edge2);
051    IncrementingEnvironmentEdge newEdge = new IncrementingEnvironmentEdge();
052    EnvironmentEdgeManager.injectEdge(newEdge);
053    assertEquals(newEdge, EnvironmentEdgeManager.getDelegate());
054
055    // injecting null will result in default being assigned.
056    EnvironmentEdgeManager.injectEdge(null);
057    EnvironmentEdge nullResult = EnvironmentEdgeManager.getDelegate();
058    assertTrue(nullResult instanceof DefaultEnvironmentEdge);
059  }
060
061  @Test
062  public void testCurrentTimeInMillis() {
063    EnvironmentEdge mock = mock(EnvironmentEdge.class);
064    EnvironmentEdgeManager.injectEdge(mock);
065    long expectation = 3456;
066    when(mock.currentTime()).thenReturn(expectation);
067    long result = EnvironmentEdgeManager.currentTime();
068    verify(mock).currentTime();
069    assertEquals(expectation, result);
070  }
071}